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Ylijoki M, Sentenac M, Pape B, Zeitlin J, Lehtonen L. The aetiology of preterm birth and risks of cerebral palsy and cognitive impairment: A systematic review and meta-analysis. Acta Paediatr 2024; 113:643-653. [PMID: 38265113 DOI: 10.1111/apa.17118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 11/15/2023] [Accepted: 01/11/2024] [Indexed: 01/25/2024]
Abstract
AIM The associations between the aetiology of preterm birth and later neurodevelopmental outcomes are unclear. A systematic review and meta-analysis examined the existing evidence. METHODS The PubMed and Embase databases were searched for papers published in English from inception to 16 December 2020. We included original papers on the causes of preterm birth and the risks of cerebral palsy (CP) and suboptimal cognitive development. Two reviewers independently evaluated the studies and extracted the data. RESULTS The literature search yielded 5472 papers and 13 were selected. The aetiology of preterm birth was classified under spontaneous or medically indicated delivery. A meta-analysis was performed, comprising 104 902 preterm infants from 11 papers on CP. Preterm infants born after a medically indicated delivery had a lower CP risk than infants born after spontaneous delivery, with a pooled odds ratio of 0.59 (95% confidence interval 0.40-0.86). This result was robust in the subgroup and sensitivity analyses. Cognitive development was reported in three papers, which suggested that worse outcomes were associated with medically indicated deliveries. CONCLUSION The aetiology of preterm delivery may contribute to the risk of CP and cognitive delay. Further research is needed, using individual-level meta-analyses to adjust for possible confounders, notably gestational age.
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Affiliation(s)
- Milla Ylijoki
- Department of Paediatrics and Adolescent Medicine, Turku University Hospital, Turku, Finland
- University of Turku, Turku, Finland
- Department of Paediatric Neurology, University of Turku, Turku, Finland
| | - Mariane Sentenac
- Université Paris Cité, Inserm, INRAE, Centre of Research in Epidemiology and Statistic (CRESS), Paris, France
| | - Bernd Pape
- Department of Biostatistics, University of Turku and Turku University Hospital, Turku, Finland
- Department of Mathematics and Statistics, University of Vaasa, Finland, Vaasa, Finland
| | - Jennifer Zeitlin
- Université Paris Cité, Inserm, INRAE, Centre of Research in Epidemiology and Statistic (CRESS), Paris, France
| | - Liisa Lehtonen
- Department of Paediatrics and Adolescent Medicine, Turku University Hospital, Turku, Finland
- University of Turku, Turku, Finland
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Grönroos L, Rautava P, Setänen S, Nyman A, Ekholm E, Lehtonen L, Ylijoki M. Associations between the aetiology of preterm birth and mortality and neurodevelopment up to 11 years. Acta Paediatr 2024; 113:471-479. [PMID: 37926858 DOI: 10.1111/apa.17027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 10/16/2023] [Accepted: 10/25/2023] [Indexed: 11/07/2023]
Abstract
AIM To investigate how the aetiology of very preterm birth/very low birth weight is associated with mortality and later neurodevelopmental outcomes. METHODS Very preterm/very low-birth weight singletons were categorised based on the aetiology of preterm birth: spontaneous preterm birth (n = 47, 28.1%), preterm premature rupture of membranes (n = 56, 33.5%) or placental vascular pathology (n = 64, 38.3%). Mortality, cerebral palsy, severe cognitive impairment by 11 years of age (<2SD) and mean full-scale intelligence quotient at 11 years were studied in association with birth aetiology. RESULTS There was no difference in mortality or rate of cerebral palsy according to birth aetiologies. The rate of severe cognitive impairment was lower (4.9% vs. 15.3%) in the preterm premature rupture of the membrane group in comparison to the placental vascular pathology group (OR 0.2, 95% CI 0.03-0.9, adjusted for gestational age). At 11 years, there was no statistically significant difference in the mean full-scale intelligence quotient. CONCLUSION Placental vascular pathology, as the aetiology of very preterm birth/very low birth weight, is associated with a higher rate of severe cognitive impairments in comparison to preterm premature rupture of membranes, although there was no difference in the mean full-scale intelligence quotient at 11 years. The aetiology of very preterm birth/very low birth weight was not associated with mortality or the rate of cerebral palsy.
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Affiliation(s)
- Linda Grönroos
- Department of Pediatric Neurology, University of Turku and Turku University Hospital, Turku, Finland
| | - Päivi Rautava
- Department of Public Health, University of Turku, Turku, Finland
| | - Sirkku Setänen
- Department of Pediatric Neurology, University of Turku and Turku University Hospital, Turku, Finland
| | - Anna Nyman
- Department of Psychology, University of Turku, Turku, Finland
| | - Eeva Ekholm
- Department of Obstetrics and Gynaecology, University of Turku and Turku University Hospital, Turku, Finland
| | - Liisa Lehtonen
- Department of Pediatrics, University of Turku and Turku University Hospital, Turku, Finland
| | - Milla Ylijoki
- Department of Pediatric Neurology, University of Turku and Turku University Hospital, Turku, Finland
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Park JY, Park CW, Moon KC, Park JS, Jun JK, Lee SJ, Kim JH. Retinopathy of prematurity in infants without fetal growth restriction is decreased with the progression of acute histologic chorioamnionitis: New observation as a protective factor against retinopathy of prematurity. Placenta 2020; 104:161-167. [PMID: 33348284 DOI: 10.1016/j.placenta.2020.12.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 12/01/2020] [Accepted: 12/14/2020] [Indexed: 11/25/2022]
Abstract
INTRODUCTION IGF-1 deficiency in prenatal period is known to be a definite pathophysiology of retinopathy of prematurity(ROP), which is more frequent in infants with fetal growth restriction(FGR). Of note, recent reports demonstrated intra-amniotic inflammation(IAI) closely linked to acute histologic chorioamnionitis(acute-HCA) is associated with a decrease in intact-form of IGFBP-1, ultimately rising the probability of an increase in IGF-1. Therefore, we hypothesized ROP in preterm-infants without FGR would be decreased with the progression of acute-HCA. METHODS The frequency of ROP was examined in 85 singleton preterm-infants(24.5weeks ≤ gestational-age[GA] at delivery<30weeks) due to either preterm-labor and intact-membranes(PTL) or preterm premature rupture of membranes(preterm-PROM) without FGR(birth-weight<5th percentile for GA). Patients were divided according to the progression of inflammation in extra-placental membranes(EPM) and the progression of inflammation in chorionic-vessel(CV) and umbilical-cord(UC). RESULTS 1) ROP was present in 40%(34/85) of study-population; 2) Of note, there was a significant stepwise-decrease in ROP with the progression of inflammation in EPM(inflammation-free EPM vs. inflammation restricted to CD vs. amnionitis; 55.6%[15/27]vs.39.5%[17/43]vs.13.3%[2/15]) and the progression of inflammation in CV and UC(inflammation-free CV and UC vs. inflammation restricted to CV and umbilical vessels vs. inflammation in Wharton's jelly[WJ]; 49.2%[29/59]vs.25.0%[3/12]vs.14.3%[2/14])(each-for P < 0.05, Chi-square test and each-for P < 0.01, linear-by-linear association); 3) Multiple logistic-regression analysis demonstrated amnionitis(Odds-Ratio 0.120, 95%Confidence-Interval 0.022-0.654, P = 0.014) and inflammation in WJ(Odds-Ratio 0.124, 95%Confidence-Interval 0.022-0.694, P = 0.018) were independent protective-factors against ROP. DISCUSSION ROP in preterm-infants due to PTL or preterm-PROM without FGR is decreased with the progression of acute-HCA. This finding may be an evidence to suggest the progression of acute-HCA is closely associated with reducing the pathophysiology of ROP.
