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Ahlqvist VH, Sjöqvist H, Dalman C, Karlsson H, Stephansson O, Johansson S, Magnusson C, Gardner RM, Lee BK. Acetaminophen Use During Pregnancy and Children's Risk of Autism, ADHD, and Intellectual Disability. JAMA 2024; 331:1205-1214. [PMID: 38592388 PMCID: PMC11004836 DOI: 10.1001/jama.2024.3172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 02/22/2024] [Indexed: 04/10/2024]
Abstract
Importance Several studies suggest that acetaminophen (paracetamol) use during pregnancy may increase risk of neurodevelopmental disorders in children. If true, this would have substantial implications for management of pain and fever during pregnancy. Objective To examine the associations of acetaminophen use during pregnancy with children's risk of autism, attention-deficit/hyperactivity disorder (ADHD), and intellectual disability. Design, Setting, and Participants This nationwide cohort study with sibling control analysis included a population-based sample of 2 480 797 children born in 1995 to 2019 in Sweden, with follow-up through December 31, 2021. Exposure Use of acetaminophen during pregnancy prospectively recorded from antenatal and prescription records. Main Outcomes and Measures Autism, ADHD, and intellectual disability based on International Classification of Diseases, Ninth Revision and International Classification of Diseases, Tenth Revision codes in health registers. Results In total, 185 909 children (7.49%) were exposed to acetaminophen during pregnancy. Crude absolute risks at 10 years of age for those not exposed vs those exposed to acetaminophen were 1.33% vs 1.53% for autism, 2.46% vs 2.87% for ADHD, and 0.70% vs 0.82% for intellectual disability. In models without sibling control, ever-use vs no use of acetaminophen during pregnancy was associated with marginally increased risk of autism (hazard ratio [HR], 1.05 [95% CI, 1.02-1.08]; risk difference [RD] at 10 years of age, 0.09% [95% CI, -0.01% to 0.20%]), ADHD (HR, 1.07 [95% CI, 1.05-1.10]; RD, 0.21% [95% CI, 0.08%-0.34%]), and intellectual disability (HR, 1.05 [95% CI, 1.00-1.10]; RD, 0.04% [95% CI, -0.04% to 0.12%]). To address unobserved confounding, matched full sibling pairs were also analyzed. Sibling control analyses found no evidence that acetaminophen use during pregnancy was associated with autism (HR, 0.98 [95% CI, 0.93-1.04]; RD, 0.02% [95% CI, -0.14% to 0.18%]), ADHD (HR, 0.98 [95% CI, 0.94-1.02]; RD, -0.02% [95% CI, -0.21% to 0.15%]), or intellectual disability (HR, 1.01 [95% CI, 0.92-1.10]; RD, 0% [95% CI, -0.10% to 0.13%]). Similarly, there was no evidence of a dose-response pattern in sibling control analyses. For example, for autism, compared with no use of acetaminophen, persons with low (<25th percentile), medium (25th-75th percentile), and high (>75th percentile) mean daily acetaminophen use had HRs of 0.85, 0.96, and 0.88, respectively. Conclusions and Relevance Acetaminophen use during pregnancy was not associated with children's risk of autism, ADHD, or intellectual disability in sibling control analysis. This suggests that associations observed in other models may have been attributable to familial confounding.
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Affiliation(s)
- Viktor H. Ahlqvist
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Hugo Sjöqvist
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Christina Dalman
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Olof Stephansson
- Clinical Epidemiology Division, Department of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden
- Department of Women’s Health, Division of Obstetrics, Karolinska University Hospital, Stockholm, Sweden
| | - Stefan Johansson
- Clinical Epidemiology Division, Department of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden
- Department of Neonatology, Sachs’ Children and Youth Hospital, Stockholm, Sweden
| | - Cecilia Magnusson
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
- Centre for Epidemiology and Community Medicine, Region Stockholm, Stockholm, Sweden
| | - Renee M. Gardner
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Brian K. Lee
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
- Department of Epidemiology and Biostatistics, Drexel University Dornsife School of Public Health, Philadelphia, Pennsylvania
- A.J. Drexel Autism Institute, Drexel University, Philadelphia, Pennsylvania
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Chen S, Ahlqvist VH, Sjöqvist H, Stephansson O, Magnusson C, Dalman C, Karlsson H, Lee BK, Gardner RM. Maternal intrahepatic cholestasis of pregnancy and neurodevelopmental conditions in offspring: A population-based cohort study of 2 million Swedish children. PLoS Med 2024; 21:e1004331. [PMID: 38227577 PMCID: PMC10790993 DOI: 10.1371/journal.pmed.1004331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 12/06/2023] [Indexed: 01/18/2024] Open
Abstract
BACKGROUND Intrahepatic cholestasis of pregnancy (ICP) is the most common obstetric liver disorder and is associated with an increased risk of iatrogenic preterm birth and adverse infant outcomes. Hence, there are several plausible pathways through which ICP could affect offspring neurodevelopment. However, to the best of our knowledge, no studies have investigated these associations. Thus, we aimed to determine whether ICP is associated with offspring neurodevelopmental conditions. METHODS AND FINDINGS In this Swedish register-based cohort study, we included singleton non-adopted children born in Sweden between the 1st of January 1987 and the 31st of December 2010, who were resident in Sweden >5 years, with no missing covariate information, which we followed until the 31st of December 2016. Maternal ICP diagnosis and the date of the initial diagnosis during pregnancy were obtained from the National Patient Register. Offspring diagnoses of attention deficit/hyperactivity disorder (ADHD), autism, or intellectual disability were obtained from the National Patient Register, and the dispensation of ADHD medications were obtained from the Prescribed Drug Register. Odds ratios (ORs) and 95% confidence intervals (CIs) were estimated using logistic regression while controlling for observed confounders and unobserved confounders shared among full siblings and maternal full cousins. A total of 2,375,856 children were included in the study; 81.6% of them were of Nordic origin, and 51.4% were male. Of these, 10,378 (0.44%) were exposed to ICP. During a median of 18 years follow-up (interquartile range 11 to 24), 143,746 (6.05%) of children were diagnosed with a neurodevelopmental condition. After adjusting for child's sex, birth year, birth month, maternal age, highest parental education level, maternal birth country, birth order, maternal psychiatric history, ICP was associated with increased odds of offspring neurodevelopmental conditions (OR 1.22, 95% CI 1.13 to 1.31), particularly among those exposed to early-onset ICP (OR 2.38, 95% CI 1.71 to 3.30) as compared to ICP diagnosed after reaching term (≥37 weeks of gestation) (OR 1.08, 95% CI 0.97 to 1.20). The findings of early-onset ICP were consistent in family-based analyses. Within-family comparisons of full maternal cousins yielded an OR of 2.99 (95% CI 1.48 to 6.04), and comparisons of full siblings showed an OR of 1.92 (95% CI 0.92 to 4.02), though the latter was less precise. The findings were consistent across specific neurodevelopmental conditions and different analytical approaches. The primary limitations of this study included its observational design, the absence of data on ICP therapeutics, and the lack of bile acid measures. CONCLUSIONS In this study, we observed that exposure to ICP during gestation is associated with an increased likelihood of neurodevelopmental conditions in offspring, particularly in cases of early-onset ICP. Further studies are warranted to better understand the role of early-ICP in offspring neurodevelopment.
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Affiliation(s)
- Shuyun Chen
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Viktor H. Ahlqvist
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Hugo Sjöqvist
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Olof Stephansson
- Clinical Epidemiology Division, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
- Department of Women’s Health, Division of Obstetrics, Karolinska University Hospital, Stockholm, Sweden
| | - Cecilia Magnusson
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
- Centre for Epidemiology and Community Medicine, Region Stockholm, Stockholm, Sweden
| | - Christina Dalman
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
- Centre for Epidemiology and Community Medicine, Region Stockholm, Stockholm, Sweden
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Brian K. Lee
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
- A.J. Drexel Autism Institute, Drexel University, Philadelphia, Pennsylvania, United States of America
- Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, Pennsylvania, United States of America
| | - Renee M. Gardner
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
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Chen S, Wang X, Lee BK, Gardner RM. Associations between maternal metabolic conditions and neurodevelopmental conditions in offspring: the mediating effects of obstetric and neonatal complications. BMC Med 2023; 21:422. [PMID: 37936224 PMCID: PMC10631144 DOI: 10.1186/s12916-023-03116-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 10/16/2023] [Indexed: 11/09/2023] Open
Abstract
BACKGROUND Maternal pre-gestational diabetes (PGDM), gestational diabetes mellitus (GDM), and overweight/obesity have been associated with increased risks of offspring neurodevelopmental conditions (NDCs) including autism, intellectual disability (ID), and attention deficit/hyperactivity disorder (ADHD). Less is known about whether and how obstetric and neonatal complications (e.g., preterm birth, neonatal asphyxia) could mediate these associations. METHODS In this Swedish register-based cohort study, we examined complications during pregnancy, delivery, and the neonatal period as potential mediators of the relationships between maternal metabolic conditions and offspring NDCs. We quantified the extent to which these obstetric and neonatal factors could mediate the associations of maternal metabolic conditions with offspring NDCs by applying parametric regression models for single mediation analyses and weighting-based methods for multiple mediation analyses under counterfactual frameworks. RESULTS The study sample included 2,352,969 singleton children born to 1,299,692 mothers from 1987-2010 who were followed up until December 31, 2016, of whom 135,832 children (5.8%) were diagnosed with at least one NDC. A substantial portion of the association between maternal PGDM and children's odds of NDCs could be explained by the combined group of obstetric and neonatal complications in the multiple mediation analysis. For instance, these complications explained 44.4% of the relationship between maternal PGDM and offspring ID risk. The proportion of the relationship between maternal overweight/obesity and children's risk of NDCs that could be explained by obstetric and neonatal complications was considerably smaller, ranging from 1.5 to 8.1%. Some complications considered on their own, including pregnancy hypertensive diseases, preterm birth, neonatal asphyxia, and hematological comorbidities, could explain at least 10% of the associations between maternal PGDM and offspring NDCs. Complications during the neonatal period showed a stronger joint mediating effect for the relationship between PGDM and offspring NDCs than those during pregnancy or delivery. CONCLUSIONS Obstetric and neonatal complications could explain nearly half of the association between maternal PGDM and offspring risk of NDCs. The mediating effects were more pronounced for complications during the neonatal period and for specific complications such as pregnancy hypertensive diseases, preterm birth, neonatal asphyxia, and hematological comorbidities. Effective preventive strategies for offspring NDCs should holistically address both the primary metabolic issues related to PGDM and the wide array of potential complications, especially those in the neonatal period.
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Affiliation(s)
- Shuyun Chen
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden.
| | - Xi Wang
- PolicyLab, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Brian K Lee
- Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, PA, USA
- A.J. Drexel Autism Institute, Philadelphia, PA, USA
| | - Renee M Gardner
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden.
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Chen S, Persson M, Wang R, Dalman C, Lee BK, Karlsson H, Gardner RM. Random capillary glucose levels throughout pregnancy, obstetric and neonatal outcomes, and long-term neurodevelopmental conditions in children: a group-based trajectory analysis. BMC Med 2023; 21:260. [PMID: 37468907 DOI: 10.1186/s12916-023-02926-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 06/06/2023] [Indexed: 07/21/2023] Open
Abstract
BACKGROUND Gestational diabetes mellitus (GDM) is associated with both short- and long-term risks, although it is unknown if risks vary by severity, timing, and duration of gestational hyperglycemia. We aimed to identify trajectories of random capillary glucose (RCG) levels throughout pregnancy and assess their associations with both obstetric/neonatal outcomes and children's risk of neurodevelopmental conditions (NDCs) (i.e., autism, intellectual disability, and attention-deficit/hyperactivity disorders [ADHD]). METHODS A population-based cohort study was conducted involving 76,228 children born to 68,768 mothers without pregestational diabetes. Group-based trajectory modeling was utilized to identify distinct glucose trajectories across RCG values throughout the course of pregnancy. The associations between these trajectory groups and obstetric/neonatal outcomes as well as children's NDCs were then assessed using generalized estimating equation models with a logit link. The Benjamini-Hochberg (BH) procedure was employed to adjust P-values for multiple comparisons, controlling the false discovery rate (FDR). RESULTS Five distinct glucose trajectory groups were identified, each with varying percentages diagnosed with GDM. Their associations with obstetric/neonatal outcomes as well as children's NDCs varied. For example, when compared to the "Persistently Low" group, other groups exhibited varying degrees of increased risk for large-for-gestational-age babies, with the exception of the "High in Early Pregnancy" group. Compared to the "Persistently Low" group, all other trajectory groups were associated with NDC outcomes, except the "High in Mid-Pregnancy" group. However, none of the associations with offspring NDCs remained significant after accounting for the FDR correction. CONCLUSIONS Persistent high glucose levels or moderately elevated glucose levels throughout pregnancy, as well as transient states of hyperglycemia in early or mid-pregnancy, were found to be associated with increased risks of specific obstetric and neonatal complications, and potentially offspring NDCs. These risks varied depending on the severity, timing, duration, and management of hyperglycemia. The findings underscore the need for continuous surveillance and individualized management strategies for women displaying different glucose trajectories during pregnancy. Limitations such as potential residual confounding, the role of mediators, and small sample size should be addressed in future studies.
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Affiliation(s)
- Shuyun Chen
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | | | - Rui Wang
- The Swedish School of Sport and Health Sciences, GIH, Stockholm, Sweden
- Department of Neurobiology, Care Sciences and Society (NVS), Karolinska Institutet, Stockholm, Sweden
| | - Christina Dalman
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Brian K Lee
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
- Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, PA, USA
- A.J. Drexel Autism Institute, Philadelphia, PA, USA
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Renee M Gardner
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden.
