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Vinograd A, Wainstock T, Sergienko R, Simon-Tuval T, Yoles I. The association between normal 50-g glucose challenge test results and risk for future metabolic morbidities: A retrospective cohort study. Int J Gynaecol Obstet 2023; 163:265-270. [PMID: 37078487 DOI: 10.1002/ijgo.14803] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 03/27/2023] [Accepted: 03/31/2023] [Indexed: 04/21/2023]
Abstract
OBJECTIVE To study the association between normal glucose challenge test (GCT) results during pregnancy and the incidence of future maternal metabolic morbidities. METHOD This was a population-based retrospective cohort study conducted between the years 2005 and 2020. The study included all women aged 17-55 years who underwent GCT as part of the routine prenatal care at the Central District of Clalit Health Services, Israel. The highest GCT result per woman was categorized into five study groups: <120 (reference), 120-129, 130-139, 140-149, and ≥150 mg/dL. Adjusted hazard ratios of the study groups for metabolic morbidities were calculated with Cox proportional survival analysis models. RESULTS Among a total of 77 568 women participants, 53%, 12.3%, and 10.3% had normal GCT results of <120, 120-129, and 130-139 mg/dL, respectively. During the study period of 6.07 ± 4.35 years, 13 151 (17.0%) cases of metabolic morbidities were documented. High-normal GCT results of 120-129 and 130-139 mg/dL were significantly associated with increased risk for future metabolic morbidity compared with <120 mg/dL (adjusted hazard ratio [aHR] 1.15, 95% confidence interval [CI] 1.08-1.22 and aHR 1.32, 95% CI 1.24-1.41, respectively). CONCLUSION Although GCT is only recommended as a screening tool for gestational diabetes mellitus, high results, even within the normal range, may point to maternal increased risk for future metabolic morbidity.
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Affiliation(s)
- Adi Vinograd
- Department of Public Health, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Tamar Wainstock
- Department of Public Health, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Ruslan Sergienko
- Department of Public Health, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Tzahit Simon-Tuval
- Department of Health Policy and Management, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Israel Yoles
- Central District, Clalit Health Services, Rishon Le-Tzion, Israel
- Department of Obstetrics and Gynecology, Soroka University Medical Center, Beer-Sheva, Israel
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Krittanawong C, Maitra NS, Hassan Virk HU, Farrell A, Hamzeh I, Arya B, Pressman GS, Wang Z, Marwick TH. Normal Ranges of Right Atrial Strain: A Systematic Review and Meta-Analysis. JACC Cardiovasc Imaging 2023; 16:282-94. [PMID: 36648033 DOI: 10.1016/j.jcmg.2022.06.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 06/10/2022] [Accepted: 06/30/2022] [Indexed: 01/18/2023]
Abstract
BACKGROUND Standard measures for the clinical assessment of right atrial (RA) function are lacking. OBJECTIVES In this systematic review and meta-analysis, the authors sought to report a reference range for RA deformation parameters in healthy subjects and to identify factors that contribute to reported variations. METHODS The authors conducted a comprehensive search of MEDLINE; MEDLINE In-Process & Other Non-Indexed Citations; Embase; Scopus; and the Cochrane Central Register of Controlled Trials from database inception through October 2021. Studies were included if they reported RA strain or strain rate (SR) using 2-dimensional speckle-tracking echocardiography in healthy volunteers or apparently healthy control patients. Data were extracted by 1 reviewer and then reviewed by 2 independent reviewers. Conflicts were resolved through consensus. Data were combined using the method developed by Siegel and adjusted using the restricted maximum likelihood random-effects model. The normal range was defined as the 95% CI of the mean. Heterogeneity was assessed by the Cochran Q-statistic and the inconsistency index (I2). The quality of the included studies and publication bias were assessed. Effects of clinical variables were sought in a metaregression. RESULTS The search identified 4,111 subjects from 21 studies. The average RA reservoir strain was 44% (95% CI: 25%-63%), contractile strain was 17% (95% CI: 2%-32%), and conduit strain was 18% (95% CI: 7%-28%), with significant between-study heterogeneity and inconsistency. The systolic SR was 2.1 s-1 (95% CI: 0.9-3.4 s-1), early-diastolic SR was -2.0 s-1 (95% CI: -3.3 to -0.8 s-1), and late-diastolic SR was -1.9 s-1 (95% CI: -2.4 to -1.3 s-1), with nonsignificant heterogeneity and inconsistency. Ranges remained wide in healthy volunteers. The metaregression identified only age as significantly associated with systolic SR and no other significant determinants of variation among normal ranges of strain. CONCLUSIONS There are wide reference ranges for RA deformation, and these may limit the utility of this test in clinical practice.