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Affiliation(s)
- Jee Yoon Park
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, South Korea; Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Gyeonggi-do, South Korea
| | - Chan-Wook Park
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, South Korea; Institute of Reproductive Medicine and Population, Seoul National University Medical Research Center, Seoul, South Korea.
| | - Kyung Chul Moon
- Department of Pathology, Seoul National University College of Medicine, Seoul, South Korea
| | - Joong Shin Park
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, South Korea
| | - Jong Kwan Jun
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, South Korea; Institute of Reproductive Medicine and Population, Seoul National University Medical Research Center, Seoul, South Korea
| | - Seok Jae Lee
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, South Korea
| | - Jeong Hun Kim
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, South Korea; Department of Ophthalmology, Seoul National University College of Medicine, Seoul, South Korea.
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Villamor-Martinez E, Álvarez-Fuente M, Ghazi AMT, Degraeuwe P, Zimmermann LJI, Kramer BW, Villamor E. Association of Chorioamnionitis With Bronchopulmonary Dysplasia Among Preterm Infants: A Systematic Review, Meta-analysis, and Metaregression. JAMA Netw Open 2019; 2:e1914611. [PMID: 31693123 PMCID: PMC6865274 DOI: 10.1001/jamanetworkopen.2019.14611] [Citation(s) in RCA: 115] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 09/16/2019] [Indexed: 12/29/2022] Open
Abstract
Importance Bronchopulmonary dysplasia (BPD), a chronic lung disease of prematurity, remains one of the major and most common complications of very preterm birth. Insight into factors associated with the pathogenesis of BPD is key to improving its prevention and treatment. Objective To perform a systematic review, meta-analysis, and metaregression of clinical studies exploring the association between chorioamnionitis (CA) and BPD in preterm infants. Data Sources PubMed and Embase were searched without language restriction (last search, October 1, 2018). Key search terms included bronchopulmonary dysplasia, chorioamnionitis, and risk factors. Study Selection Included studies were peer-reviewed studies examining preterm (<37 weeks' gestation) or very low-birth-weight (<1500 g) infants and reporting primary data that could be used to measure the association between exposure to CA and the development of BPD. Data Extraction and Synthesis The Meta-analysis of Observational Studies in Epidemiology (MOOSE) guideline was followed. Data were independently extracted by 2 researchers. A random-effects model was used to calculate odds ratios (ORs) and 95% CIs. Heterogeneity in effect size across studies was studied using multivariate, random-effects metaregression analysis. Main Outcomes and Measures The primary outcome was BPD, defined as supplemental oxygen requirement on postnatal day 28 (BPD28) or at the postmenstrual age of 36 weeks (BPD36). Covariates considered as potential confounders included differences between CA-exposed and CA-unexposed infants in gestational age, rates of respiratory distress syndrome (RDS), exposure to antenatal corticosteroids, and rates of early- and late-onset sepsis. Results A total of 3170 potentially relevant studies were found, of which 158 met the inclusion criteria (244 096 preterm infants, 20 971 CA cases, and 24 335 BPD cases). Meta-analysis showed that CA exposure was significantly associated with BPD28 (65 studies; OR, 2.32; 95% CI, 1.88-2.86; P < .001; heterogeneity: I2 = 84%; P < .001) and BPD36 (108 studies; OR, 1.29; 95% CI, 1.17-1.42; P < .001; heterogeneity: I2 = 63%; P < .001). The association between CA and BPD remained significant for both clinical and histologic CA. In addition, significant differences were found between CA-exposed and CA-unexposed infants in gestational age, birth weight, odds of being small for gestational age, exposure to antenatal corticosteroids, and early- and late-onset sepsis. Chorioamnionitis was not significantly associated with RDS (48 studies; OR, 1.10; 95% CI, 0.92-1.34; P = .24; heterogeneity: I2 = 90%; P < .001), but multivariate metaregression analysis with backward elimination revealed that a model combining the difference in gestational age and the odds of RDS was associated with 64% of the variance in the association between CA and BPD36 across studies. Conclusions and Relevance The results of this study confirm that among preterm infants, exposure to CA is associated with a higher risk of developing BPD, but this association may be modulated by gestational age and risk of RDS.
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Affiliation(s)
- Eduardo Villamor-Martinez
- Department of Pediatrics, School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | | | - Amro M. T. Ghazi
- Department of Pediatrics, School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Pieter Degraeuwe
- Department of Pediatrics, School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Luc J. I. Zimmermann
- Department of Pediatrics, School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Boris W. Kramer
- Department of Pediatrics, School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Eduardo Villamor
- Department of Pediatrics, School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
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Ylijoki MK, Ekholm E, Ekblad M, Lehtonen L. Prenatal Risk Factors for Adverse Developmental Outcome in Preterm Infants-Systematic Review. Front Psychol 2019; 10:595. [PMID: 30971974 PMCID: PMC6445261 DOI: 10.3389/fpsyg.2019.00595] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 03/04/2019] [Indexed: 11/13/2022] Open
Abstract
Background: Preterm infants are still at an increased risk for suboptimal neurodevelopmental outcomes when compared with term born infants. The development of a child born preterm can be jeopardized by suboptimal conditions during pregnancy, in addition to the suboptimal growth environment postnatally compared to the normal in utero environment. This review summarizes the literature on the role of chorioamnionitis, placental insufficiency, and maternal smoking on the developmental outcomes of preterm infants. Methods: A systematic database search was performed to identify all original articles published on or before September 12, 2018 that evaluated the impact of clinical or histological chorioamnionitis, abnormal prenatal fetal and placental blood flow, and prenatal smoking exposure on the neuropsychological and cognitive outcomes of preterm infants. We identified a total of 54 studies. Thirty five original articles evaluated the effects of clinical or histological chorioamnionitis; 15 studies evaluated the effects of abnormal blood flow patterns; and four studies evaluated the effects of maternal smoking during pregnancy. Results: The studies on prenatal risk factors showed conflicting results about the impact on the neurodevelopment of preterm infants. The majority of the studies did not show that chorioamnionitis poses a direct risk to the development of preterm infants. The role of abnormal prenatal placental and fetal blood flow on the development of preterm infants remained inconclusive because the sample sizes were often small and methodological problems complicated the interpretation of the data. Maternal smoking during pregnancy was assessed only in one cohort which showed that maternal smoking is a risk for suboptimal cognitive and neuropsychological development in preterm infants. Conclusions: This review summarizes the data on several prenatal risk factors which play a role in the developmental outcomes of preterm infants. To optimize the developmental outcomes, we need to first optimize the fetal wellbeing before birth. More research that extends from the fetal life to long-term developmental outcomes is needed.