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Chen S, Fan M, Lee BK, Dalman C, Karlsson H, Gardner RM. Rates of maternal weight gain over the course of pregnancy and offspring risk of neurodevelopmental disorders. BMC Med 2023; 21:108. [PMID: 36959571 PMCID: PMC10035205 DOI: 10.1186/s12916-023-02799-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 02/20/2023] [Indexed: 03/25/2023] Open
Abstract
Background Previous studies have suggested that gestational weight gain (GWG) outside an optimal range increases the risks of neurodevelopmental disorders (NDDs) in offspring including autism spectrum disorder (ASD), intellectual disability (ID), and attention deficit/hyperactivity disorder (ADHD). The sequential development of the fetal brain suggests that its vulnerability may vary depending on the timing of exposure. Therefore, we aimed to investigate the associations of not only gestational age-standardized total GWG (GWG z-scores) but also the rate of GWG (RGWG) in the second and third trimesters with risks of NDDs in offspring. Methods In this population-based cohort study, we used maternal weight data from antenatal care records collected for 57,822 children born to 53,516 mothers between 2007 and 2010 in the Stockholm Youth Cohort. Children were followed from 2 years of age to December 31, 2016. GWG z-scores and RGWG (kg/week) in the second and third trimesters were considered as continuous variables in cox regression models, clustered on maternal identification numbers. Nonlinear relationships were accommodated using restricted cubic splines with 3 knots. RGWG were also categorized according to the 2009 US Institute of Medicine (IOM) guidelines for optimal GWG. According to the IOM guidelines, the optimal rate of GWG for the second and third trimesters for underweight, normal weight, overweight, and obese categories were 0.44–0.58, 0.35–0.50, 0.23–0.33, and 0.17–0.27 kg/week, respectively. Results During a mean follow-up of 5.4 years (until children were on average 7.4 years old), 2205 (3.8%) children were diagnosed with NDDs, of which 1119 (1.9%) received a diagnosis of ASD, 1353 (2.3%) ADHD, and 270 (0.5%) ID. We observed a J-shaped association between total GWG z-score and offspring risk of NDDs, with higher total GWG (GWG z-score = 2) associated with 19% increased risk of any NDD (95% CI = 3–37%) and lower total GWG (GWG z-score = − 2) associated with 12% increased risk of any NDDs (95% CI = 2–23%), compared to the reference (GWG z-score = 0). In the second trimester, lower RGWG (0.25 kg/week) was associated with a 9% increased risk of any NDD diagnosis (95% CI = 4–15%) compared to the median of 0.57 kg/week, with no apparent relationship between higher RGWG and risk of NDDs. In the third trimester, there was no apparent association between lower RGWG and risk of NDDs, though higher RGWG (1 kg/week) was associated with a 28% increased risk of NDD diagnosis (95% CI = 16–40%), compared to the median (0.51 kg/week). When considering categorized RGWG, we found that slow weight gain in the second trimester followed by rapid weight gain in the third trimester most significantly increased the risk of ADHD (HRadjusted = 1.55, 1.13–2.13) and ID (HRadjusted = 2.53, 1.15–5.55) in offspring. The main limitations of our study are the relatively few years for which detailed GWG data were available and the relatively short follow-up for the outcomes, limiting power to detect associations and misclassifying children who receive an NDD diagnosis later in childhood. Conclusions The relationship between maternal weight gain and children’s risk of NDDs varied according to timing in pregnancy, with the greatest risks associated with slow weight gain in the second trimester and rapid weight gain in the third trimester. Supplementary Information The online version contains supplementary material available at 10.1186/s12916-023-02799-6.
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Affiliation(s)
- Shuyun Chen
- grid.4714.60000 0004 1937 0626Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Mengyu Fan
- grid.4714.60000 0004 1937 0626Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Brian K. Lee
- grid.4714.60000 0004 1937 0626Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
- grid.166341.70000 0001 2181 3113Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, PA USA
- A.J. Drexel Autism Institute, Philadelphia, PA USA
| | - Christina Dalman
- grid.4714.60000 0004 1937 0626Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
- grid.425979.40000 0001 2326 2191Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Håkan Karlsson
- grid.4714.60000 0004 1937 0626Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Renee M. Gardner
- grid.4714.60000 0004 1937 0626Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
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Brynge M, Sjöqvist H, Gardner RM, Lee BK, Dalman C, Karlsson H. Maternal infection during pregnancy and likelihood of autism and intellectual disability in children in Sweden: a negative control and sibling comparison cohort study. Lancet Psychiatry 2022; 9:782-791. [PMID: 36087610 DOI: 10.1016/s2215-0366(22)00264-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 06/30/2022] [Accepted: 07/06/2022] [Indexed: 11/16/2022]
Abstract
BACKGROUND Maternal infections during pregnancy are associated with intellectual disability and autism in exposed children. Whether these associations are causal, and therefore should be targets of preventive strategies, remains unknown. We aimed to investigate these associations, to determine whether there is a causal role of maternal infection during pregnancy for children's risk of autism and intellectual disability, by accounting for unmeasured familial factors. METHODS We used a register-based cohort study design, and included children living in Stockholm County, Sweden, who were born in 1987-2010. We excluded children not born in Sweden, adopted children, and children with unknown biological mothers or fathers. Maternal infections during pregnancy, defined by ICD-8, ICD-9, and ICD-10 codes, were identified in the National Patient Register and Medical Birth Register. Children were followed up from birth to an outcome or a censoring event (death, migration from Stockholm, age 18 years, or Dec 31, 2016, whichever occurred first). The primary outcomes were diagnosis of autism or diagnosis of intellectual disability. We did a survival analysis to examine the association between inpatient and outpatient specialised care for any infection during pregnancy and likelihood of autism or intellectual disability in the child. To address potential residual confounding, we also estimated the relationship between maternal infection in the year preceding pregnancy as a negative control exposure and conducted a matched sibling analysis of sibling pairs who were discordant for autism or intellectual disability. FINDINGS 647 947 children living in Stockholm County were identified and, after excluding 97 980 children, we included 549 967 in the study (267 995 [48·7%] were female and 281 972 [51·3%] were male; mean age at censoring 13·5 years [SD 5·0; range <1 to 18]; 142 597 [25·9%] had a mother who was not born in Sweden). 445 (1·3%) of 34 013 children exposed to maternal infection during pregnancy were diagnosed with intellectual disability and 1123 (3·3%) with autism. 5087 (1·0%) of 515 954 unexposed children were diagnosed with intellectual disability and 13 035 (2·5%) with autism. Maternal infection during pregnancy was associated with autism (hazard ratio [HR] 1·16, 95% CI 1·09-1·23) and intellectual disability (1·37, 1·23-1·51) in exposed children compared with unexposed children. Maternal infection in the year before pregnancy (negative control exposure) was also associated with autism (HR 1·25, 95% CI 1·14-1·36), but was not associated with intellectual disability (1·09, 0·94-1·27). In sibling comparisons, the associations with maternal infection during pregnancy were attenuated for autism (HR 0·94, 95% CI 0·82-1·08; n=21 864), but not to the same extent for intellectual disability (1·15, 0·95-1·40; n=9275). INTERPRETATION Although infections in pregnant women are associated with both autism and intellectual disability in their children, the association with autism does not appear to reflect a causal relationship, but is more likely to be explained by factors shared between family members such as genetic variation or aspects of the shared environment. Thus, infection prevention is not expected to reduce autism incidence. For intellectual disability, unmeasured familial factors might not fully explain the observed associations, and a causal role of maternal infections cannot be excluded. Causal effects of specific but rare infections or infections not requiring health care contact cannot be excluded in either autism or intellectual disability. FUNDING Swedish Research Council, Stanley Medical Research Institute, and Autism Speaks. TRANSLATION For the Swedish translation of the abstract see Supplementary Materials section.
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Affiliation(s)
- Martin Brynge
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden.
| | - Hugo Sjöqvist
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Renee M Gardner
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Brian K Lee
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden; Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, PA, USA; A J Drexel Autism Institute, Philadelphia, PA, USA
| | - Christina Dalman
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden; Centre for Epidemiology and Community Medicine, Region Stockholm, Stockholm, Sweden
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
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Sadik A, Dardani C, Pagoni P, Havdahl A, Stergiakouli E, Khandaker GM, Sullivan SA, Zammit S, Jones HJ, Davey Smith G, Dalman C, Karlsson H, Gardner RM, Rai D. Parental inflammatory bowel disease and autism in children. Nat Med 2022; 28:1406-1411. [PMID: 35654906 PMCID: PMC9307481 DOI: 10.1038/s41591-022-01845-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 04/28/2022] [Indexed: 01/30/2023]
Abstract
Evidence linking parental inflammatory bowel disease (IBD) with autism in children is inconclusive. We conducted four complementary studies to investigate associations between parental IBD and autism in children, and elucidated their underlying etiology. Conducting a nationwide population-based cohort study using Swedish registers, we found evidence of associations between parental diagnoses of IBD and autism in children. Polygenic risk score analyses of the Avon Longitudinal Study of Parents and Children suggested associations between maternal genetic liability to IBD and autistic traits in children. Two-sample Mendelian randomization analyses provided evidence of a potential causal effect of genetic liability to IBD, especially ulcerative colitis, on autism. Linkage disequilibrium score regression did not indicate a genetic correlation between IBD and autism. Triangulating evidence from these four complementary approaches, we found evidence of a potential causal link between parental, particularly maternal, IBD and autism in children. Perinatal immune dysregulation, micronutrient malabsorption and anemia may be implicated.
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Affiliation(s)
- Aws Sadik
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Avon and Wiltshire Partnership NHS Mental Health Trust, Bath, UK
| | - Christina Dardani
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
| | - Panagiota Pagoni
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
| | - Alexandra Havdahl
- Medical Research Council Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
- Department of Mental Disorders, Norwegian Institute of Public Health, Oslo, Norway
- Nic Waals Institute, Lovisenberg Diakonale Hospital, Oslo, Norway
- PROMENTA Research Center, Department of Psychology, University of Oslo, Oslo, Norway
| | - Evie Stergiakouli
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
| | - Golam M Khandaker
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Avon and Wiltshire Partnership NHS Mental Health Trust, Bath, UK
- Medical Research Council Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
- Department of Psychiatry, University of Cambridge, Cambridge, UK
- Cambridgeshire and Peterborough NHS Foundation Trust, Cambridge, UK
- National Institute of Health and Care Research Biomedical Research Centre, University Hospitals Bristol and Weston NHS Foundation Trust and University of Bristol, Bristol, UK
| | - Sarah A Sullivan
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- National Institute of Health and Care Research Biomedical Research Centre, University Hospitals Bristol and Weston NHS Foundation Trust and University of Bristol, Bristol, UK
| | - Stan Zammit
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- National Institute of Health and Care Research Biomedical Research Centre, University Hospitals Bristol and Weston NHS Foundation Trust and University of Bristol, Bristol, UK
- Division of Psychological Medicine and Clinical Neurosciences, Cardiff University, Cardiff, UK
| | - Hannah J Jones
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
- National Institute of Health and Care Research Biomedical Research Centre, University Hospitals Bristol and Weston NHS Foundation Trust and University of Bristol, Bristol, UK
| | - George Davey Smith
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Medical Research Council Integrative Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
- National Institute of Health and Care Research Biomedical Research Centre, University Hospitals Bristol and Weston NHS Foundation Trust and University of Bristol, Bristol, UK
| | - Christina Dalman
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
- Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Renee M Gardner
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Dheeraj Rai
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- Avon and Wiltshire Partnership NHS Mental Health Trust, Bath, UK
- National Institute of Health and Care Research Biomedical Research Centre, University Hospitals Bristol and Weston NHS Foundation Trust and University of Bristol, Bristol, UK
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8
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Brynge M, Gardner RM, Sjöqvist H, Lee BK, Dalman C, Karlsson H. Maternal Levels of Cytokines in Early Pregnancy and Risk of Autism Spectrum Disorders in Offspring. Front Public Health 2022; 10:917563. [PMID: 35712277 PMCID: PMC9197505 DOI: 10.3389/fpubh.2022.917563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 05/04/2022] [Indexed: 11/24/2022] Open
Abstract
Previous studies indicate a role of immune disturbances during early development in the etiology of autism spectrum disorders (ASD). Any potential disturbances during fetal development are best addressed by prospective evaluation of maternal markers of inflammation. Previous studies have investigated maternal cytokines, a group of powerful effectors of the immune system, with inconsistent results. In this study, we aimed to clarify the relationship between maternal cytokines and ASD by evaluating levels of 17 cytokines in first trimester maternal serum samples, from 318 mothers to ASD-cases and 429 mothers to ASD-unaffected controls, nested within the register-based Stockholm Youth Cohort. Overall, we observed no consistent associations between levels of maternal cytokines and ASD. While we observed a number of individual associations, the patterns varied across the diagnostic sub-groups. Levels above the 90th percentile of IL-1β (OR = 2.31, 95% CI 1.16–4.60), IL-7 (OR = 2.28, 95% CI 1.20–4.33), IL-13 (OR = 2.42, 95% CI 1.29–4.55), and MCP-1 (OR = 2.09, 95% CI 1.03–4.24) were associated with increased odds of ASD with co-occurring intellectual disability (ID), whereas GMCSF (OR = 2.06, 95% CI 1.03–4.11) and TNF-α (OR = 2.31, 95% CI 1.18–4.50) were associated with increased odds of ASD with ADHD but none survived correction for multiple comparisons. Also, none of the measured maternal cytokines were associated with ASD without co-occurring ID or ADHD. Implementing a data-driven approach using machine learning (Random Forest's Variable Importance measurement), we found no evidence to suggest that adding these cytokines and other markers of maternal immunity, to register-based maternal factors (e.g., psychiatric history) improves prediction of ASD. In summary, we found no robust evidence of an association between maternal immune markers during early pregnancy and ASD.