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Affiliation(s)
- Milla K Ylijoki
- Department of Paediatrics and Adolescent Medicine, Turku University Hospital, University of Turku, Turku, Finland.,Department of Paediatric Neurology, Turku University Hospital, University of Turku, Turku, Finland
| | - Eeva Ekholm
- Department of Obstetrics and Gynaecology, Turku University Hospital, University of Turku, Turku, Finland
| | - Mikael Ekblad
- Department of Human Development and Family Studies, Purdue University, West Lafayette, IN, United States.,Department of General Practice, Turku University Hospital, Turku University, Turku, Finland
| | - Liisa Lehtonen
- Department of Paediatrics and Adolescent Medicine, Turku University Hospital, University of Turku, Turku, Finland
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Villamor-Martinez E, Cavallaro G, Raffaeli G, Mohammed Rahim OMM, Gulden S, Ghazi AMT, Mosca F, Degraeuwe P, Villamor E. Chorioamnionitis as a risk factor for retinopathy of prematurity: An updated systematic review and meta-analysis. PLoS One 2018; 13:e0205838. [PMID: 30332485 PMCID: PMC6192636 DOI: 10.1371/journal.pone.0205838] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 10/02/2018] [Indexed: 12/23/2022] Open
Abstract
The role of chorioamnionitis (CA) in the development of retinopathy of prematurity (ROP) is difficult to establish, because CA-exposed and CA-unexposed infants frequently present different baseline characteristics. We performed an updated systematic review and meta-analysis of studies reporting on the association between CA and ROP. We searched PubMed and EMBASE for relevant articles. Studies were included if they examined preterm or very low birth weight (VLBW, <1500g) infants and reported primary data that could be used to measure the association between exposure to CA and the presence of ROP. Of 748 potentially relevant studies, 50 studies met the inclusion criteria (38,986 infants, 9,258 CA cases). Meta-analysis showed a significant positive association between CA and any stage ROP (odds ratio [OR] 1.39, 95% confidence interval [CI] 1.11 to 1.74). CA was also associated with severe (stage ≥3) ROP (OR 1.63, 95% CI 1.41 to 1.89). Exposure to funisitis was associated with a higher risk of ROP than exposure to CA in the absence of funisitis. Additional meta-analyses showed that infants exposed to CA had lower gestational age (GA) and lower birth weight (BW). Meta-regression showed that lower GA and BW in the CA-exposed group was significantly associated with a higher risk of ROP. Meta-analyses of studies with data adjusted for confounders could not find a significant association between CA and ROP. In conclusion, our study confirms that CA is a risk factor for developing ROP. However, part of the effects of CA on the pathogenesis of ROP may be mediated by the role of CA as an etiological factor for very preterm birth.
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Affiliation(s)
- Eduardo Villamor-Martinez
- Department of Pediatrics, Maastricht University Medical Center (MUMC+), School for Oncology and Developmental Biology (GROW), Maastricht, the Netherlands
| | - Giacomo Cavallaro
- Neonatal Intensive Care Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy
| | - Genny Raffaeli
- Neonatal Intensive Care Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy
| | - Owais M. M. Mohammed Rahim
- Department of Pediatrics, Maastricht University Medical Center (MUMC+), School for Oncology and Developmental Biology (GROW), Maastricht, the Netherlands
| | - Silvia Gulden
- Neonatal Intensive Care Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy
| | - Amro M. T. Ghazi
- Department of Pediatrics, Maastricht University Medical Center (MUMC+), School for Oncology and Developmental Biology (GROW), Maastricht, the Netherlands
| | - Fabio Mosca
- Neonatal Intensive Care Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy
| | - Pieter Degraeuwe
- Department of Pediatrics, Maastricht University Medical Center (MUMC+), School for Oncology and Developmental Biology (GROW), Maastricht, the Netherlands
| | - Eduardo Villamor
- Department of Pediatrics, Maastricht University Medical Center (MUMC+), School for Oncology and Developmental Biology (GROW), Maastricht, the Netherlands
- * E-mail:
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Villamor-Martinez E, Fumagalli M, Mohammed Rahim O, Passera S, Cavallaro G, Degraeuwe P, Mosca F, Villamor E. Chorioamnionitis Is a Risk Factor for Intraventricular Hemorrhage in Preterm Infants: A Systematic Review and Meta-Analysis. Front Physiol 2018; 9:1253. [PMID: 30271352 PMCID: PMC6142185 DOI: 10.3389/fphys.2018.01253] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 08/20/2018] [Indexed: 12/29/2022] Open
Abstract
Although chorioamnionitis (CA) is a well-known risk factor for white matter disease of prematurity, the association with intraventricular hemorrhage (IVH) is controversial and has not been yet systematically reviewed. We performed a systematic review and meta-analysis of studies exploring the association between CA and IVH. A comprehensive literature search was conducted using PubMed/MEDLINE and EMBASE, from their inception to 1 July 2017. Studies were included if they examined preterm infants and reported primary data that could be used to measure the association between exposure to CA and the presence of IVH. A random-effects model was used to calculate odds ratios (OR) and 95% confidence intervals (CI). We found 1,284 potentially relevant studies, of which 85 met the inclusion criteria (46,244 infants, 13,432 CA cases). Meta-analysis showed that CA exposure was significantly associated with all grades IVH (OR 1.88, 95% CI 1.61-2.19), with grades 1-2 IVH (OR 1.69, 95% CI 1.22-2.34), and with grades 3-4 IVH (OR 1.62, 95% CI 1.42-1.85). Both clinical and histological CA were associated with an increased risk for developing IVH in very preterm infants. In contrast, the presence of funisitis did not increase IVH risk when compared to CA in the absence of funisitis (OR 1.22, 95% CI 0.89-1.67). Further meta-analyses confirmed earlier findings that CA-exposed infants have significantly lower gestational age (GA; mean difference [MD] -1.20 weeks) and lower birth weight (BW; MD -55 g) than the infants not exposed to CA. However, meta-regression and subgroup analysis could not demonstrate an association between the lower GA and BW and the risk of IVH in the CA-exposed infants. In conclusion, our data show that CA is a risk factor for IVH, but also a risk factor for greater prematurity and more clinical instability. In contrast to other complications of prematurity, such as patent ductus arteriosus, retinopathy of prematurity, or bronchopulmonary dysplasia, the effect of CA on IVH appears to be independent of CA as causative factor for very preterm birth.
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Affiliation(s)
- Eduardo Villamor-Martinez
- Department of Pediatrics, School for Oncology and Developmental Biology (GROW), Maastricht University Medical Center, Maastricht, Netherlands
| | - Monica Fumagalli
- Neonatal Intensive Care Unit, Department of Clinical Sciences and Community Health, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy
| | - Owais Mohammed Rahim
- Department of Pediatrics, School for Oncology and Developmental Biology (GROW), Maastricht University Medical Center, Maastricht, Netherlands
| | - Sofia Passera
- Neonatal Intensive Care Unit, Department of Clinical Sciences and Community Health, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy
| | - Giacomo Cavallaro
- Neonatal Intensive Care Unit, Department of Clinical Sciences and Community Health, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy
| | - Pieter Degraeuwe
- Department of Pediatrics, School for Oncology and Developmental Biology (GROW), Maastricht University Medical Center, Maastricht, Netherlands
| | - Fabio Mosca
- Neonatal Intensive Care Unit, Department of Clinical Sciences and Community Health, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy
| | - Eduardo Villamor
- Department of Pediatrics, School for Oncology and Developmental Biology (GROW), Maastricht University Medical Center, Maastricht, Netherlands
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Shi Z, Ma L, Luo K, Bajaj M, Chawla S, Natarajan G, Hagberg H, Tan S. Chorioamnionitis in the Development of Cerebral Palsy: A Meta-analysis and Systematic Review. Pediatrics 2017; 139:e20163781. [PMID: 28814548 PMCID: PMC5470507 DOI: 10.1542/peds.2016-3781] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/14/2017] [Indexed: 11/24/2022] Open
Abstract
CONTEXT Chorioamnionitis (CA) has often been linked etiologically to cerebral palsy (CP). OBJECTIVES To differentiate association from risk of CA in the development of CP. DATA SOURCES PubMed, Cochrane Library, Embase, and bibliographies of original studies were searched by using the keywords (chorioamnionitis) AND ((cerebral palsy) OR brain). STUDY SELECTION Included studies had to have: (1) controls, (2) criteria for diagnoses, and (3) neurologic follow-up. Studies were categorized based on: (1) finding incidence of CP in a CA population, or risk of CP; and (2) incidence of CA in CP or association with CP. DATA EXTRACTION Two reviewers independently verified study inclusion and extracted data. RESULTS Seventeen studies (125 256 CA patients and 5 994 722 controls) reported CP in CA. There was significantly increased CP inpreterm histologic chorioamnionitis (HCA; risk ratio [RR] = 1.34, P < .01), but not in clinical CA (CCA). Twenty-two studies (2513 CP patients and 8135 controls) reported CA in CP. There was increased CCA (RR = 1.43, P < .01), but no increase in HCA in preterm CP. Increased HCA was found (RR = 4.26, P < .05), as well as CCA in term/near-term CP (RR = 3.06, P < .01). CONCLUSIONS The evidence for a causal or associative role of CA in CP is weak. Preterm HCA may be a risk factor for CP, whereas CCA is not. An association with term and preterm CP was found for CCA, but only with term CP for HCA.
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Affiliation(s)
- Zhongjie Shi
- Department of Pediatrics, Children's Hospital of Michigan, Detroit, Michigan;
| | - Lin Ma
- Department of Obstetrics and Gynecology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China; and
| | - Kehuan Luo
- Department of Pediatrics, Children's Hospital of Michigan, Detroit, Michigan
| | - Monika Bajaj
- Department of Pediatrics, Children's Hospital of Michigan, Detroit, Michigan
| | - Sanjay Chawla
- Department of Pediatrics, Children's Hospital of Michigan, Detroit, Michigan
| | - Girija Natarajan
- Department of Pediatrics, Children's Hospital of Michigan, Detroit, Michigan
| | - Henrik Hagberg
- Department of Obstetrics and Gynecology, Perinatal Center, Institute of Clinical Sciences, University of Gothenburg, Göteborg, Sweden
| | - Sidhartha Tan
- Department of Pediatrics, Children's Hospital of Michigan, Detroit, Michigan
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Abstract
Melanoma diagnosed during pregnancy is a rare clinical case presentation which must be mastered. In the absence of guidelines for this clinical challenge, we performed a review of the literature and provide a practical guideline on how to manage such rare clinical cases based on our clinical experience. Expecting mothers require adequate counselling and explanation of all therapeutic options as they take responsibility for more than their own lives. However, they should be guided through the process of diagnostic and therapeutic measures in a potentially life-threatening situation. Pregnancy itself is no reason to withhold any type of necessary melanoma surgery. Perioperative management, however, requires certain adjustments in order to comply with this special situation. If indicated, even adjuvant and palliative systemic therapy need to be given to the patient, but they also have to be adapted to the specific circumstances as data is still sparse, especially for the new first and second line therapies with antibodies and targeted molecules.
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Affiliation(s)
- L A Schneider
- Klinik für Dermatologie und Dermatochirurgie, Helios Klinik Rottweil, Krankenhausstr 30, 78628, Rottweil, Deutschland.
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Chorioamnionitis appears not to be a Risk Factor for Patent Ductus Arteriosus in Preterm Infants: A Systematic Review and Meta-Analysis. Sci Rep 2016; 6:37967. [PMID: 27892517 PMCID: PMC5125028 DOI: 10.1038/srep37967] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 11/03/2016] [Indexed: 12/29/2022] Open
Abstract
The contribution of chorioamnionitis (CA) to mortality and morbidity in preterm infants is difficult to assess because observational studies frequently present significant differences in baseline characteristics of the infants exposed or non-exposed to CA. In an attempt to perform a thorough assessment of the possible association between CA and patent ductus arteriosus (PDA) in preterm infants, we conducted a meta-analysis in which adjusted odds ratios (ORs) were pooled and we analyzed the effects of potential confounders, such as gestational age (GA) or birth weight (BW). We identified 45 relevant studies (27186 patients, 7742 CA cases). Random effects meta-analysis of crude ORs showed a significant positive association between CA and PDA (OR 1.352, 95% CI 1.172 to 1.560). Adjusted ORs were reported in 11 studies (19577 infants). Meta-analysis of these studies showed a significant negative association between CA and PDA (OR 0.802, 95% CI 0.751 to 0.959). Meta-regression showed that the differences in GA or BW between the CA-exposed and non-exposed groups were significantly correlated with the effect size of the association between PDA and CA. In conclusion, our study confirms that confounders need to be taken into account when assessing the association between CA and clinical outcomes in preterm infants.
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Ananth CV, Friedman AM. Ischemic placental disease and risks of perinatal mortality and morbidity and neurodevelopmental outcomes. Semin Perinatol 2014; 38:151-8. [PMID: 24836827 DOI: 10.1053/j.semperi.2014.03.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Preeclampsia, intrauterine growth restriction, and placental abruption are serious obstetrical complications that constitute the syndrome of ischemic placental disease and account for a disproportionate degree of perinatal morbidity and mortality. We review the risks of stillbirth and neonatal and infant mortality in relation to ischemic placental disease, focusing on population-based studies. We also review the risks of neonatal morbidity and neurodevelopmental outcomes in relation to ischemic placental disease. A synthesis of the findings of the relevant studies relating ischemic placental disease to adverse perinatal outcomes underscores two important observations. First, despite the low prevalence of each of the three obstetrical complications, all are associated with increased risks of adverse perinatal and infant outcomes, as well as neurodevelopmental deficits. Second, the burden of increased perinatal risks appears strongest during the preterm period. Efforts to reduce the risks of ischemic placental disease remain critically important and developing effective clinical interventions will be a target worthy for consideration.