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Affiliation(s)
- Martin Brynge
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Renee M Gardner
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Hugo Sjöqvist
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Brian K Lee
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden.,Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, PA, United States.,A.J. Drexel Autism Institute, Philadelphia, PA, United States
| | - Christina Dalman
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden.,Centre for Epidemiology and Community Medicine, Region Stockholm, Stockholm, Sweden
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
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9
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Gardner RM, Lee BK, Brynge M, Sjöqvist H, Dalman C, Karlsson H. Reply to: C-Reactive Protein in Neonates and Risk for Autism Spectrum Disorder. Biol Psychiatry 2021; 90:e65-e66. [PMID: 34246464 DOI: 10.1016/j.biopsych.2021.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 11/30/2022]
Affiliation(s)
- Renee M Gardner
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden.
| | - Brian K Lee
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden; Department of Epidemiology and Biostatistics, Dornsife School of Public Health, Drexel University, Philadelphia, Pennsylvania; A.J. Drexel Autism Institute, Philadelphia, Pennsylvania
| | - Martin Brynge
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Hugo Sjöqvist
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Christina Dalman
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden; Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
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10
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Gardner RM, Samuelsson I, Severance EG, Sjöqvist H, Yolken RH, Dalman C, Karlsson H. Maternal antibodies to gliadin and autism spectrum disorders in offspring-A population-based case-control study in Sweden. Autism Res 2021; 14:2002-2016. [PMID: 34213825 DOI: 10.1002/aur.2567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 05/21/2021] [Accepted: 06/04/2021] [Indexed: 11/08/2022]
Abstract
While individuals diagnosed with autism spectrum disorders (ASD) have higher levels of antibodies directed towards gliadin, a component of wheat gluten, no study has examined anti-gliadin antibodies (AGA) in etiologically relevant periods before diagnosis. The objective of this study was to investigate if maternal levels of AGA, during pregnancy and at the time of birth, are associated with ASD in offspring. We analyzed AGA in archived neonatal dried blood spots (NDBS) for 921 ASD cases and 1090 controls, and in paired maternal sera collected earlier in pregnancy for a subset of 547 cases and 428 controls. We examined associations with ASD diagnoses as a group and considering common comorbidities (intellectual disability [ID] and attention-deficit/hyperactivity disorder). We compared 206 cases to their unaffected siblings to examine the potential for confounding by shared familial factors. Odds of ASD tended to be lower among those with the highest levels (≥90th percentile) of AGA compared to those with low levels (<80th percentile; OR 0.78, 95% CI 0.56-1.09, measured in NDBS). This pattern was more apparent for ASD with comorbid ID when measured in NDBS (0.51, 0.30-0.87), with a similar trend in maternal sera (0.55, 0.24-1.29). High levels of AGA were similarly associated with lower odds of ASD in the sibling comparison. In summary, we found little association between maternal antibodies raised against components of gluten and risk of ASD in general. Exposure to high levels of AGA in the pre- and perinatal periods may be protective in terms of risk for ASD with ID. LAY SUMMARY: There is a debate among both scientists and community members as to whether an immune reaction to gluten exposure could be considered a cause of autism. We examined antibodies that are directed against gliadin, a part of gluten, in samples collected from pregnant mothers and their newborn babies. We did not see any major differences in the antibody level among those children diagnosed with ASD or their mothers compared to children who were not diagnosed with ASD. High levels of the antibodies were in fact associated with a somewhat lower risk of ASD with co-occurring intellectual disabilities, though we cannot tell from this study why that might be the case.
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Affiliation(s)
- Renee M Gardner
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Ida Samuelsson
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Emily G Severance
- Stanley Division of Developmental Neurovirology, The Johns Hopkins University, School of Medicine, Baltimore, Maryland, USA
| | - Hugo Sjöqvist
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Robert H Yolken
- Stanley Division of Developmental Neurovirology, The Johns Hopkins University, School of Medicine, Baltimore, Maryland, USA
| | - Christina Dalman
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
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11
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Gardner RM, Lee BK, Brynge M, Sjöqvist H, Dalman C, Karlsson H. Neonatal Levels of Acute Phase Proteins and Risk of Autism Spectrum Disorder. Biol Psychiatry 2021; 89:463-475. [PMID: 33187600 DOI: 10.1016/j.biopsych.2020.09.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 09/03/2020] [Accepted: 09/03/2020] [Indexed: 12/27/2022]
Abstract
BACKGROUND Immune signaling pathways influence neurodevelopment and are hypothesized to contribute to the etiology of autism spectrum disorder (ASD). We aimed to assess risk of ASD in relation to levels of neonatal acute phase proteins (APPs), key components of innate immune function, measured in neonatal dried blood spots. METHODS We included 924 ASD cases, 1092 unaffected population-based controls, and 203 unaffected siblings of ASD cases in this case-control study nested within the register-based Stockholm Youth Cohort. Concentrations of 9 different APPs were measured in eluates from neonatal dried blood spots from cases, controls, and siblings using a bead-based multiplex assay. RESULTS Neonatal C-reactive protein was consistently associated with odds of ASD in case-control comparisons, with higher odds associated with the highest quintile compared with the middle quintile (odds ratio [OR] = 1.50, 95% confidence interval [CI] = 1.10-2.04) in adjusted analyses. In contrast, the lowest quintiles of α-2-macroglobulin (OR = 3.71, CI = 1.21-11.33), ferritin (OR = 4.20, CI = 1.40-12.65), and serum amyloid P (OR = 3.05, CI = 1.16-8.01) were associated with odds of ASD in the matched sibling comparison. Neonatal APPs varied with perinatal environmental factors and maternal/fetal phenotypes. Significant interactions in terms of risk for ASD were observed between neonatal APPs and maternal infection during late pregnancy, maternal anemia, and maternal psychiatric history. CONCLUSIONS Indicators of the neonatal innate immune response are associated with risk of ASD, although the nature of these associations varies considerably with factors in the perinatal environment and the genetic background of the comparison group.
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Affiliation(s)
- Renee M Gardner
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden.
| | - Brian K Lee
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden; Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, Pennsylvania; A.J. Drexel Autism Institute, Philadelphia, Pennsylvania
| | - Martin Brynge
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Hugo Sjöqvist
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Christina Dalman
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden; Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
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12
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Lee BK, Eyles DW, Magnusson C, Newschaffer CJ, McGrath JJ, Kvaskoff D, Ko P, Dalman C, Karlsson H, Gardner RM. Developmental vitamin D and autism spectrum disorders: findings from the Stockholm Youth Cohort. Mol Psychiatry 2021; 26:1578-1588. [PMID: 31695167 PMCID: PMC7200274 DOI: 10.1038/s41380-019-0578-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 10/07/2019] [Accepted: 10/23/2019] [Indexed: 12/18/2022]
Abstract
Animal studies indicate that early life vitamin D is crucial for proper neurodevelopment. Few studies have examined whether maternal and neonatal vitamin D concentrations influence risk of autism spectrum disorders (ASD). Participants were sampled from the Stockholm Youth Cohort, a register-based cohort in Sweden. Concentrations of total 25-hydroxyvitamin D (25OHD) were assessed from maternal and neonatal biosamples using a highly sensitive liquid chromatography tandem mass spectrometry method. The maternal sample consisted of 449 ASD cases and 574 controls, the neonatal sample: 1399 ASD cases and 1607 controls; and the paired maternal-neonatal sample: 340 ASD cases and 426 controls. Maternal 25OHD was not associated with child ASD in the overall sample. However, in Nordic-born mothers, maternal 25OHD insufficiency (25 - <50 nmol/L) at ~11 weeks gestation was associated with 1.58 times higher odds of ASD (95% CI: 1.00, 2.49) as compared with 25OHD sufficiency (≥50 nmol/L). Neonatal 25OHD < 25 nmol/L was associated with 1.33 times higher odds of ASD (95% CI: 1.02, 1.75) as compared with 25OHD ≥ 50 nmol/L. Sibling-matched control analyses indicated these associations were not likely due to familial confounding. Children with both maternal 25OHD and neonatal 25OHD below the median had 1.75 (95% CI: 1.08, 2.86) times the odds of ASD compared with children with maternal and neonatal 25OHD both below the median. Our results are consistent with an increasing body of evidence suggesting that vitamin D concentrations in early life may be associated with increased risk of neurodevelopmental disorders including ASD.
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Affiliation(s)
- Brian K. Lee
- grid.166341.70000 0001 2181 3113Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, PA USA ,A.J. Drexel Autism Institute, Philadelphia, PA USA ,grid.4714.60000 0004 1937 0626Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Darryl W. Eyles
- grid.1003.20000 0000 9320 7537Queensland Brain Institute, University of Queensland, St. Lucia, QLD Australia ,grid.417162.70000 0004 0606 3563Queensland Centre for Mental Health Research, The Park Centre for Mental Health, Wacol, QLD Australia
| | - Cecilia Magnusson
- grid.4714.60000 0004 1937 0626Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Craig J. Newschaffer
- grid.166341.70000 0001 2181 3113Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, PA USA ,A.J. Drexel Autism Institute, Philadelphia, PA USA
| | - John J. McGrath
- grid.1003.20000 0000 9320 7537Queensland Brain Institute, University of Queensland, St. Lucia, QLD Australia ,grid.417162.70000 0004 0606 3563Queensland Centre for Mental Health Research, The Park Centre for Mental Health, Wacol, QLD Australia ,grid.7048.b0000 0001 1956 2722National Centre for Register-based Research, Aarhus BSS, Aarhus University, Aarhus, Denmark
| | - David Kvaskoff
- grid.1003.20000 0000 9320 7537Queensland Brain Institute, University of Queensland, St. Lucia, QLD Australia
| | - Pauline Ko
- grid.1003.20000 0000 9320 7537Queensland Brain Institute, University of Queensland, St. Lucia, QLD Australia ,grid.417162.70000 0004 0606 3563Queensland Centre for Mental Health Research, The Park Centre for Mental Health, Wacol, QLD Australia
| | - Christina Dalman
- grid.4714.60000 0004 1937 0626Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Håkan Karlsson
- grid.4714.60000 0004 1937 0626Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Renee M. Gardner
- grid.4714.60000 0004 1937 0626Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
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13
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Johal JK, Bavan B, Zhang W, Gardner RM, Lathi RB, Milki AA. The impact of timing modified natural cycle frozen embryo transfer based on spontaneous luteinizing hormone surge. J Assist Reprod Genet 2020; 38:219-225. [PMID: 33230616 DOI: 10.1007/s10815-020-01994-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 10/26/2020] [Indexed: 11/28/2022] Open
Abstract
PURPOSE To evaluate whether adjusting timing of modified natural cycle frozen embryo transfer (mNC-FET) 1 day earlier in the setting of a spontaneous LH surge has an impact on pregnancy outcomes. METHODS This retrospective cohort study evaluated all mNC-FET with euploid blastocysts from May 1, 2016 to March 30, 2019, at a single academic institution. Standard protocol for mNC-FET included ultrasound monitoring and hCG trigger when the dominant follicle and endometrial lining were appropriately developed. Patients had serum LH, estradiol, and progesterone checked on day of trigger. If LH was ≥ 20 mIU/mL, trigger was given that day and FET was performed 6 days after surge (LH/HCG+6), with the intent of transferring 5 days after ovulation. If LH was < 20 mIU/mL, FET was performed 7 days after trigger (hCG+7). Primary outcomes included clinical pregnancy and live birth rates. To account for correlation between cycles, a generalized estimating equation (GEE) method for multivariable logistic regression was used. RESULTS Four hundred fifty-three mNC-FET cycles met inclusion criteria, of which 205 were in the LH/HCG+6 group and 248 were in the HCG+7 group. The overall clinical pregnancy rate was 64% and clinical miscarriage rate was 4.8%, with similar rates between the two groups. The overall live birth rate was 60.9% (61.0% in LH/HCG+6 group and 60.9% in HCG+7 group). After implementing GEE, the odds of CP (aOR 0.97, 95% CI [0.65-1.45], p = 0.88) and LB (aOR 0.98, 95% CI [0.67-1.45], p = 0.93) were similar in both groups. CONCLUSIONS In our study cohort, mNC-FET based on LH/HCG+6 versus HCG+7 had similar pregnancy outcomes.
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Affiliation(s)
- J K Johal
- Department of Obstetrics & Gynecology, Stanford University, 300 Pasteur Drive, Palo Alto, CA, 94304, USA.
| | - B Bavan
- Division of Reproductive Endocrinology & Infertility Department of Obstetrics & Gynecology, Stanford University, 1195 West Fremont Avenue, MC 7717, Sunnyvale, CA, 94087, USA
| | - W Zhang
- Stanford University School of Medicine, 291 Campus Drive, Stanford, CA, 94305, USA
| | - R M Gardner
- Quantitative Sciences Unit, Stanford University School of Medicine, 1701 Page Mill Road, Palo Alto, CA, 94304, USA
| | - R B Lathi
- Division of Reproductive Endocrinology & Infertility Department of Obstetrics & Gynecology, Stanford University, 1195 West Fremont Avenue, MC 7717, Sunnyvale, CA, 94087, USA
| | - A A Milki
- Division of Reproductive Endocrinology & Infertility Department of Obstetrics & Gynecology, Stanford University, 1195 West Fremont Avenue, MC 7717, Sunnyvale, CA, 94087, USA
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14
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Xie S, Karlsson H, Dalman C, Widman L, Rai D, Gardner RM, Magnusson C, Sandin S, Tabb LP, Newschaffer CJ, Lee BK. The Familial Risk of Autism Spectrum Disorder with and without Intellectual Disability. Autism Res 2020; 13:2242-2250. [PMID: 33103358 PMCID: PMC7821228 DOI: 10.1002/aur.2417] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 07/13/2020] [Accepted: 10/08/2020] [Indexed: 12/22/2022]
Abstract
Autism spectrum disorder (ASD) is highly heritable, yet how its familial risk and heritability may vary by cognitive ability is not well understood. In this population‐based cohort study, we examined the familial risk and heritability of ASD with and without co‐occurring intellectual disability (ID). We estimated odds ratios and heritability of ASD with ID (ASD+ID) and ASD without ID (ASD−ID) using register‐based diagnosis data of 567,436 index persons born in 1984–2009 in Stockholm County, Sweden, and their parents, siblings, cousins, aunts, and uncles. The familial risk profile exhibited differences between ASD−ID and ASD+ID, most notably for index persons with affected parents. For example, for an index person who had at least one parent with ASD, the child's odds of ASD−ID and ASD+ID (95% confidence interval (CI)) increased by 16.2 (14.2–18.6) and 7.4 (5.5–10.0) folds, respectively. The more closely related a family member with ASD was, the greater the observed risk was of ASD in the index person, especially for ASD−ID. The broad‐sense heritability (95% CI) for ASD − ID and ASD+ID were 64.6% (46.0–100.0%) and 33.4% (14.4–58.4%), respectively. Familial risk and heritability of ASD may vary by intellectual ability, which implies that risk factors between these ASD phenotypes may differ. Our findings from the heritability analysis and familial risk analysis suggest that ASD−ID may have a greater genetic basis than ASD+ID, although this should be verified in future studies. Lay Summary Autism spectrum disorder (ASD) is highly heritable, yet how its familial risk and heritability may vary by cognitive ability is not well‐understood. In a population‐based cohort study on families of 567,436 index persons using Swedish registers data, we found that the familial risk profile differed between ASD with and without intellectual disability. Our findings from the heritability analysis and familial risk analysis suggest that ASD−ID may have a greater genetic basis than ASD+ID, although this should be verified in future studies.