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Affiliation(s)
- Cande V Ananth
- Department of Obstetrics and Gynecology, College of Physicians and Surgeons, Columbia University, New York, NY; Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY.
| | - Alexander M Friedman
- Department of Obstetrics and Gynecology, College of Physicians and Surgeons, Columbia University, New York, NY
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Been JV, Lievense S, Zimmermann LJI, Kramer BW, Wolfs TGAM. Chorioamnionitis as a risk factor for necrotizing enterocolitis: a systematic review and meta-analysis. J Pediatr 2013; 162:236-42.e2. [PMID: 22920508 DOI: 10.1016/j.jpeds.2012.07.012] [Citation(s) in RCA: 142] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2012] [Revised: 06/19/2012] [Accepted: 07/09/2012] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To accumulate available evidence regarding the association between antenatal inflammation and necrotizing enterocolitis (NEC). STUDY DESIGN A systematic literature search was performed using Medline, Embase, Cochrane Library, ISI Web of Knowledge, and reference hand searches. Human studies published in English that reported associations between chorioamnionitis or other indicators of antenatal inflammation and NEC were eligible. Relevant associations were extracted and reported. Studies reporting associations between histological chorioamnionitis (HC) and NEC, HC with fetal involvement and NEC, and clinical chorioamnionitis and NEC were pooled in separate meta-analyses. RESULTS A total of 33 relevant studies were identified. Clinical chorioamnionitis was significantly associated with NEC (12 studies; n = 22 601; OR, 1.24; 95% CI, 1.01-1.52; P = .04; I(2) = 12%), but the association between HC and NEC was not statistically significant (13 studies; n = 5889; OR, 1.39; 95% CI, 0.95-2.04; P = .09; I(2) = 49%). However, HC with fetal involvement was highly associated with NEC (3 studies; n = 1640; OR, 3.29; 95% CI, 1.87-5.78; P ≤ .0001; I(2) = 10%). Selection based on study quality did not affect the results. No indications of publication bias were apparent. Multivariate analyses in single studies generally attenuated the reported associations. Several associations between other markers of antenatal inflammation and NEC are reported. CONCLUSION Currently available evidence supports a role for antenatal inflammation in NEC pathophysiology. This finding emphasizes the need to further study the underlying mechanisms and evaluate potential interventions to improve postnatal intestinal outcomes.
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Affiliation(s)
- Jasper V Been
- Department of Pediatrics, Maastricht University Medical Center, Maastricht, The Netherlands
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YLIJOKI MILLA, EKHOLM EEVA, HAATAJA LEENA, LEHTONEN LIISA. Is chorioamnionitis harmful for the brain of preterm infants? A clinical overview. Acta Obstet Gynecol Scand 2012; 91:403-19. [DOI: 10.1111/j.1600-0412.2012.01349.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- MILLA YLIJOKI
- Department of Pediatric Neurology
- University of Turku, Turku, Finland
| | - EEVA EKHOLM
- Department of Obstetrics and Gynecology
- University of Turku, Turku, Finland
| | - LEENA HAATAJA
- Department of Pediatric Neurology
- University of Turku, Turku, Finland
| | - LIISA LEHTONEN
- Department of Pediatrics, Turku University Hospital
- University of Turku, Turku, Finland
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Xu X, Grigorescu V, Siefert KA, Lori JR, Ransom SB. Cost of racial disparity in preterm birth: evidence from Michigan. J Health Care Poor Underserved 2009; 20:729-47. [PMID: 19648701 PMCID: PMC2743129 DOI: 10.1353/hpu.0.0180] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study examined the economic costs associated with racial disparity in preterm birth and preterm fetal death in Michigan. Linked 2003 Michigan vital statistics and hospital discharge data were used for data analysis. Thirteen percent of the singleton births among non-Hispanic Blacks were before 37 completed weeks of gestation, compared with only 7.7% among non-Hispanic Whites (risk ratio = 1.66, 95% confidence interval: 1.59-1.72; p<.0001). One thousand one hundred and eighty four (1,184) non-Hispanic Black, singleton preterm births and preterm fetal deaths would have been avoided in 2003 had their preterm birth rate been the same as Michigan non-Hispanic Whites. Economic costs associated with these excess Black preterm births and preterm fetal deaths amounted to $329 million (range: $148 million-$598 million) across their lifespan over and above the costs if they were born at term, including costs associated with the initial hospitalization, productivity loss due to perinatal death, and major developmental disabilities. Hence, racial disparity in preterm birth and preterm fetal death has substantial cost implications for society. Improving pregnancy outcomes for African American women and reducing the disparity between Blacks and Whites should continue to be a focus of future research and interventions.
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Affiliation(s)
- Xiao Xu
- Department of Obstetrics and Gynecology, University of Michigan, MI, USA.
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Xiong X, Saunders LD, Wang FL, Davidge ST, Buekens P. Preeclampsia and Cerebral Palsy in Low-Birth-Weight and Preterm Infants: Implications for the Current “Ischemic Model” of Preeclampsia. Hypertens Pregnancy 2009. [DOI: 10.3109/10641950109152637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Gotsch F, Romero R, Kusanovic JP, Mazaki-Tovi S, Pineles BL, Erez O, Espinoza J, Hassan SS. The fetal inflammatory response syndrome. Clin Obstet Gynecol 2007; 50:652-83. [PMID: 17762416 DOI: 10.1097/grf.0b013e31811ebef6] [Citation(s) in RCA: 384] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The fetal inflammatory response syndrome (FIRS) is a condition characterized by systemic inflammation and an elevation of fetal plasma interleukin-6. This syndrome has been observed in fetuses with preterm labor with intact membranes, preterm prelabor rupture of the membranes, and also fetal viral infections such as cytomegalovirus. FIRS is a risk factor for short-term perinatal morbidity and mortality after adjustment for gestational age at delivery and also for the development of long-term sequelae such as bronchopulmonary dysplasia and brain injury. Multiorgan involvement in FIRS has been demonstrated in the hematopoietic system, thymus, adrenal glands, skin, kidneys, heart, lung, and brain. This article reviews the fetal systemic inflammatory response as a mechanism of disease. Potential interventions to control an exaggerated inflammatory response in utero are also described.
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Affiliation(s)
- Francesca Gotsch
- Perinatology Research Branch, Intramural Division, NICHD/NIH/DHHS, Hutzel Women's Hospital, Bethesda, Maryland, USA
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Morken NH, Källen K, Jacobsson B. Outcomes of preterm children according to type of delivery onset: a nationwide population-based study. Paediatr Perinat Epidemiol 2007; 21:458-64. [PMID: 17697076 DOI: 10.1111/j.1365-3016.2007.00823.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The objective of the study was to investigate whether spontaneous and iatrogenic preterm births are associated with different paediatric outcomes. A nationwide population-based study comprising 1 010 487 singletons used data from 1991 to 2001 from the Swedish Medical Birth Register and the Swedish Hospital Discharge Register. Intrauterine fetal deaths, unknown type of delivery onset and congenital malformations were excluded. Neonatal, perinatal and long-term neurological outcomes were studied. Spontaneous preterm births were compared with iatrogenic preterm births. Odds ratios (OR) and hazard ratios (HR) for outcome variables were obtained using the Mantel-Haenszel technique and Cox analyses respectively. Adjustments were made for gestational age at birth, maternal age, parity and smoking. The preterm population consisted of 34 215 (73.2%) spontaneous preterm infants and 12 511 (26.8%) iatrogenic preterm infants. Spontaneous preterm infants were at increased risk of cerebral palsy at gestational age 28-31 weeks (HR: 1.86 [95% CI: 1.12, 3.10]), and of sepsis at gestational age 32-33 weeks (HR: 1.58 [95% CI: 1.28, 1.96]). Other outcome variables were associated with iatrogenic preterm birth, especially respiratory and gastrointestinal diagnoses. In conclusion, spontaneous preterm birth and iatrogenic preterm birth are associated with different paediatric outcomes.