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Affiliation(s)
- Sherlly Xie
- Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, Pennsylvania, USA
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Christina Dalman
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden.,Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Linnea Widman
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Dheeraj Rai
- Population Health Sciences, Bristol Medical School, Bristol, UK.,Avon and Wiltshire Mental Health Partnership NHS Trust, Bristol, UK
| | - Renee M Gardner
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Cecilia Magnusson
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden.,Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Sven Sandin
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Seaver Autism Center for Research and Treatment at Mount Sinai, New York, New York, USA.,Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Loni P Tabb
- Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, Pennsylvania, USA
| | - Craig J Newschaffer
- Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, Pennsylvania, USA.,A. J. Drexel Autism Institute, Philadelphia, Pennsylvania, USA
| | - Brian K Lee
- Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, Pennsylvania, USA.,Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden.,A. J. Drexel Autism Institute, Philadelphia, Pennsylvania, USA
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15
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Gardner RM, Dalman C, Rai D, Lee BK, Karlsson H. The Association of Paternal IQ With Autism Spectrum Disorders and Its Comorbidities: A Population-Based Cohort Study. J Am Acad Child Adolesc Psychiatry 2020; 59:410-421. [PMID: 31026573 DOI: 10.1016/j.jaac.2019.04.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/09/2019] [Accepted: 04/17/2019] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Original case descriptions of autism noted that parents of the affected children tended to be highly educated and intelligent, a characterization that has endured publicly. Recent genetic studies indicate that risk for autism spectrum disorders (ASD) is associated with high intelligence. We examined the association between paternal intelligence and ASD, considering co-occurring intellectual disability (ID) and attention-deficit/hyperactivity disorder (ADHD). METHOD We used a register-based cohort study design including 360,151 individuals with fathers conscripted to the Swedish military, resident in Stockholm, Sweden, born from 1984 to 2008, and followed until December 31, 2011, for diagnosis of ASD, ADHD, and/or ID. Risk of neurodevelopmental disorders relative to paternal IQ (rated on a 9-point scale) was assessed using a score of 5 (average intelligence) as the referent in models accounting for potentially nonlinear relationships and clustering of siblings. RESULTS We observed an association between high paternal IQ and offspring risk of ASD without ID/ADHD in models adjusted for individual and family characteristics (ORIQ=9 1.32, 95% CI 1.15-1.52), an association that appeared to be driven largely by the fathers' score on the technical comprehension portion of the test (ORTechnical IQ = 9 1.53, 95% CI 1.31-1.78). Conversely, low paternal IQ was associated with ASD+ID (ORIQ = 11.78, 95% CI 1.27-2.49) and ASD+ADHD (ORIQ = 11.40, 95% CI 1.16-1.70); low paternal IQ was strongly associated with ID (ORIQ = 1 4.46, 95% CI 3.62-5.49) and present also for ADHD (ORIQ = 11.56, 95% CI 1.42-1.72)] without co-occurring ASD or ID. CONCLUSION The relationship between paternal IQ and offspring risk of ASD was nonmonotonic and varied by the presence of co-occurring disorders, probably reflecting phenotypic diversity among affected individuals.
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Affiliation(s)
| | - Christina Dalman
- Karolinska Institutet, Stockholm, Sweden; Centre for Epidemiology and Community Medicine of the Stockholm County Council, Stockholm, Sweden
| | - Dheeraj Rai
- Centre for Academic Mental Health, School of Social and Community Medicine, University of Bristol, UK
| | - Brian K Lee
- Dornsife School of Public Health, Drexel University, Philadelphia, PA
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16
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Abstract
IMPORTANCE Given the critical role that iron plays in neurodevelopment, an association between prenatal iron deficiency and later risk of neurodevelopmental disorders, such as autism spectrum disorder (ASD), attention-deficit/hyperactivity disorder (ADHD), and intellectual disability (ID), is plausible. OBJECTIVE To test the a priori hypothesis that anemia diagnosed in mothers during pregnancy is associated with an increased risk of ASD, ADHD, and ID in offspring and that the magnitude of the risk varies with regard to the timing of anemia in pregnancy. DESIGN, SETTING, AND PARTICIPANTS This cohort study used health and population register data from the Stockholm Youth Cohort to evaluate 532 232 nonadoptive children born from January 1, 1987, to December 31, 2010, in Sweden, with follow-up in health registers until December 31, 2016. Data analysis was performed from January 15, 2018, to June 20, 2018. EXPOSURES Registered diagnoses of anemia during pregnancy. Gestational timing of the first recorded anemia diagnosis (≤30 weeks or >30 weeks) was considered to assess potential critical windows of development. MAIN OUTCOMES AND MEASURES Registered diagnoses of ASD, ADHD, or ID or co-occurring combinations of these disorders. RESULTS The cohort included 532 232 individuals (272 884 [51.3%] male) between 6 and 29 years of age at the end of follow-up (mean [SD] age, 17.6 [7.1] years) and their 299 768 mothers. The prevalence of ASD, ADHD, and ID was higher among children born to mothers diagnosed with anemia within the first 30 weeks of pregnancy (4.9% ASD, 9.3% ADHD, and 3.1% ID) compared with mothers with anemia diagnosed later in pregnancy (3.8% ASD, 7.2% ADHD, and 1.1% ID) or mothers not diagnosed with anemia (3.5% ASD, 7.1% ADHD, and 1.3% ID). Anemia diagnosed during the first 30 weeks of pregnancy but not later was associated with increased risk of diagnosis of ASD (odds ratio [OR], 1.44; 95% CI, 1.13-1.84), ADHD (OR, 1.37; 95% CI, 1.14-1.64), and ID (OR, 2.20; 95% CI, 1.61-3.01) in offspring in models that included socioeconomic, maternal, and pregnancy-related factors. Early anemia diagnosis was similarly associated with risk of ASD (OR, 2.25; 95% CI, 1.24-4.11) and ID (OR, 2.59; 95% CI, 1.08-6.22) in a matched sibling comparison. Considering mutually exclusive diagnostic groups, we observed the strongest association between anemia and ID without co-occurring ASD (OR, 2.72; 95% CI, 1.84-4.01). Associations of these disorders with anemia diagnosed later in pregnancy were greatly diminished. CONCLUSIONS AND RELEVANCE In contrast to maternal anemia diagnosed toward the end of pregnancy, anemia diagnosed earlier in pregnancy was associated with increased risk of the development of ASD, ADHD, and particularly ID in offspring. Given that iron deficiency and anemia are common among women of childbearing age, our findings emphasize the importance of early screening for iron status and nutritional counseling in antenatal care.
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Affiliation(s)
| | - Christina Dalman
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden,Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Brian K. Lee
- Department of Epidemiology and Biostatistics, Drexel University Dornsife School of Public Health, Philadelphia, Pennsylvania,A. J. Drexel Autism Institute, Philadelphia, Pennsylvania
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Renee M. Gardner
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
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Karlsson H, Dal H, Gardner RM, Torrey EF, Dalman C. Birth month and later diagnosis of schizophrenia. A population-based cohort study in Sweden. J Psychiatr Res 2019; 116:1-6. [PMID: 31170611 DOI: 10.1016/j.jpsychires.2019.05.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/10/2019] [Accepted: 05/27/2019] [Indexed: 10/26/2022]
Abstract
The objective of the present study was to examine if the monthly variation in births of individuals diagnosed with schizophrenia currently differs from that of unaffected individuals in Sweden. In an extensive linkage of Swedish national and regional population registers we here investigate the birth pattern of the population born 1940-97 (5,995,499 individuals) which included 30,684 individuals diagnosed with schizophrenia in the National Patient Register by December 31, 2016. Among 2,409,862 individuals born since 1973 we investigated potential confounding by co-variates associated with pregnancy and birth. We also compared the monthly birth pattern of 22,570 affected individuals to that of their 41,528 unaffected full siblings. We observe a significant birth excess of individuals with schizophrenia in December, HR 1.07 95%CI (1.01-1.13). Patients born in December received a registered diagnosis of schizophrenia at a slightly younger age than those born during other months. A number of co-variates were associated not only with schizophrenia but also varied across birth months. Inclusion of these in the models however had virtually no influence on the risk for schizophrenia associated with December birth. In comparisons between full siblings, the association between December birth and later diagnosis of schizophrenia remained, albeit slightly attenuated, HR 1.06 (0.99-1.12). Risk for schizophrenia associated with birth in December in Sweden during the study period does not appear to be fully explained by our investigated co-variates or factors shared between family members and may thus represent monthly/seasonal variation in environmental factors involved in the etiology of schizophrenia.
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Affiliation(s)
- Hakan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden.
| | - Henrik Dal
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Renee M Gardner
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | | | - Christina Dalman
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
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Xie S, Karlsson H, Dalman C, Widman L, Rai D, Gardner RM, Magnusson C, Schendel DE, Newschaffer CJ, Lee BK. Family History of Mental and Neurological Disorders and Risk of Autism. JAMA Netw Open 2019; 2:e190154. [PMID: 30821823 PMCID: PMC6484646 DOI: 10.1001/jamanetworkopen.2019.0154] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
IMPORTANCE Familial aggregation of mental and neurological disorders is often observed in autism spectrum disorders (ASD), but reports have generally focused on single disorders and are limited to first-degree relatives. OBJECTIVES To examine family history of mental and neurological disorders among first- to fourth-degree relatives and risk of ASD with and without intellectual disability (ID) in index persons. DESIGN, SETTING, AND PARTICIPANTS In this population-based cohort study, 567 436 index persons were identified from the Stockholm Youth Cohort, an ongoing longitudinal register-linkage cohort study of the total population aged 0 to 17 years residing in Stockholm County, Sweden. Index persons were nonadopted singleton births born between 1984 and 2009 who were at least 2 years of age at the end of follow-up on December 31, 2011, had resided in Stockholm County for at least 2 years since birth, and could be linked to both biological parents. Data analysis was conducted from May 2017 to December 2018. EXPOSURE Mental and neurological diagnoses of relatives of the index persons. MAIN OUTCOMES AND MEASURES Diagnosis of ASD, with or without co-occurring ID, in the index persons. RESULTS The cohort included 567 436 index persons (291 191 [51.3%] male; mean [SD] age at the end of follow-up, 14.3 [7.5] years). The prevalence of ASD with and without ID was 0.4% and 1.5%, respectively. Positive family history of mental and neurological disorders was associated with higher odds of ASD in index persons; 6895 (63.1%) of index persons with ASD had a parent with history of mental and/or neurological disorders, compared with 252 454 (45.4%) of index persons without ASD. Family history of multiple disorders was associated with higher odds of ASD in index persons, including history of ASD (odds ratio among first-degree relatives for ASD with and without ID: 14.2, 9.0), intellectual disability (7.6, 2.3), attention-deficit/hyperactivity disorder (3.3, 4.7), obsessive compulsive disorder (1.9, 2.1), schizophrenia and other nonaffective psychotic disorders (2.1, 1.8), depression (1.4, 2.0), bipolar disorder (1.4, 2.2), personality disorder (2.1, 2.6), cerebral palsy (2.2, 1.5), and epilepsy (2.0, 1.3). The more closely related the affected family member was, the higher the odds was of ASD for the index person. ASD without intellectual disability was associated with more disorders compared to ASD with intellectual disability. ASD with intellectual disability exhibited a weaker familial association with other mental disorder diagnoses but a stronger familial association with some neurological diagnoses as compared to ASD without intellectual disability. CONCLUSIONS AND RELEVANCE This study suggests that family history of mental and neurological disorders is associated with increased risk of ASD. The familial component of ASD etiology may differ by presence or absence of co-occurring ID.
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Affiliation(s)
- Sherlly Xie
- Drexel University School of Public Health, Philadelphia, Pennsylvania
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Christina Dalman
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
- Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Linnea Widman
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Dheeraj Rai
- Centre for Academic Mental Health, Bristol Medical School, University of Bristol, Bristol, United Kingdom
- Avon and Wiltshire Partnership National Health Service Mental Health Trust, Bath, United Kingdom
| | - Renee M. Gardner
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Cecilia Magnusson
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
- Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Diana E. Schendel
- Department of Public Health, University of Aarhus, Aarhus, Denmark
- Department of Economics and Business Economics, University of Aarhus, Aarhus, Denmark
- Lundbeck Foundation Initiative for Integrative Psychiatric Research, University of Aarhus, Aarhus, Denmark
| | - Craig J. Newschaffer
- Drexel University School of Public Health, Philadelphia, Pennsylvania
- A. J. Drexel Autism Institute, Philadelphia, Pennsylvania
| | - Brian K. Lee
- Drexel University School of Public Health, Philadelphia, Pennsylvania
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
- A. J. Drexel Autism Institute, Philadelphia, Pennsylvania
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Cooper JD, Ozcan S, Gardner RM, Rustogi N, Wicks S, van Rees GF, Leweke FM, Dalman C, Karlsson H, Bahn S. Schizophrenia-risk and urban birth are associated with proteomic changes in neonatal dried blood spots. Transl Psychiatry 2017; 7:1290. [PMID: 29249827 PMCID: PMC5802534 DOI: 10.1038/s41398-017-0027-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 07/12/2017] [Accepted: 08/20/2017] [Indexed: 12/22/2022] Open
Abstract
In the present study, we tested whether there were proteomic differences in blood between schizophrenia patients after the initial onset of the disorder and controls; and whether those differences were also present at birth among neonates who later developed schizophrenia compared to those without a psychiatric admission. We used multiple reaction monitoring mass spectrometry to quantify 77 proteins (147 peptides) in serum samples from 60 first-onset drug-naive schizophrenia patients and 77 controls, and 96 proteins (152 peptides) in 892 newborn blood-spot (NBS) samples collected between 1975 and 1985. Both serum and NBS studies showed significant alterations in protein levels. Serum results revealed that Haptoglobin and Plasma protease C1 inhibitor were significantly upregulated in first-onset schizophrenia patients (corrected P < 0.05). Alpha-2-antiplasmin, Complement C4-A and Antithrombin-III were increased in first-onset schizophrenia patients (uncorrected P-values 0.041, 0.036 and 0.013, respectively) and also increased in newborn babies who later develop schizophrenia (P-values 0.0058, 0.013 and 0.044, respectively). We also tested whether protein abundance at birth was associated with exposure to an urban environment during pregnancy and found highly significant proteomic differences at birth between urban and rural environments. The prediction model for urbanicity had excellent predictive performance in both discovery (area under the receiver operating characteristic curve (AUC) = 0.90) and validation (AUC = 0.89) sample sets. We hope that future biomarker studies based on stored NBS samples will identify prognostic disease indicators and targets for preventive measures for neurodevelopmental conditions, particularly those with onset during early childhood, such as autism spectrum disorder.
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Affiliation(s)
- Jason D. Cooper
- 0000000121885934grid.5335.0Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Sureyya Ozcan
- 0000000121885934grid.5335.0Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Renee M. Gardner
- 0000 0004 1937 0626grid.4714.6Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Nitin Rustogi
- 0000000121885934grid.5335.0Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Susanne Wicks
- 0000 0004 1937 0626grid.4714.6Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden ,0000 0001 2326 2191grid.425979.4Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Geertje F. van Rees
- 0000000121885934grid.5335.0Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - F. Markus Leweke
- 0000 0004 1936 834Xgrid.1013.3Brain and Mind Centre, University of Sydney, Sydney, Australia
| | - Christina Dalman
- 0000 0004 1937 0626grid.4714.6Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden ,0000 0001 2326 2191grid.425979.4Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Håkan Karlsson
- 0000 0004 1937 0626grid.4714.6Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Sabine Bahn
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK.
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Kosidou K, Dalman C, Widman L, Arver S, Lee BK, Magnusson C, Gardner RM. Maternal Polycystic Ovary Syndrome and Risk for Attention-Deficit/Hyperactivity Disorder in the Offspring. Biol Psychiatry 2017; 82:651-659. [PMID: 27889187 DOI: 10.1016/j.biopsych.2016.09.022] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 09/09/2016] [Accepted: 09/21/2016] [Indexed: 12/16/2022]
Abstract
BACKGROUND Attention-deficit/hyperactivity disorder (ADHD) is the most common childhood neurodevelopmental disorder, and boys are two to three times more likely to develop ADHD. Maternal polycystic ovary syndrome (PCOS), a common metabolic disorder associated with excess circulating androgens, has been associated with increased risk for autism spectrum disorder in the offspring. In this study, we aimed to investigate whether maternal PCOS increases the risk for ADHD in the offspring. METHODS We conducted a matched case-control study using health and population data registers for all children born in Sweden from 1984 to 2008. Maternal PCOS was defined by ICD-coded register diagnosis. The outcome of ADHD was defined as an ICD-coded register diagnosis of ADHD and/or registered prescription of medications to treat ADHD. A total of 58,912 ADHD cases (68.8% male) were identified and matched to 499,998 unaffected controls by sex and birth month and year. RESULTS Maternal PCOS increased the odds of offspring ADHD by 42% after adjustment for confounders (odds ratio [OR], 1.42; 95% confidence interval [CI], 1.26-1.58). Exclusion of ADHD cases with comorbid autism spectrum disorder attenuated but did not explain the relationship (OR, 1.34; 95% CI, 1.18-1.52). The risk was somewhat elevated for ADHD with comorbid autism spectrum disorder (OR, 1.76; 95% CI, 1.37-2.26). The risk for ADHD was higher among obese mothers with PCOS (OR, 1.68; 95% CI, 1.31-2.17) and was highest among obese mothers with PCOS and other features of metabolic syndrome (OR, 2.59; 95% CI, 1.02-6.58). CONCLUSIONS This study provides evidence that maternal PCOS may subtly influence the neurodevelopment of the offspring, resulting in increased risk for neurodevelopmental disorders such as ADHD.
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Affiliation(s)
- Kyriaki Kosidou
- Centre for Epidemiology and Community Medicine, Stockholm County Council, Karolinska Institutet, Stockholm, Sweden; Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Christina Dalman
- Centre for Epidemiology and Community Medicine, Stockholm County Council, Karolinska Institutet, Stockholm, Sweden; Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Linnea Widman
- Centre for Epidemiology and Community Medicine, Stockholm County Council, Karolinska Institutet, Stockholm, Sweden; Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Stefan Arver
- Division of Public Health Epidemiology, and Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Brian K Lee
- Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, Pennsylvania; A.J. Drexel Autism Institute, Philadelphia, Pennsylvania
| | - Cecilia Magnusson
- Centre for Epidemiology and Community Medicine, Stockholm County Council, Karolinska Institutet, Stockholm, Sweden; Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Renee M Gardner
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden.
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DeVilbiss EA, Magnusson C, Gardner RM, Rai D, Newschaffer CJ, Lyall K, Dalman C, Lee BK. Antenatal nutritional supplementation and autism spectrum disorders in the Stockholm youth cohort: population based cohort study. BMJ 2017; 359:j4273. [PMID: 28978695 PMCID: PMC6168830 DOI: 10.1136/bmj.j4273] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Objective To determine whether nutritional supplementation during pregnancy is associated with a reduced risk of autism spectrum disorder (ASD) with and without intellectual disability in offspring.Design Observational prospective cohort study using multivariable logistic regression, sibling controls, and propensity score matching.Setting Stockholm County, Sweden.Participants 273 107 mother-child pairs identified through population registers. The study sample was restricted to children who were aged 4 to 15 years by the end of follow-up on 31 December 2011 and were born between 1996 and 2007.Exposures Multivitamin, iron, and folic acid supplement use was reported at the first antenatal visit.Main outcome measure Diagnosis of ASD with and without intellectual disability in children determined from register data up to 31 December 2011.Results Prevalence of ASD with intellectual disability was 0.26% (158 cases in 61 934) in the maternal multivitamin use group and 0.48% (430 cases in 90 480) in the no nutritional supplementation use group. Maternal multivitamin use with or without additional iron or folic acid, or both was associated with lower odds of ASD with intellectual disability in the child compared with mothers who did not use multivitamins, iron, and folic acid (odds ratio 0.69, 95% confidence interval 0.57 to 0.84). Similar estimates were found in propensity score matched (0.68, 0.54 to 0.86) and sibling control (0.77, 0.52 to 1.15) matched analyses, though the confidence interval for the latter association included 1.0 and was therefore not statistically significant. There was no consistent evidence that either iron or folic acid use were inversely associated with ASD prevalence.Conclusions Maternal multivitamin supplementation during pregnancy may be inversely associated with ASD with intellectual disability in offspring. Further scrutiny of maternal nutrition and its role in the cause of autism is recommended.
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Affiliation(s)
- Elizabeth A DeVilbiss
- Department of Epidemiology and Biostatistics, Dornsife School of Public Health, Drexel University, 3215 Market St, Philadelphia, PA, 19104, USA
| | - Cecilia Magnusson
- Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Renee M Gardner
- Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Dheeraj Rai
- Centre for Academic Mental Health, School of Social and Community Medicine, University of Bristol, Bristol, UK
| | - Craig J Newschaffer
- Department of Epidemiology and Biostatistics, Dornsife School of Public Health, Drexel University, 3215 Market St, Philadelphia, PA, 19104, USA
- AJ Drexel Autism Institute, Philadelphia, PA, USA
| | | | - Christina Dalman
- Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Brian K Lee
- Department of Epidemiology and Biostatistics, Dornsife School of Public Health, Drexel University, 3215 Market St, Philadelphia, PA, 19104, USA
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Lee BK, Arver S, Widman L, Gardner RM, Magnusson C, Dalman C, Kosidou K. Maternal hirsutism and autism spectrum disorders in offspring. Autism Res 2017; 10:1544-1546. [DOI: 10.1002/aur.1797] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 02/24/2017] [Accepted: 03/20/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Brian K. Lee
- Department of Epidemiology and Biostatistics; Drexel University School of Public Health, 3215 Market St; Philadelphia PA 19104
- A.J. Drexel Autism Institute, 3020 Market St; Philadelphia PA 19104
| | - Stefan Arver
- Department of Medicine; Huddinge, Karolinska Institutet; Stockholm 14186 Sweden
| | - Linnea Widman
- Centre for Epidemiology and Community Medicine; Stockholm County Council; Stockholm 17129 Sweden
- Department of Public Health Sciences; Division of Public Health Epidemiology, Karolinska Institutet; Stockholm 17177 Sweden
| | - Renee M. Gardner
- Department of Public Health Sciences; Division of Public Health Epidemiology, Karolinska Institutet; Stockholm 17177 Sweden
| | - Cecilia Magnusson
- Centre for Epidemiology and Community Medicine; Stockholm County Council; Stockholm 17129 Sweden
- Department of Public Health Sciences; Division of Public Health Epidemiology, Karolinska Institutet; Stockholm 17177 Sweden
| | - Christina Dalman
- Centre for Epidemiology and Community Medicine; Stockholm County Council; Stockholm 17129 Sweden
- Department of Public Health Sciences; Division of Public Health Epidemiology, Karolinska Institutet; Stockholm 17177 Sweden
| | - Kyriaki Kosidou
- Centre for Epidemiology and Community Medicine; Stockholm County Council; Stockholm 17129 Sweden
- Department of Public Health Sciences; Division of Public Health Epidemiology, Karolinska Institutet; Stockholm 17177 Sweden
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Mackay E, Dalman C, Karlsson H, Gardner RM. Association of Gestational Weight Gain and Maternal Body Mass Index in Early Pregnancy With Risk for Nonaffective Psychosis in Offspring. JAMA Psychiatry 2017; 74:339-349. [PMID: 28241183 DOI: 10.1001/jamapsychiatry.2016.4257] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
IMPORTANCE Prenatal exposure to famine is associated with a 2-fold risk for nonaffective psychoses. Less is known about whether maternal nutrition states during pregnancy modify offspring risk for nonaffective psychoses in offspring in well-fed populations. OBJECTIVE To determine whether gestational weight gain (GWG) during pregnancy and maternal body mass index (BMI) in early pregnancy are associated with risk for nonaffective psychoses in offspring. DESIGN, SETTING AND PARTICIPANTS This population-based cohort study used data from Swedish health and population registers to follow up 526 042 individuals born from January 1, 1982, through December 31, 1989, from 13 years of age until December 31, 2011. Cox proportional hazards regression models adjusted for socioeconomic status and potential risk factors were used to examine the risk for developing nonaffective psychoses. Family-based study designs were used to further test causality. Data were analyzed from February 1 to May 14, 2016. EXPOSURES Gestational weight gain during pregnancy, maternal body mass index at the first antenatal visit, and paternal body mass index at the time of conscription into the Swedish military (at 18 years of age). MAIN OUTCOMES AND MEASURES Hazard ratios (HRs) for the diagnosis of nonaffective psychoses (International Statistical Classification of Diseases and Related Health Problems, Tenth Revision [ICD-10] codes F20 to F29 and International Classification of Diseases, Ninth Revision [ICD-9] codes 295, 297 and 298, except 298A and 298B) and narrowly defined schizophrenia (ICD-9 code 295 and ICD-10 code F20). RESULTS The 526 042 individuals in the cohort (48.52% female and 51.47% male; mean [SD] age, 26 [2.3] years) included 2910 persons with nonaffective psychoses at the end of follow-up, of whom 704 had narrowly defined schizophrenia. Among the persons with nonaffective psychosis, 184 (6.32%) had mothers with extremely inadequate GWG (<8 kg for mothers with normal baseline BMI), compared with 23 627 (4.52%) of unaffected individuals. Extremely inadequate GWG was associated with an increased risk for nonaffective psychoses among offspring in adjusted models (HR, 1.32; 95% CI, 1.13-1.54) and in matched-sibling analysis (HR, 1.61; 95% CI, 1.02-2.56). Similar patterns were observed when considering narrowly defined schizophrenia as the outcome. Maternal mild thinness in early pregnancy was weakly associated with an increased risk for nonaffective psychosis in offspring (HR for BMI≥17.0 and <18.5, 1.21; 95% CI, 1.01-1.45), as was paternal severe thinness (HR for BMI<16.0, 2.53; 95% CI, 1.26-5.07) in mutually adjusted models. In matched-sibling analysis, no association was observed between maternal underweight (HR, 1.46; 95% CI, 0.90-2.35), overweight (HR, 1.11; 95% CI, 0.73-1.68), or obesity (HR, 0.56; 95% CI, 0.23-1.38) and risk for nonaffective psychosis in offspring. CONCLUSIONS AND RELEVANCE Inadequate GWG was associated with an increased risk for nonaffective psychosis in offspring, consistent with historical studies on maternal starvation. These findings support the role of maternal undernutrition in nonaffective psychosis pathogenesis.
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Affiliation(s)
- Euan Mackay
- Epidemiology of Mental Health Division, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Christina Dalman
- Epidemiology of Mental Health Division, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden2Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Renee M Gardner
- Epidemiology of Mental Health Division, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
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Abstract
OBJECTIVES To review the history of clinical information systems over the past twenty-five years and project anticipated changes to those systems over the next twenty-five years. METHODS Over 250 Medline references about clinical information systems, quality of patient care, and patient safety were reviewed. Books, Web resources, and the author's personal experience with developing the HELP system were also used. RESULTS There have been dramatic improvements in the use and acceptance of clinical computing systems and Electronic Health Records (EHRs), especially in the United States. Although there are still challenges with the implementation of such systems, the rate of progress has been remarkable. Over the next twenty-five years, there will remain many important opportunities and challenges. These opportunities include understanding complex clinical computing issues that must be studied, understood and optimized. Dramatic improvements in quality of care and patient safety must be anticipated as a result of the use of clinical information systems. These improvements will result from a closer involvement of clinical informaticians in the optimization of patient care processes. CONCLUSIONS Clinical information systems and computerized clinical decision support have made contributions to medicine in the past. Therefore, by using better medical knowledge, optimized clinical information systems, and computerized clinical decision, we will enable dramatic improvements in both the quality and safety of patient care in the next twenty-five years.