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Oorschot DE, Voss L, Covey MV, Bilkey DK, Saunders SE. ADHD-like hyperactivity, with no attention deficit, in adult rats after repeated hypoxia during the equivalent of extreme prematurity. J Neurosci Methods 2007; 166:315-22. [PMID: 17346800 DOI: 10.1016/j.jneumeth.2007.01.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2006] [Revised: 01/16/2007] [Accepted: 01/17/2007] [Indexed: 10/23/2022]
Abstract
The most common behavioural disorder seen in children and adolescents born extremely prematurely is attention deficit hyperactivity disorder (ADHD). The hyperactive/impulsive sub-type of ADHD or the inattentive sub-type or the hyperactive/impulsive/inattentive sub-type can be evident. These sub-types of ADHD can persist into adulthood. The aim of this study was to investigate the relevance of a new immature rat model of repeated hypoxic exposure to these behavioural characteristics of extreme prematurity. More specifically, this study aimed to measure ADHD-like hyperactivity in response to delayed reward, and inattention, in repeated hypoxic versus repeated normoxic rats. Sprague-Dawley rats were exposed to either repeated hypoxia or repeated normoxia during postnatal days (PN) 1-3. The rat brain during PN1-3 is generally considered to be developmentally equivalent to the human brain during extreme prematurity. The rats were then behaviourally tested at 16 months-of-age on a multiple component fixed interval-extinction test. This test detects ADHD-like hyperactivity in response to delayed reward, as well as inattention. It was found that the repeated hypoxic rats exhibited ADHD-like hyperactivity in response to delayed reward, but no attention deficit, when compared to repeated normoxic rats. These findings provide a new animal model to investigate the biological mechanisms and treatment of ADHD-like hyperactivity due to repeated hypoxia during the equivalent of extreme prematurity.
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Affiliation(s)
- Dorothy E Oorschot
- Department of Anatomy and Structural Biology, University of Otago, P.O. Box 913, Dunedin, New Zealand.
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Abstract
PURPOSE OF REVIEW The association between perinatal infection and brain injury is widely accepted but a cause-and-effect relationship has not yet been proven. This article summarizes available evidence and current primary publications for debate. RECENT FINDINGS Work completed during the review period has reinforced current understanding of perinatal infection, prematurity and brain injury. In animal experiments: lipopolysaccharides have been further implicated in brain injury, not only as a cause of brain injury but also as mediators of preconditioning and protection. Recent studies suggest that cerebral injury following low-dose lipopolysaccharide administration may become compensated in adulthood. Other studies have emphasized the complexity of the response by showing that plasma cytokine levels may not reflect those in the central nervous system or inflammatory events in the brain. SUMMARY Perinatal infection and maternofetal inflammation is strongly associated with preterm birth. Inflammation probably represents an important mechanism for cerebral damage, and both overt lesions and maldevelopment can result. Epidemiological data and multiple animal models to link infection, inflammation and brain damage exist, but proof of causation is elusive.
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Affiliation(s)
- Anthony D Edwards
- Division of Paediatrics Obstetrics and Gynaecology, Imperial College London, Paediatrics, Hammersmith Hospital, London, UK.
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Mercer B, Milluzzi C, Collin M. Periviable birth at 20 to 26 weeks of gestation: proximate causes, previous obstetric history and recurrence risk. Am J Obstet Gynecol 2005; 193:1175-80. [PMID: 16157133 DOI: 10.1016/j.ajog.2005.05.040] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2005] [Revised: 05/02/2005] [Accepted: 05/09/2005] [Indexed: 10/25/2022]
Abstract
OBJECTIVE Early preterm birth at 20 to 26 weeks of gestation (periviable birth) carries extreme risks of infant death and morbidities. Prevention of periviable birth could improve infant outcomes significantly. We sought to characterize the causes of periviable birth and to determine whether periviable birth can be predicted by previous pregnancy outcome. STUDY DESIGN We evaluated 104,921 pregnancies (1974-2004) and assessed the frequency and causes of periviable birth. Women who were delivered of both their first and second pregnancies at >20 weeks of gestation at our institution were identified. Predictive values of the first pregnancy outcomes for second pregnancy outcomes were determined. RESULTS Periviable birth complicated 1981 deliveries (1.9%). Seventy-nine percent of the women with periviable births had no history of periviable births; 44% of the women had no previous deliveries, and 35% of the women had previous term deliveries only. Causes of periviable birth were labor (36%), premature rupture of membranes (34%), bleeding (10%), and preeclampsia (4%). Four percent of the gestations were multiple gestations. Among 7970 pregnancies at >20 weeks of gestation, periviable birth in the first pregnancy was associated with preterm birth and periviable birth in the second pregnancy (35.6%, 6.9%; relative risk, 3.3 and 8.6; P < .0001). Periviable birth and preterm birth in the first pregnancy were insensitive for periviable birth in the second pregnancy (8.8%, 36.8%, respectively). CONCLUSION Although periviable birth is associated with subsequent periviable birth and preterm birth, preterm birth and periviable birth are insensitive markers for recurrences in the next pregnancy. Early pregnancy or preconceptional markers for prediction of periviable birth are needed.
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Affiliation(s)
- Brian Mercer
- Department of Reproductive Biology, MetroHealth Medical Center at Case Western Reserve University, Cleveland, OH, USA
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Ancel PY, Marret S, Larroque B, Arnaud C, Zupan-Simunek V, Voyer M, Rozé JC, Matis J, Burguet A, Ledésert B, André M, Pierrat V, Kaminski M. Are maternal hypertension and small-for-gestational age risk factors for severe intraventricular hemorrhage and cystic periventricular leukomalacia? Results of the EPIPAGE cohort study. Am J Obstet Gynecol 2005; 193:178-84. [PMID: 16021076 DOI: 10.1016/j.ajog.2004.11.057] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The purpose of this study was to examine the relationships between different causes of preterm delivery (eg, maternal hypertension, small-for-gestational age [SGA], other) and cerebral damage (eg, cystic periventricular leukomalacia [c-PVL], grade III intraventricular hemorrhage [IVH], and intra-parenchymal hemorrhage [IPH]). STUDY DESIGN This study included 1902 very preterm singletons who were transferred to neonatal intensive care units in 9 French regions. We used logistic regression models to compare the risk of cerebral injury associated with maternal hypertension, SGA, and all other causes of preterm delivery. RESULTS We found that the risk of c-PVL and grade III IVH was higher in infants born after preterm premature rupture of membranes (PPROM) with short latency or idiopathic preterm labor than in infants born to hypertensive mothers. We show that SGA and antepartum maternal hemorrhage significantly increase the risk of IPH. CONCLUSION Our results show that infants born to hypertensive mothers have a lower risk of cerebral injuries than infants born following idiopathic preterm labor and PPROM because they are less exposed to prenatal infection.