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Affiliation(s)
- R M Gardner
- Reed M. Gardner, PhD, Professor Emeritus, Department of Biomedical Informatics, University of Utah, 1745 Cornell Circle (Home Address), Salt Lake City, UT 84108, Tel: +1 801 581 1164, Cell: +1 801 455 8207, E-mail:
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Gardner RM, Lee BK, Magnusson C, Rai D, Frisell T, Karlsson H, Idring S, Dalman C. Maternal body mass index during early pregnancy, gestational weight gain, and risk of autism spectrum disorders: Results from a Swedish total population and discordant sibling study. Int J Epidemiol 2015; 44:870-83. [PMID: 26045508 PMCID: PMC4521130 DOI: 10.1093/ije/dyv081] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Prenatal environmental factors such as maternal adiposity may influence the risk of offspring autism spectrum disorders (ASD), though current evidence is inconsistent. The objective of this study was to assess the relationship of parental BMI and gestational weight gain (GWG) with risk of offspring ASD in a population-based cohort study using family-based study designs. METHODS The cohort was based in Stockholm County, Sweden, including 333,057 individuals born 1984-2007, of whom 6420 were diagnosed with an ASD. We evaluated maternal body mass index (BMI) at first antenatal visit, GWG and paternal BMI at the time of conscription into the Swedish military as exposures using general estimating equation (GEE) models with logit link. RESULTS At the population level, maternal overweight/obesity was associated with increased risk of offspring ASD [odds ratio (OR)25 ≤ BMI < 30 1.31, 95% confidence interval = 1.21-1.41; ORBMI ≥ 30 1.94, 1.72-2.17], as was paternal underweight (ORBMI < 18.5, 1.19, 1.06-1.33) and obesity (ORBMI ≥ 30 1.47, 1.12-1.92) in mutually adjusted models. However, in matched sibling analyses, the relationship between elevated maternal BMI and ASD risk was not apparent. GWG had a U-shaped association with offspring ASD at the population level (ORinsufficient 1.22, 1.07-1.40; ORexcessive 1.23, 1.08-1.40). Matched sibling analyses were suggestive of elevated risk with excessive GWG (ORinsufficient 1.12, 0.68-1.84; ORexcessive 1.48, 0.93-2.38). CONCLUSIONS Whereas population-level results suggested that maternal BMI was associated with ASD, sibling analyses and paternal BMI analyses indicate that maternal BMI may also be a proxy marker for other familial risk factors. Evidence is stronger for a direct link between GWG and ASD risk.
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Affiliation(s)
- Renee M Gardner
- Department of Public Health Sciences, and Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden,
| | - Brian K Lee
- Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, PA, USA, A.J. Drexel Autism Institute, Philadelphia, PA, USA
| | - Cecilia Magnusson
- Department of Public Health Sciences, and Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Dheeraj Rai
- School of Social and Community Medicine, University of Bristol, Bristol, UK, Avon and Wiltshire Partnership NHS Mental Health Trust, Bristol, UK
| | - Thomas Frisell
- Department of Medicine, Karolinska Institutet, Stockholm, Sweden and
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Selma Idring
- Department of Public Health Sciences, and Neurodevelopmental Psychiatry Unit, Child and Youth Psychiatry, Stockholm County Council, Stockholm, Sweden
| | - Christina Dalman
- Department of Public Health Sciences, and Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
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Blomström Å, Gardner RM, Dalman C, Yolken RH, Karlsson H. Influence of maternal infections on neonatal acute phase proteins and their interaction in the development of non-affective psychosis. Transl Psychiatry 2015; 5:e502. [PMID: 25646591 PMCID: PMC4445745 DOI: 10.1038/tp.2014.142] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 11/24/2014] [Indexed: 11/24/2022] Open
Abstract
Although primary infections with Toxoplasma gondii or herpes viruses during pregnancy are established teratogens, chronic maternal infections with these pathogens are considered far less serious. However, such chronic infections have been associated with neuropsychiatric disorders in the offspring. The risks of non-affective psychoses, including schizophrenia, in offspring associated with these exposures during pregnancy have not been completely defined. We used data from neonatal dried blood samples from 199 cases of non-affective psychosis and 525 matched controls (born 1975-1985). We measure immunoglobulin G antibodies directed at T. gondii, cytomegalovirus and herpes simplex virus type-1 and -2, as well as levels of nine acute phase proteins (APPs). We assessed the interaction between maternal antibodies and neonatal APP in terms of risk of non-affective psychosis. Among controls, maternal exposure to T. gondii or cytomegalovirus, but not to the other herpes viruses, was associated with significantly higher levels of neonatal APPs. Among cases, none of the maternal exposures were associated with any significant change in APPs. We observed increased RR for non-affective psychosis associated with maternal infection with T. gondii (odds ratio 2.1, 95% confidence interval 1.1-4.0) or cytomegalovirus (1.7, 0.9-3.3) only among neonates with low APP levels. These findings suggest that chronic maternal infection with T. gondii or cytomegalovirus affect neonatal markers of innate immunity. Deficient fetal immune responses in combination with maternal chronic infections may contribute to subsequent risk for psychosis. A greater understanding of the maternal-fetal immunological interplay may ultimately lead to preventive strategies toward neuropsychiatric disorders.
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Affiliation(s)
- Å Blomström
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden,Department of Public Health Sciences, Karolinska Institutet, Tomtebodavägen 18A, Stockholm 171 76, Sweden. E-mail:
| | - R M Gardner
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - C Dalman
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - R H Yolken
- Stanley Division of Developmental Neurovirology, Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - H Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
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Lee BK, Magnusson C, Gardner RM, Blomström Å, Newschaffer CJ, Burstyn I, Karlsson H, Dalman C. Maternal hospitalization with infection during pregnancy and risk of autism spectrum disorders. Brain Behav Immun 2015; 44:100-5. [PMID: 25218900 PMCID: PMC4418173 DOI: 10.1016/j.bbi.2014.09.001] [Citation(s) in RCA: 217] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 08/15/2014] [Accepted: 09/02/2014] [Indexed: 12/27/2022] Open
Abstract
Animal models indicate that maternal infection during pregnancy can result in behavioral abnormalities and neuropathologies in offspring. We examined the association between maternal inpatient diagnosis with infection during pregnancy and risk of ASD in a Swedish nationwide register-based birth cohort born 1984-2007 with follow-up through 2011. In total, the sample consisted of 2,371,403 persons with 24,414 ASD cases. Infection during pregnancy was defined from ICD codes. In the sample, 903 mothers of ASD cases (3.7%) had an inpatient diagnosis of infection during pregnancy. Logistic regression models adjusted for a number of covariates yielded odds ratios indicating approximately a 30% increase in ASD risk associated with any inpatient diagnosis of infection. Timing of infection did not appear to influence risk in the total Swedish population, since elevated risk of ASD was associated with infection in all trimesters. In a subsample analysis, infections were associated with greater risk of ASD with intellectual disability than for ASD without intellectual disability. The present study adds to the growing body of evidence, encompassing both animal and human studies, that supports possible immune-mediated mechanisms underlying the etiology of ASD.
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Affiliation(s)
- Brian K. Lee
- Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, PA, USA,A.J. Drexel Autism Institute, Philadelphia, PA, USA
| | - Cecilia Magnusson
- Division of Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Renee M. Gardner
- Division of Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden,Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Åsa Blomström
- Division of Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
| | - Craig J. Newschaffer
- Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, PA, USA,A.J. Drexel Autism Institute, Philadelphia, PA, USA
| | - Igor Burstyn
- A.J. Drexel Autism Institute, Philadelphia, PA, USA,Department of Environmental and Occupational Health, Drexel University School of Public Health, Philadelphia, PA, USA
| | - Håkan Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Christina Dalman
- Division of Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
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Gardner RM, Kippler M, Tofail F, Bottai M, Hamadani J, Grandér M, Nermell B, Palm B, Rasmussen KM, Vahter M. Environmental exposure to metals and children's growth to age 5 years: a prospective cohort study. Am J Epidemiol 2013; 177:1356-67. [PMID: 23676282 PMCID: PMC3676155 DOI: 10.1093/aje/kws437] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In this prospective cohort study, based on 1,505 mother-infant pairs in rural Bangladesh, we evaluated the associations between early-life exposure to arsenic, cadmium, and lead, assessed via concentrations in maternal and child urine, and children's weights and heights up to age 5 years, during the period 2001–2009. Concurrent and prenatal exposures were evaluated using linear regression analysis, while longitudinal exposure was assessed using mixed-effects linear regression. An inverse association was found between children's weight and height, age-adjusted z scores, and growth velocity at age 5 years and concurrent exposure to cadmium and arsenic. In the longitudinal analysis, multivariable-adjusted attributable differences in children's weight at age 5 years were −0.33 kg (95% confidence interval (CI): −0.60, −0.06) for high (≥95th percentile) arsenic exposure and −0.57 kg (95% CI: −0.88, −0.26) for high cadmium exposure, in comparison with children with the lowest exposure (≤5th percentile). Multivariable-adjusted attributable differences in height were −0.50 cm (95% CI: −1.20, 0.21) for high arsenic exposure and −1.6 cm (95% CI: −2.4, −0.77) for high cadmium exposure. The associations were apparent primarily among girls. The negative effects on children's growth at age 5 years attributable to arsenic and cadmium were of similar magnitude to the difference between girls and boys in terms of weight (−0.67 kg, 95% CI: −0.82, −0.53) and height (−1.3 cm, 95% CI: −1.7, −0.89).
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Marie Vahter
- Correspondence to Dr. Marie Vahter, Institute of Environmental Medicine, Karolinska Institutet, Box 210, 171 77 Stockholm, Sweden (e-mail: )
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Gardner RM, Dalman C, Wicks S, Lee BK, Karlsson H. Neonatal levels of acute phase proteins and later risk of non-affective psychosis. Transl Psychiatry 2013; 3:e228. [PMID: 23423137 PMCID: PMC3591005 DOI: 10.1038/tp.2013.5] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 01/03/2013] [Indexed: 12/26/2022] Open
Abstract
Mounting evidence suggests that immune disturbances in early life may be implicated in the etiology of non-affective psychoses. Our aim was to assess the levels of neonatal acute phase proteins (APPs), central to innate immune function as well as central nervous system development, in neonatal dried blood spots and their association with later risk of non-affective psychoses. This case-control study included 196 individuals with a verified register-based diagnosis of non-affective psychosis and 502 controls matched on age, sex and hospital of birth. Concentrations of nine different APPs were measured in eluates from dried blood spots using a bead-based multiplex assay. Odds ratios (OR) for non-affective psychoses were calculated for log(2)-transformed (continuous) as well as tertiles of APP concentrations. In continuous analysis, higher concentrations of two APPs, tissue plasminogen activator (tPA; OR: 0.90, 95% confidence interval (CI): 0.85-0.96) and serum amyloid P (SAP; OR: 0.88, 95% CI: 0.78-0.99) were protective in terms of risk of non-affective psychosis. These relationships were not affected by the addition of covariates relevant to maternal health, pregnancy and delivery to the model. Tertile analysis confirmed a protective relationship for higher levels of tPA and SAP, as well as for procalcitonin (highest tertile OR: 0.54, 95% CI:0.32-0.91). Our results suggest that persons who develop non-affective psychoses have lower levels of certain APPs at the time of birth. These differences may render individuals more susceptible to infectious diseases or cause deficiencies in pathways critical for neurodevelopment.
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Affiliation(s)
- R M Gardner
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - C Dalman
- Department of Public Health Sciences, Division of Public Health Epidemiology, Karolinska Institutet, Stockholm, Sweden
| | - S Wicks
- Department of Public Health Sciences, Division of Public Health Epidemiology, Karolinska Institutet, Stockholm, Sweden
| | - B K Lee
- Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, PA, USA
| | - H Karlsson
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
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Kippler M, Tofail F, Hamadani JD, Gardner RM, Grantham-McGregor SM, Bottai M, Vahter M. Early-life cadmium exposure and child development in 5-year-old girls and boys: a cohort study in rural Bangladesh. Environ Health Perspect 2012; 120:1462-8. [PMID: 22759600 PMCID: PMC3491924 DOI: 10.1289/ehp.1104431] [Citation(s) in RCA: 134] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Accepted: 07/02/2012] [Indexed: 05/18/2023]
Abstract
BACKGROUND Cadmium is a commonly occurring toxic food contaminant, but health consequences of early-life exposure are poorly understood. OBJECTIVES We evaluated the associations between cadmium exposure and neurobehavioral development in preschool children. METHODS In our population-based mother-child cohort study in rural Bangladesh, we assessed cadmium exposure in 1,305 women in early pregnancy and their children at 5 years of age by measuring concentrations in urine (U-Cd), using inductively coupled plasma mass spectrometry. Children's IQ at 5 years of age, including Verbal (VIQ), Performance (PIQ), and Full-Scale IQ (FSIQ), were measured by Wechsler Preschool and Primary Scale of Intelligence. Behavior was assessed by the Strengths and Difficulties Questionnaire (SDQ). RESULTS In multiple linear regression models, adjusted for sex, home stimulation, socioeconomic status (SES), and maternal and child characteristics, a doubling of maternal U-Cd was inversely associated with VIQ (-0.84 points; 95% confidence interval: -1.3, -0.40), PIQ (-0.64 points; -1.1, -0.18), and FSIQ (-0.80 points; -1.2, -0.39). Concurrent child U-Cd showed somewhat weaker association with VIQ and FSIQ, but not PIQ. Stratification by sex and SES indicated slightly stronger associations with PIQ and FSIQ in girls than in boys and in higher-income compared with lower-income families. Concurrent U-Cd was inversely associated with SDQ-prosocial behavior and positively associated with SDQ-difficult behavior, but associations were close to the null after adjustment. Quantile regression analysis showed similar associations across the whole range of each developmental outcome. CONCLUSION Early-life low-level cadmium exposure was associated with lower child intelligence scores in our study cohort. Further research in this area is warranted.
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Affiliation(s)
- Maria Kippler
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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Gardner RM, Engström K, Bottai M, Hoque WAM, Raqib R, Broberg K, Vahter M. Pregnancy and the methyltransferase genotype independently influence the arsenic methylation phenotype. Pharmacogenet Genomics 2012; 22:508-16. [PMID: 22547080 DOI: 10.1097/fpc.0b013e3283535d6a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES The methyltransferase genotype and pregnancy both influence the arsenic metabolism phenotype, but it is unknown whether these factors interact, explaining the drastic changes in the efficiency of arsenic metabolism observed among pregnant women. The aim of this study was to evaluate the relative contribution of the methyltransferase genotype and pregnancy to the arsenic metabolism phenotype. METHODS We studied longitudinally the arsenic metabolite pattern in urine (at approximately gestational weeks 8, 14, and 30) of 303 women exposed to arsenic through drinking water and food in rural Bangladesh. Urinary arsenic metabolites were measured by high-performance liquid chromatography-inductively coupled plasma mass spectrometry. Data were available on genotypes for 16 polymorphisms, combined as haplotypes, in three methyltransferases: arsenic(+III)methyltransferase (AS3MT) and DNA-methyltransferases 1a and 3b (DNMT1a and DNMT3b). Changes in the arsenic metabolite pattern over time were evaluated by haplotype using logistic quantile regression. RESULTS All four AS3MT haplotypes and all three DNMT1a haplotypes significantly influenced the metabolite pattern in the pregnant women, with consistent effects of genotype over the entire course of pregnancy. No interaction was found between the haplotypes and pregnancy-related changes in the arsenic metabolism phenotype. DNMT3b haplotypes did not significantly influence the metabolite pattern. We observed a pregnancy-attributable decrease of 5.7% in the most risk-associated monomethylated metabolite, methylarsonic acid, whereas changes between 1.6 and 5.3% of methylarsonic acid could be attributed to haplotypes of AS3MT and DNMT1a. CONCLUSION Independent of the genotype, the efficiency of arsenic methylation increased markedly over the course of pregnancy. The effect of pregnancy on the metabolite pattern during the observational period was greater than the effect of genotype.
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Affiliation(s)
- Renee M Gardner
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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Ahmed S, Khoda SME, Rekha RS, Gardner RM, Ameer SS, Moore S, Ekström EC, Vahter M, Raqib R. Arsenic-associated oxidative stress, inflammation, and immune disruption in human placenta and cord blood. Environ Health Perspect 2011; 119:258-64. [PMID: 20940111 PMCID: PMC3040615 DOI: 10.1289/ehp.1002086] [Citation(s) in RCA: 168] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2010] [Accepted: 10/12/2010] [Indexed: 05/02/2023]
Abstract
BACKGROUND Arsenic (As) exposure during pregnancy induces oxidative stress and increases the risk of fetal loss and low birth weight. OBJECTIVES In this study we aimed to elucidate the effects of As exposure on immune markers in the placenta and cord blood, and the involvement of oxidative stress. METHODS Pregnant women were enrolled around gestational week (GW) 8 in our longitudinal, population-based, mother-child cohort in Matlab, an area in rural Bangladesh with large variations in As concentrations in well water. Women (n = 130) delivering at local clinics were included in the present study. We collected maternal urine twice during pregnancy (GW8 and GW30) for measurements of As, and placenta and cord blood at delivery for assessment of immune and inflammatory markers. Placental markers were measured by immunohistochemistry, and cord blood cytokines by multiplex cytokine assay. RESULTS In multivariable adjusted models, maternal urinary As (U-As) exposure both at GW8 and at GW30 was significantly positively associated with placental markers of 8-oxoguanine (8-oxoG) and interleukin-1β (IL-1β); U-As at GW8, with tumor necrosis factor-α (TNFα) and interferon-γ (IFNγ); and U-As at GW30, with leptin; U-As at GW8 was inversely associated with CD3+ T cells in the placenta. Cord blood cytokines (IL-1β, IL-8, IFNγ, TNFα) showed a U-shaped association with U-As at GW30. Placental 8-oxoG was significantly positively associated with placental proinflammatory cytokines. Multivariable adjusted analyses suggested that enhanced placental cytokine expression (TNFα and IFNγ) was primarily influenced by oxidative stress, whereas leptin expression appeared to be mostly mediated by As, and IL-1β appeared to be influenced by both oxidative stress and As. CONCLUSION As exposure during pregnancy appeared to enhance placental inflammatory responses (in part by increasing oxidative stress), reduce placental T cells, and alter cord blood cytokines. These findings suggest that effects of As on immune function may contribute to impaired fetal and infant health.
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Affiliation(s)
- Sultan Ahmed
- International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | | | - Rokeya Sultana Rekha
- International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Renee M. Gardner
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Syeda Shegufta Ameer
- International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Sophie Moore
- Medical Research Council International Nutrition Group, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Eva-Charlotte Ekström
- International Maternal and Child Health, Department of Women’s and Children’s Health, Uppsala University Hospital, Uppsala, Sweden
| | - Marie Vahter
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Rubhana Raqib
- International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
- Address correspondence to R. Raqib, Nutritional Biochemistry Laboratory, Laboratory Sciences Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka-1212, Bangladesh. Telephone: 880-2-8860523-32, Ext. 2404. Fax: 880-28823116/880-28812529. E-mail:
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Gardner RM, Nermell B, Kippler M, Grandér M, Li L, Ekström EC, Rahman A, Lönnerdal B, Hoque AW, Vahter M. Arsenic methylation efficiency increases during the first trimester of pregnancy independent of folate status. Reprod Toxicol 2011; 31:210-8. [DOI: 10.1016/j.reprotox.2010.11.002] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Revised: 10/20/2010] [Accepted: 11/05/2010] [Indexed: 10/18/2022]
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Petratos GN, Kim Y, Evans RS, Williams SD, Gardner RM. Comparing the effectiveness of computerized adverse drug event monitoring systems to enhance clinical decision support for hospitalized patients. Appl Clin Inform 2010; 1:293-303. [PMID: 23616843 DOI: 10.4338/aci-2009-11-ra-0009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2009] [Accepted: 07/30/2010] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE Performance of computerized adverse drug event (ADE) monitoring of electronic health records through a prospective ADE Monitor and ICD9-coded clinical text review operating independently and simultaneously on the same patient population for a 10-year period are compared. Requirements are compiled for clinical decision support in pharmacy systems to enhance ADE detection. METHODS A large tertiary care facility in Utah, with a history of quality improvement using its advanced hospital information system, was leveraged in this study. ICD9-based review of clinical charts (ICD9 System) was compared quantitatively and qualitatively to computer-assisted pharmacist-verified ADEs (ADE Monitor). The capture-recapture statistical method was applied to the data to determine an estimated prevalence of ADEs. RESULTS A total estimated ADE prevalence of 5.53% (13,420/242,599) was calculated, with the ICD9 system identifying 2,604 or 19.4%, and the ADE monitor 3,386 or 25.2% of all estimated ADEs. Both methods commonly identified 4.9% of all estimated ADEs and matched 62.0% of the time, each having its strength in detecting a slightly different domain of ADEs. 70% of the ADE documentation in the clinical notes was found in the discharge summaries. CONCLUSION Coupled with spontaneous reporting, computerized methods account for approximately half of all ADEs that can currently be detected. To enhance ADE monitoring and patient safety in a hospitalized setting, pharmacy information systems should incorporate prospective structuring and coding of the text in clinical charts and using that data alongside computer-generated alerts of laboratory results and drug orders. Natural language processing can aid computerized detection by automating the coding, in real-time, of physician text from clinical charts so that decision support rules can be created and applied. New detection strategies and enhancements to existing systems should be researched to enhance the detection of ADEs since approximately half are not currently detected.
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Gardner RM, Nyland JF, Silbergeld EK. Differential immunotoxic effects of inorganic and organic mercury species in vitro. Toxicol Lett 2010; 198:182-90. [PMID: 20600710 DOI: 10.1016/j.toxlet.2010.06.015] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Revised: 06/21/2010] [Accepted: 06/21/2010] [Indexed: 11/30/2022]
Abstract
Despite the fact that humans are exposed to multiple forms of mercury (elemental, inorganic, and organic), most research on mercury toxicity has focused on methylmercury (MeHg) and on neurotoxic outcomes and mechanisms. Recent work has indicated that the immunotoxic effects of mercury compounds may be significant contributors to human disease as well as mechanistically relevant to other target organ toxicities. In this study, we compared the effects of inorganic Hg (iHg) to organic Hg species (MeHg and ethylmercury, EtHg) in human peripheral blood mononuclear cells (PBMCs) in vitro at sub-cytotoxic concentrations, using methods developed to characterize response of human PBMCs to iHg in vitro. PBMCs were isolated from six volunteer blood donors (three males and three females) and cultured in the presence and absence of lipopolysaccharide (LPS) and low levels (up to 200nM of each Hg species, separately) for 24h in culture. Cell culture supernatants were analyzed for cytokine concentrations with a bead-based multiplex assay. We report that iHg and MeHg both increase pro-inflammatory cytokine release in LPS-stimulated PBMCs, while EtHg decreases IFN-gamma release as well pro-inflammatory cytokine release. IL-17 release is significantly increased only in response to iHg treatment. Levels of anti-inflammatory cytokines (IL-1Ra and IL-10) were not significantly altered by any Hg treatment. These results indicate that both organic and inorganic species of Hg can affect the human immune system, but that they may exert different effects on immune function.
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Affiliation(s)
- Renee M Gardner
- Johns Hopkins Bloomberg School of Public Health, Department of Environmental Health Sciences, 615 N. Wolfe St., Baltimore, MD 21205, United States.
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Gardner RM, Nyland JF, Silva IA, Ventura AM, Souza JMD, Silbergeld EK. Mercury exposure, serum antinuclear/antinucleolar antibodies, and serum cytokine levels in mining populations in Amazonian Brazil: a cross-sectional study. Environ Res 2010; 110:345-54. [PMID: 20176347 PMCID: PMC2873228 DOI: 10.1016/j.envres.2010.02.001] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2009] [Revised: 01/29/2010] [Accepted: 02/02/2010] [Indexed: 05/19/2023]
Abstract
Mercury is an immunotoxic substance that has been shown to induce autoimmune disease in rodent models, characterized by lymphoproliferation, overproduction of immunoglobulin (IgG and IgE), and high circulating levels of auto-antibodies directed at antigens located in the nucleus (antinuclear auto-antibodies, or ANA) or the nucleolus (antinucleolar auto-antibodies, or ANoA). We have reported elevated levels of ANA and ANoA in human populations exposed to mercury in artisanal gold mining, though other confounding variables that may also modulate ANA/ANoA levels were not well controlled. The goal of this study is to specifically test whether occupational and environmental conditions (other than mercury exposure) that are associated with artisanal gold mining affect the prevalence of markers of autoimmune dysfunction. We measured ANA, ANoA, and cytokine concentrations in serum and compared results from mercury-exposed artisanal gold miners to those from diamond and emerald miners working under similar conditions and with similar socio-economic status and risks of infectious disease. Mercury-exposed gold miners had higher prevalence of detectable ANA and ANoA and higher titers of ANA and ANoA as compared to diamond and emerald miners with no occupational mercury exposure. Also, mercury-exposed gold miners with detectable ANA or ANoA in serum had significantly higher concentrations of pro-inflammatory cytokines IL-1beta, TNF-alpha, and IFN-gamma in serum as compared to the diamond and emerald miners. This study provides further evidence that mercury exposure may lead to autoimmune dysfunction and systemic inflammation in affected populations.
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Affiliation(s)
- Renee M. Gardner
- Johns Hopkins Bloomberg School of Public Health, Department of Environmental Health Sciences, Baltimore, MD 21205
| | - Jennifer F. Nyland
- Johns Hopkins Bloomberg School of Public Health, Department of Environmental Health Sciences, Baltimore, MD 21205
- University of South Carolina School of Medicine, Department of Pathology, Microbiology & Immunology, Columbia, SC 29209
| | - Ines A. Silva
- Johns Hopkins Bloomberg School of Public Health, Department of Environmental Health Sciences, Baltimore, MD 21205
| | - Ana Maria Ventura
- Institute Evandro Chagas (IEC), Fundaçao Nacional da Saúde, Belem do Pará-66090, Brazil
| | - Jose Maria de Souza
- Institute Evandro Chagas (IEC), Fundaçao Nacional da Saúde, Belem do Pará-66090, Brazil
| | - Ellen K. Silbergeld
- Johns Hopkins Bloomberg School of Public Health, Department of Environmental Health Sciences, Baltimore, MD 21205
- Corresponding Author: Ellen K. Silbergeld, Johns Hopkins Bloomberg School of Public Health, Environmental Health Sciences, 615 N. Wolfe St., Room E6644, Baltimore, MD, 21205, Phone: (410) 955-8678, Fax: (443) 287-6414,
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Gardner RM, Nyland JF, Evans SL, Wang SB, Doyle KM, Crainiceanu CM, Silbergeld EK. Mercury induces an unopposed inflammatory response in human peripheral blood mononuclear cells in vitro. Environ Health Perspect 2009; 117:1932-8. [PMID: 20049214 PMCID: PMC2799469 DOI: 10.1289/ehp.0900855] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Accepted: 08/19/2009] [Indexed: 05/03/2023]
Abstract
BACKGROUND The human immune response to mercury is not well characterized despite the body of evidence that suggests that Hg can modulate immune responses, including the induction of autoimmune disease in some mouse models. Dysregulation of cytokine signaling appears to play an important role in the etiology of Hg-induced autoimmunity in animal models. OBJECTIVES In this study, we systematically investigated the human immune response to Hg in vitro in terms of cytokine release. METHODS Human peripheral blood mononuclear cells (PBMCs) were isolated from 20 volunteers who donated blood six separate times. PBMCs were cultured with lipopolysaccharide and concentrations of mercuric chloride (HgCl(2)) up to 200 nM. Seven cytokines representing important pathways in physiologic and pathologic immune responses were measured in supernatants. We used multilevel models to account for the intrinsic clustering in the cytokine data due to experimental design. RESULTS We found a consistent increase in the release of the proinflammatory cytokines interleukin-1beta (IL-1beta) and tumor necrosis factor-alpha, and concurrent decrease in release of the antiinflammatory cytokines interleukin 1-receptor antagonist (IL-1Ra) and IL-10 in human PBMCs treated with subcytotoxic concentrations of HgCl(2). IL-4, IL-17, and interferon-gamma increased in a concentration-response manner. These results were replicated in a second, independently recruited population of 20 different volunteers. CONCLUSIONS Low concentrations of HgCl(2) affect immune function in human cells by dysregulation of cytokine signaling pathways, with the potential to influence diverse health outcomes such as susceptibility to infectious disease or risk of autoimmunity.