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Affiliation(s)
- Pierre-Yves Ancel
- Inserm U149 Research Unit on Perinatal Health and Women's Health, Villejuif, France.
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Villar J, Abalos E, Carroli G, Giordano D, Wojdyla D, Piaggio G, Campodonico L, Gülmezoglu M, Lumbiganon P, Bergsjø P, Ba'aqeel H, Farnot U, Bakketeig L, Al-Mazrou Y, Kramer M. Heterogeneity of Perinatal Outcomes in the Preterm Delivery Syndrome. Obstet Gynecol 2004; 104:78-87. [PMID: 15229004 DOI: 10.1097/01.aog.0000130837.57743.7b] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Our aim was to document the differential neonatal morbidity and intrapartum and neonatal mortality of subgroups of preterm delivery. METHODS This analysis included 38,319 singleton pregnancies, of which 3,304 (8.6%) were preterm deliveries (less than 37 completed weeks) enrolled in the World Health Organization randomized trial of a new antenatal care model. We classified them as preterm deliveries after spontaneous initiation of labor, either with or without maternal obstetric and medical complications; preterm deliveries after prelabor spontaneous rupture of amniotic membranes (PROM), either with or without obstetric and medical complications; and medically indicated preterm deliveries with maternal obstetric and medical complications. Severe neonatal morbidity and neonatal mortality were the primary outcomes. RESULTS Fifty-six percent of all preterm deliveries were spontaneous, without maternal complications. Small for gestational age was increased only among the medically indicated preterm delivery group (22.3%). Very early preterm delivery (less than 32 weeks of gestation) was highest among PROM with complications (37%). For intrapartum fetal death and neonatal death, after adjusting by gestational age and other confounding variables, we found that the obstetric and medical complications preceding preterm delivery predicted the different risk levels. Conversely, for severe neonatal morbidity the clinical presentation, ie, PROM or medically indicated, predicted the increased risk. CONCLUSION There are differential neonatal outcomes among preterm deliveries according to clinical presentation, pregnancy complications, gestational age at delivery, and its association with small for gestational age. This syndromic nature of the condition should be considered if preterm delivery is to be fully understood and thus reduced.
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Affiliation(s)
- José Villar
- World Health Organization/World Bank Special Program of Research, Development, and Research Training in Human Reproduction, Department of Reproductive Health and Research, World Health Organization, Geneva, Switzerland.
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Ersch J, Fauchère JC, Bucher HU, Hebisch G, Stallmach T. The pulmonary paradox in premature infants: in-utero infected lungs do better than those with accelerated maturation. J Perinat Med 2004; 32:84-9. [PMID: 15008394 DOI: 10.1515/jpm.2004.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AIMS To document, and explain, the pulmonary paradox whereby despite relative lung immaturity, preterm infants exposed to amniotic infection (AI) have better postnatal pulmonary function than those exposed to preeclampsia (PE). METHODS Lung maturation was characterized in 65 preterm perinatal deaths [AI (n=40) and PE (n=25)] and postnatal respiratory function in 100 preterm survivors [AI (n=50) and PE (n=50)]. RESULTS At autopsy, lung architecture was in advance of gestational age in 5% of AI infants versus 40% of PE infants (P<0.001). In survivors, the groups were similar in age and Apgar scores. At birth, 40% of the AI group required continuous positive airway pressure or mechanical ventilation versus 24% of the PE group (NS). However, 24 hours later, only 1 AI infant had deteriorated compared to 40% of PE infants (P<0.05). CONCLUSIONS Accelerated morphologic lung maturation in preterm PE infants does not translate into improved postnatal respiratory function. Most likely, this is due to a relative lack of surfactant, ascribable to low stimulant cytokine and high TNF-alpha levels. An intrauterine history supplemented by an antenatal cytokine profile could identify an increased exogeneous surfactant need in preterm infants exposed to PE.
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Affiliation(s)
- Jörg Ersch
- Department of Neonatology, University Hospital Zurich, Switzerland
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Ugwumadu A, Manyonda I, Reid F, Hay P. Effect of early oral clindamycin on late miscarriage and preterm delivery in asymptomatic women with abnormal vaginal flora and bacterial vaginosis: a randomised controlled trial. Lancet 2003; 361:983-8. [PMID: 12660054 DOI: 10.1016/s0140-6736(03)12823-1] [Citation(s) in RCA: 255] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND Abnormal vaginal flora and bacterial vaginosis are associated with amplified risks of late miscarriage and spontaneous preterm delivery. We aimed to establish whether antibiotic treatment early in the second trimester might reduce these risks in a general obstetric population. METHODS We screened 6120 pregnant women attending hospital for their first antenatal visit--who were at 12-22 weeks' gestation (mean 15.6 weeks)--for bacterial vaginosis or abnormal vaginal flora. We used gram-stained slides of vaginal smears to diagnose abnormal vaginal flora or bacterial vaginosis, in accordance with Nugent's criteria. We randomly allocated 494 women with one of these signs to receive either clindamycin 300 mg or placebo orally twice daily for 5 days. Primary endpoints were spontaneous preterm delivery (birth > or =24 but <37 weeks) and late miscarriage (pregnancy loss > or =13 but <24 weeks). Analysis was intention to treat. FINDINGS Nine women were lost to follow-up or had elective termination. Thus, we analysed 485 women with complete outcome data. Women receiving clindamycin had significantly fewer miscarriages or preterm deliveries (13/244) than did those in the placebo group (38/241; percentage difference 10.4%, 95% CI 5.0-15.8, p=0.0003). Clindamycin also reduced adverse outcomes across the range of abnormal Nugent scores, with maximum effect in women with the highest Nugent score of 10. INTERPRETATION Treatment of asymptomatic abnormal vaginal flora and bacterial vaginosis with oral clindamycin early in the second trimester significantly reduces the rate of late miscarriage and spontaneous preterm birth in a general obstetric population.
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Affiliation(s)
- Austin Ugwumadu
- Department of Obstetrics and Gynaecology, St George's Hospital, Blackshaw Road, SW17 0QT, London, UK.
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Abstract
The limited available evidence supports a strong association of chorioamnionitis with neonatal encephalopathy and CP in the term infant. The association of chorioamnionitis with depressed Apgar scores or neonatal seizures and with CP is equivocal in the preterm infant. Different study results may be related to differences in study populations, perhaps specifically to differences in susceptibility by stages of neurologic development as well as differences in gene frequencies associated with inflammation and thrombophilia. We require further understanding of the normal roles of cytokines in brain development, pregnancy, and inflammatory homeostasis before clinical interventions directed at cytokines, their receptors, or the inflammatory process are considered.
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Affiliation(s)
- Rodney E Willoughby
- Eudowood Division of Pediatric Infectious Diseases, Department of Pediatrics, Johns Hopkins University, 600 N. Wolfe St., Park 256, Baltimore, MD 21287-4933, USA.
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Wu YW. Systematic review of chorioamnionitis and cerebral palsy. MENTAL RETARDATION AND DEVELOPMENTAL DISABILITIES RESEARCH REVIEWS 2002; 8:25-9. [PMID: 11921383 DOI: 10.1002/mrdd.10003] [Citation(s) in RCA: 178] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In a recent meta-analysis evaluating the relationship between chorioamnionitis and cerebral palsy, we found that chorioamnionitis is a risk factor for both cerebral palsy and cystic periventricular leukomalacia (cPVL). The current paper extends the meta-analysis by including studies published in the year 2000, and by further evaluating the causes of heterogeneity among individual study results. Using a random effects model, clinical chorioamnionitis was significantly associated with both cerebral palsy (RR 1.9, 95% CI 1.5-2.5) and cPVL (RR 2.6, 95% CI 1.7-3.9). Sources of heterogeneity included widely varying practices in the diagnosis of clinical chorioamnionitis, different gestational age characteristics, and varying study year. We conclude that based on the available literature, chorioamnionitis is a risk factor for both cerebral palsy and cPVL.
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Affiliation(s)
- Yvonne W Wu
- Department of Neurology, University of California at San Francisco, San Francisco, California 94143-0136, USA.
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Teberg AJ, Hodgman JE, Barton L, Chan LS. Nursery survival for infants of birth weight 500-1500 grams during 1982-1995. J Perinatol 2001; 21:97-106. [PMID: 11324368 DOI: 10.1038/sj.jp.7200480] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To evaluate nursery survival of very low birth weight infants (VLBW) over time, born in the same large inner-city hospital with a predominantly Hispanic population. METHODS All liveborn VLBW infants weighing 500-1500 g at birth were included in four time periods of 2 years' duration during 1982 to 1995. Demographics were collected for the obstetric population. Clinical data were collected including maternal and infant perinatal factors. All infants were assigned a cause of death and infants dying with lethal anomalies were then excluded from further evaluations. RESULTS Overall survival improved progressively (p = 0.0001) with dramatic improvement in survival of infants 500-750 g birth weight (BW) in period 4 (1994-1995). The number of lethal anomalies did not increase but accounted for a larger portion of deaths in period 4. Decreases in other causes of death over time reflected changes in perinatal care. Although the mothers were high-risk, none of the maternal factors evaluated showed any consistent effect on infant survival. Improved labor and delivery care was associated with improvement in Apgar scores, a decrease in intracranial hemorrhage/intraventricular hemorrhage as a cause of death and an improvement in survival between the first two periods. In spite of the increase in Cesarean sections for infants of 500-750 g BW and their improved survival in period 4, no clear advantage for Cesarean section could be demonstrated. The marked improvement seen in period 4 was associated with three changes in care: increased use of maternal steroids, administration of surfactant, and the use of newer ventilatory methods including high-frequency oscillatory ventilation. Although female gender has been reported to confer a protective influence for survival, this was not found in the final period. Black mothers comprised only about 2.5% of the total obstetric population but delivered approximately 10% of the VLBW infants. Despite the increased incidence of small for gestational age (SGA) among black infants, there were no differences in survival between blacks and Hispanics. Mean birth weight and gestational age in both survivors and nonsurvivors decreased significantly over the four time periods. In period 4, 50% survival occurred at a birth weight of 600-700 g and a gestational age of 23 weeks. CONCLUSION Nursery survival improved throughout the period of the study from 1982 to 1995 but especially during period 4 (1994-1995). Improved survival was associated with changes in both maternal and infant care. In infants of BW 500-750 g, gestational age rather than birth weight was more closely associated with survival.
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Affiliation(s)
- A J Teberg
- Departments of Pediatrics and Biostatistics, Division of Newborn Medicine, Keck School of Medicine of the University of Southern California, CA, USA
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Evans DJ, Levene MI. Evidence of selection bias in preterm survival studies: a systematic review. Arch Dis Child Fetal Neonatal Ed 2001; 84:F79-84. [PMID: 11207220 PMCID: PMC1721223 DOI: 10.1136/fn.84.2.f79] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To determine by how much selection bias in preterm infant cohort studies results in an overestimate of survival. DESIGN Systematic review of studies reporting survival in infants less than 28 weeks of gestation published 1978-1998. Studies were graded according to cohort definition: A, stillbirths and live births; B, live births; C, neonatal unit admissions. Proportions of infants surviving to discharge were calculated for each week of gestation. RESULTS Sixty seven studies report data on 55 cohorts (16 grade A, 23 grade B, 16 grade C). Studies that are more selective report significantly higher survival between 23 and 26 weeks of gestation (grade C > grade B > grade A, p < 0.01), exaggerating survival by 100% and 56% at 23 and 24 weeks respectively. CONCLUSION To minimise the potential for overestimating survival around the limits of viability, future studies should endeavour to report the outcome of all pregnancies for each week of gestation (terminations, miscarriages, stillbirths, and all live births).
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Affiliation(s)
- D J Evans
- Centre for Reproduction, Growth and Development, University of Leeds, D Floor Clarendon Wing, The General Infirmary at Leeds, Leeds LS2 9NS, UK.
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Cincotta RB, Gray PH, Phythian G, Rogers YM, Chan FY. Long term outcome of twin-twin transfusion syndrome. Arch Dis Child Fetal Neonatal Ed 2000; 83:F171-6. [PMID: 11040163 PMCID: PMC1721175 DOI: 10.1136/fn.83.3.f171] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIMS To compare the perinatal mortality and morbidity of infants with twin-twin transfusion syndrome (TTTS) with those of gestation matched twin controls and to assess the neurodevelopmental outcome of surviving twins with TTTS. METHODS A cohort of 17 consecutive pregnancies with TTTS was enrolled over three years together with gestation matched twin pregnancies unaffected by TTTS. Serial amnioreduction for the TTTS pregnancies was performed as appropriate. Perinatal death and neonatal morbidities were recorded for both the TTTS cohort and controls. The TTTS survivors had neurodevelopmental follow up to at least 2 years of age. RESULTS In 12 of the pregnancies, serial amniocenteses were performed, but, in five, the infants were born before intervention. The mean gestational age at delivery was 29.1 weeks (range 23-36). There were five intrauterine deaths in the TTTS cohort and six neonatal deaths (survival 68%). In the control group, there was one intrauterine death and five neonatal deaths (survival 82%). Infants in the TTTS group had a greater requirement for inotropes (p = 0.04) and a higher incidence of renal failure (p = 0.005). Periventricular leucomalacia and cerebral atrophy were seen in 17% of the TTTS group, but none of the controls (p = 0.03). The 23 surviving TTTS infants were all followed up, with 22% having significant neurological morbidity: cerebral palsy and global developmental delay. CONCLUSIONS Twins with TTTS have high perinatal mortality and neonatal morbidity, and long term neurodevelopmental morbidity in survivors is high. Further investigation into the pathogenesis and management of TTTS is required.
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Affiliation(s)
- R B Cincotta
- Department of Maternal-Fetal Medicine, Mater Mother's Hospital, Raymond Terrace, South Brisbane, Queensland, Australia.
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Abstract
The balance of current evidence indicates that intrauterine exposure to infection and inflammation contributes to the risk of cerebral palsy. The mechanisms involved are not well understood and may differ in very immature versus term infants. Term infants exposed to maternal infection are predisposed to delivery room depression and neonatal encephalopathy.
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Affiliation(s)
- K B Nelson
- Neuroepidemiology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.
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