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Affiliation(s)
- Renee M. Gardner
- Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Jennifer F. Nyland
- Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Department of Pathology, Microbiology, and Immunology, University of South Carolina School of Medicine, Columbia, South Carolina, USA
| | - Sean L. Evans
- Department of Molecular Microbiology and Immunology and
| | - Susie B. Wang
- Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Kathleen M. Doyle
- Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Ciprian M. Crainiceanu
- Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Ellen K. Silbergeld
- Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Address correspondence to E.K. Silbergeld, Johns Hopkins Bloomberg School of Public Health, Environmental Health Sciences, 615 N. Wolfe St., Room E6644, Baltimore, MD 21205 USA. Telephone: (410) 955-8678. Fax: (443) 287-6414. E-mail:
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Gardner RM. Clinical decision support systems: the fascination with closed-loop control. Yearb Med Inform 2009:17-21. [PMID: 19855866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Affiliation(s)
- R M Gardner
- Department of Medical Informatics, University of Utah, Salt Lake City, Utah, USA.
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Jaspers MWM, Gardner RM, Gatewood LC, Haux R, Evans RS. An international summer school on health informatics: a collaborative effort of the Amsterdam Medical Informatics Program and IPhiE--the International Partnership for Health Informatics Education. Int J Med Inform 2006; 76:538-46. [PMID: 16542869 DOI: 10.1016/j.ijmedinf.2006.02.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2005] [Revised: 02/17/2006] [Accepted: 02/19/2006] [Indexed: 10/24/2022]
Abstract
PURPOSE Today, the need for health informatics training for health care professionals is acknowledged and educational opportunities for these professionals are increasing. To contribute to these efforts, a new initiative was undertaken by the Medical Informatics Program of the University of Amsterdam-Academic Medical Center and IPHIE (IPhiE)-the International Partnership for Health Informatics Education. In the year 2004, a summer school on health informatics was organized for advanced medical students from all over the world. METHODS We elaborate on the goals and the program for this summer school. In developing the course, we followed the international guidelines of the International Medical Informatics Association-IMIA. Students provided feedback for the course through both summative and formative evaluations. As a result of these evaluations, we outline the lessons we have learned and what consequences these results have had in revising the course. RESULTS Overall the results of both the summative and formative evaluation of the summer school showed that we succeeded in the goals we set at the beginning of the course. Students highly appreciated the course content and indicated that the course fulfilled their educational needs. The decision support and image processing computer practicums however proved too high level. We therefore will redesign these practicums to competence requirements of medical doctors as defined by IMIA. All participants recommended the summer school event to other students. CONCLUSIONS Our experiences demonstrated a true need for health informatics education among medical students and that even a 2 weeks course can fulfill health informatics educational needs of these future physicians. Further establishment of health informatics courses for other health professions is recommended.
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Affiliation(s)
- M W M Jaspers
- Department of Medical Informatics, Academic Medical Center, University of Amsterdam, P.O. Box 22700, 1000 DE Amsterdam, The Netherlands.
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Ammenwerth E, Talmon J, Ash JS, Bates DW, Beuscart-Zéphir MC, Duhamel A, Elkin PL, Gardner RM, Geissbuhler A. Impact of CPOE on mortality rates--contradictory findings, important messages. Methods Inf Med 2006; 45:586-93. [PMID: 17149499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
OBJECTIVE To analyze the seemingly contradictory results of the Han study (Pediatrics 2005) and the Del Beccaro study (Pediatrics 2006), both analyzing the effect of CPOE systems on mortality rates in pediatric intensive care settings. METHODS Seven CPOE system experts from the United States and Europe comment on these papers. RESULTS The two studies are not contradictory, but almost non-comparable due to differences in design and implementation. They demonstrate the range of outcomes that can be obtained from introducing informatics applications in complex health care settings. Implementing informatics applications is a sociotechnical activity, which often depends more on the organizational context than on a specific technology. As health informaticians, we must not only learn from failures, but also avoid both uncritical scepticism that may arise from drawing overly general conclusions from one negative trial, as much as uncritical optimism from limited successful ones. CONCLUSION The commentaries emphasize the need to promote systematic studies for assessing the socio-technical factors that influence the introduction of increasingly sophisticated informatics applications within complex organizations. The emergence of evidence-based health informatics will be based both on evaluation guidelines and implementation guidelines, both of which increase the chances of successful implementation. In addition, well-educated health informaticians are needed to manage and guide the implementation processes.
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Affiliation(s)
- E Ammenwerth
- University for Health Sciences, Medical Informatics and Technology, Institute for Health Information Systems, Eduard-Wallnöfer-Zentrum I, 6060 Hall, Tyrol, Austria.
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Jaspers MWM, Gardner RM, Gatewood LC, Haux R, Schmidt D, Wetter T. Achievements after Six Years of The International Partnership for Health Informatics Education. Yearb Med Inform 2005:173-182. [PMID: 27706301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Affiliation(s)
- M W M Jaspers
- Monique W. M. Jaspers, PhD, University of Amsterdam, Academic Medical Center, Department of Medical Informatics, J2-259, P.O. Box 22700, 1000 DE Amsterdam, The Netherlands, Tel: +31 20 5665178, Fax: +31 20 6919840, E-mail:
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Jaspers MWM, Gardner RM, Gatewood LC, Haux R, Schmidt D, Wetter T. The International Partnership for Health Informatics Education: lessons learned from six years of experience. Methods Inf Med 2005; 44:25-31. [PMID: 15778791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
OBJECTIVES To inform the medical and health informatics community on the rational, goals, and the achievements of the International Partnership for Health Informatics Education--IPHIE, (I phi E), that was established at six universities in 1999. METHODS We elaborate on the overall goals of I phi E and describe the current state of affairs: the activities undertaken and faculty and student experience related to these activities. In addition we outline the lessons we have learned over these past six years and our plans for the future. RESULTS I phi E members first started to collaborate by supporting and encouraging the exchange of talented students and faculty and by establishing joint master classes for honors students. Following the success of these activities, new initiatives were undertaken such as the organization of student workshops at medical informatics conferences and a joint course on strategic information management in hospitals in Europe. CONCLUSIONS International partnerships such as I phi E take time to establish, and, if they are to be successful, maintaining leadership continuity is critically important. We are convinced that I phi E promotes professionalism of future medical informatics specialists. There will be a continuing growth of globalization in higher education. It will therefore become increasingly important to offer educational programs with international components.
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Affiliation(s)
- M W M Jaspers
- Department of Medical Informatics, American Medical College, University of Amsterdam, J2-259, P.O. Box 22700, 1000 DE Amsterdam, The Netherlands.
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Jaspers MWM, Gardner RM, Gatewood LC, Haux R, Schmidt D, Wetter T. The International Partnership in Health Informatics Education. Stud Health Technol Inform 2004; 107:884-8. [PMID: 15360939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
The International Partnership for Health Informatics Education (IPHIE) seeks to promote education through international collaboration of graduate and undergraduate training programs in Medical and Health Informatics. In 1998 an International Partnership of Health Informatics Education was established at six universities: The University of Amsterdam, the Universities of Heidelberg and Heilbronn, the University of Health Informatics and Technology Tyrol at Innsbruck, the University of Minnesota and the University of Utah. The overall goal of this cooperation was to form a network for training and educating medical informatics faculty and students in order to prepare them for leading international positions in medical information and communication technology. In this paper we describe the current state of affairs of IPhiE: the activities undertaken, our experiences, the lessons we have learned over these past five years. In addition we outline our plans for the future.
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Affiliation(s)
- M W M Jaspers
- Department of Medical Informatics, Academic Medical Center, University of Amsterdam, The Netherlands
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Abstract
Body size perception was measured in 41 children aged 6-10 who had been either sexually or physically abused, or had no history of abuse. Two psychophysical methods were used, including the staircase method and a signal detection method. In the staircase methodology, children adjusted the direction of distortion of their continuously changing body size. In the signal detection method, children made judgments about the presence or absence of size distortion in presented images. Results using the staircase method indicated children overestimated their body sizes, with no differences between abuse conditions, gender, or age. For the signal detection methodology, no difference in ability to detect the presence/absence of size distortion (d') was found between abuse conditions, although females were less accurate than males. All groups were better able to detect distortion when the image was distorted too wide. Measures of response bias (Ln beta) indicated that sexually abused children had a greater bias to report size distortion as present, as compared with the physically abused children.
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Affiliation(s)
- R M Gardner
- Department of Psychology, University of Southern Colorado, Pueblo 81001
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Jaspers MW, Gardner RM, Gatewood LC, Haux R, Leven FJ, Limburg M, Ravesloot JH, Schmidt D, Wetter T. IPHIE: an International Partnership in Health Informatics Education. Stud Health Technol Inform 2001; 77:549-53. [PMID: 11187613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Medical informatics contributes significantly to high quality and efficient health care and medical research. The need for well educated professionals in the field of medical informatics therefore is now worldwide recognized. Students of medicine, computer science/informatics are educated in the field of medical informatics and dedicated curricula on medical informatics have emerged. To advance and further develop the beneficial role of medical informatics in the medical field, an international orientation of health and medical informatics students seems an indispensable part of their training. An international orientation and education of medical informatics students may help to accelerate the dissemination of acquired knowledge and skills in the field and the promotion of medical informatics research results on a more global level. Some years ago, the departments of medical informatics of the university of Heidelberg/university of applied sciences Heilbronn and the university of Amsterdam decided to co-operate in the field of medical informatics. Now, this co-operation has grown out to an International Partnership of Health Informatics Education (IPHIE) of 5 universities, i.e. the university of Heidelberg, the university of Heilbronn, the university of Minnesota, the university of Utah and the university of Amsterdam. This paper presents the rationale behind this international partnership, the state of the art of the co-operation and our future plans for expanding this international co-operation.
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Affiliation(s)
- M W Jaspers
- Department of Medical Informatics, Academic Medical Center, University of Amsterdam
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Abstract
The immature rat uterus has been extensively used as an in vivo model system to study the molecular mechanisms of steroid hormone actions. In this study, we demonstrated the regulated expression of syndecan-3 in the rat uterus by the steroid hormone 17 beta-estradiol. Administration of a single physiological dose of 17 beta-estradiol (40 microg/kg) to ovariectomized immature animals induced a rapid and transient increase in uterine syndecan-3 mRNA. Transcript levels reached a peak elevation of 3-fold above saline control tissues 4 h after hormone administration. Inhibition of message up-regulation by actinomycin D but not cycloheximide indicated a hormone response dependent on RNA transcription but not new protein synthesis. The estrogenic ligands estriol and tamoxifen were also effective at raising syndecan-3 mRNA levels; however, nonestrogenic ligands, including progesterone, 5 alpha-dihydrotestosterone, and dexamethasone, failed to stimulate a change in mRNA levels. Hormone-induced changes in mRNA led to transient changes in syndecan-3 protein content and significant alteration in the temporal and spatial expression in endometrial epithelial cells. Collectively, these data show that the steroid hormone 17 beta-estradiol, regulates transcription of the syndecan-3 gene in the uterus via an estrogen receptor-dependent mechanism. This estrogen-regulated expression of syndecan-3 may play an important role in changes in tissue ultrastructure crucial for proper uterine growth.
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Affiliation(s)
- L A Russo
- Department of Biology, Villanova University, Villanova, Pennsylvania 19085, USA.
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Gardner RM. University of Utah Medical Informatics Research and Training Program. Yearb Med Inform 2001:103-111. [PMID: 27701603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Affiliation(s)
- R M Gardner
- Reed M. Gardner, PhD, Professor and Chairman, Department of Medical Informatics, University of Utah, Co-Director of Medical Informatics, LDS Hospital, University of Utah, School of Medicine, Room AB193, 50 North Medical Drive, Salt Lake City, Utah, USA, E-mail:
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Abstract
OBJECTIVE To analyze whether computer-generated reminders about infections could influence clinicians' practice patterns and consequently improve the detection and management of nosocomial infections. DESIGN The conclusions produced by an expert system developed to detect and manage infections were presented to the attending clinicians in a pediatric hospital to determine whether this information could improve detection and management. Clinician interventions were compared before and after the implementation of the system. MEASUREMENTS The responses of the clinicians (staff physicians, physician assistants, and nurse practitioners) to the reminders were determined by review of paper medical charts. Main outcome measures were the number of suggestions to treat and manage infections that were followed before and after the implementation of COMPISS (Computerized Pediatric Infection Surveillance System). The clinicians' opinions about the system were assessed by means of a paper questionnaire distributed following the experiment. RESULTS The results failed to show a statistical difference between the clinicians' treatment strategies before and after implementation of the system (P: > 0.33 for clinicians working in the emergency room and P: > 0.45 for clinicians working in the pediatric intensive care unit). The questionnaire results showed that the respondents appreciated the information presented by the system. CONCLUSION The computer-generated reminders about infections were unable to influence the practice patterns of clinicians. The methodologic problems that may have contributed to this negative result are discussed.
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Affiliation(s)
- B H Rocha
- University of Utah, Salt Lake City, Utah.
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Abstract
Avoidance of shortcomings of older scales of body image and use of additional measurements in newer scales are stated.
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Affiliation(s)
- R M Gardner
- Department of Psychology, University of Colorado at Denver, 80217, USA.
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Abstract
The objective of this study was to identify variables that predict higher eating disorder scores in non-clinical boys and girls ages 6 through 14. Two hundred sixteen children participated and were tested annually for 3 years. A TV-video procedure was used to measure the accuracy of body size judgments. Variables examined included demographic, familial, sociocultural, social, esteem, and clinical variables. Predictors of higher eating disorder scores for both sexes included height and weight, children's perceptions of parental concerns about their body size, low body esteem, and depression. For girls only, a larger perceived body size and smaller idealized body size were also predictors. Teasing was a predictor for boys only. An analysis of longitudinal changes suggests that low body esteem becomes a significant factor around age 9, depression emerges as a predictor at age 10, and body size judgments in perceived and ideal sizes at ages 11 and 12. Changes over 2 years in individuals' weight and height, teasing, body dissatisfaction, and eating disorder scores were also found to predict higher eating disorder scores.
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Affiliation(s)
- R M Gardner
- Department of Psychology, University of Colorado at Denver, Campus Box 173, P.O. Box 173364, Denver, CO 80217-3364, USA.
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