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Chen Y, Wang W, Wang J, Chen X, Zhu Z, Li J, He M. Normal range of ocular biometry in healthy children: A systemic review and meta-analysis of 33,559 individuals under seven years of age. Ophthalmic Physiol Opt 2022; 42:1264-1275. [PMID: 36062302 DOI: 10.1111/opo.13043] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 08/05/2022] [Accepted: 08/07/2022] [Indexed: 11/28/2022]
Abstract
PURPOSE To conduct a systemic review and meta-analysis on the normative range of ocular biometry in healthy children under seven years of age. METHODS A literature search was performed using the PubMed (MEDLINE) database. The main outcomes were normative values of axial length (AL), central corneal thickness (CCT), cornea curvature (CC), anterior chamber depth (ACD), lens thickness (LT) and vitreous chamber depth (VCD). Pooled estimates were obtained with a random-effects meta-analysis. Multivariate meta-regressions ascertained the moderator-related trends. RESULTS We included 47 studies for a total of 33,559 subjects. The pooled ALs for 0.0-1.9 years, 2.0-3.9 years and 4.0-6.9 years were 18.33 mm (95% confidence interval [CI] 17.57-19.09), 21.71 mm (21.49-21.93) and 22.37 mm (22.29-22.45), respectively. Children aged 0.0-1.9 years had a greater CCT (576.70 μm, 567.20-586.21), steeper cornea (7.41 mm, 7.16-7.65) and shallower ACD (2.46 mm, 2.23-2.69). LT ranged from 3.65 to 3.74 mm for 0-6 years, and VCD increased from 11.94 mm at birth to 15.36 mm at 4.0-6.9 years. Differences in AL between East Asian and non-East Asian children were found below two years of age (17.30 mm vs. 18.40 mm, p = 0.008) and for CC at 4.0-6.9 years of age (7.82 mm vs. 7.79 mm, p = 0.004). In a multivariate meta-regression, AL, CC, ACD and VCD increased with age (p < 0.05 for all), while CCT decreased with age (p = 0.0007). CONCLUSIONS This study reports normative data for ocular biometry in children. Few differences were found with ethnicity in the ocular biometry of infants and pre-schoolers.
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Affiliation(s)
- Yanxian Chen
- Peking University Shenzhen Hospital, Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center, Shenzhen, China
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Wei Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Jun Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
| | - Xu Chen
- Peking University Shenzhen Hospital, Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center, Shenzhen, China
| | - Zhuoting Zhu
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Jinying Li
- Peking University Shenzhen Hospital, Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center, Shenzhen, China
| | - Mingguang He
- Peking University Shenzhen Hospital, Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center, Shenzhen, China
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, China
- Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Melbourne, Australia
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Borriello F, Pasquarelli N, Law L, Rand K, Raposo C, Wei W, Craveiro L, Derfuss T. Normal B cell ranges in infants: A systematic review and meta-analysis. J Allergy Clin Immunol 2022:S0091-6749(22)00835-1. [PMID: 35728653 DOI: 10.1016/j.jaci.2022.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 06/07/2022] [Accepted: 06/14/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND During the first year of life, B cell level is a valuable indicator of whether external factors, such as exposure to B cell depleting therapies, have an adverse impact on immune system development. However, there are no standard reference ranges of B cell levels in healthy infants by age. OBJECTIVE To estimate the normal range of B cell levels in infants, by age, during the first year of life, by pooling data from published studies. METHODS Studies reporting B cell levels measured using flow cytometry and CD19 markers in healthy infants were identified via a systematic literature review. Quality and feasibility assessments determined suitability for inclusion in meta-analyses by age group and/or continuous age. Means and normal ranges (2.5th-97.5th percentile) were estimated for absolute and percentage B cell levels. Sensitivity analyses assessed the impact of various assumptions. RESULTS Of 37 relevant studies identified, 28 were included in at least 1 meta-analysis. Means and normal ranges of B cell levels were found to be 707 (123-2324) cells/μL in cord blood, 508 (132-1369) cells/μL at age 0-1 month, 1493 (416-3877) cells/μL at age 1-6 months and 1474 (416-3805) cells/μL at age >6 months. The continuous age model showed that B cell levels peaked at week 26. Trends were similar for the percentage B cell estimates and in sensitivity analyses. CONCLUSION These meta-analyses provide the first normal reference ranges for B cell levels in infants, by week of age, during the first year of life.
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Hadi SS, Kareem TF, Kamal AM. Normal values of angle and distance between the superior mesenteric artery and aorta in Iraqi population: A single centre study. J Med Radiat Sci 2022; 69:191-197. [PMID: 34898028 PMCID: PMC9163471 DOI: 10.1002/jmrs.561] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 11/20/2021] [Accepted: 11/22/2021] [Indexed: 11/07/2022] Open
Abstract
INTRODUCTION The diagnosis of the superior mesenteric syndrome depends on measuring the distance and angle between the superior mesenteric artery (SMA) and aorta on CT scan in the presence of duodenal compression. Studies examining the normal range of these measurements are scarce and none of them was conducted on the Iraqi population. The aim of this study was to assess the values of aorto-SMA angle (AMA) and aorto-SMA distance (AMD) in asymptomatic patients to define the normal range in the Iraqi population and to compare it with the normal published range and different demographical values and body mass index (BMI). METHODS A total of 333 patients referred to arterial phase CT examinations for reasons unrelated to gastrointestinal tract were recruited. On axial and reformatted sagittal-oblique images, the angle and the distance between SMA and aorta were measured at the location where the duodenum crosses. RESULTS Both AMA and AMD had a wider range 10-147° and 4-44 mm, respectively, compared to the literature reported range. There was a significant reduction in AMA and AMD values in underweight participants (AMA, P < 0.001; and AMD, P = 0.014) and in female patients (AMA and AMD, P < 0.0001) and those who were younger than 20 (AMA, P = 0.014; and AMD, P = 0.001). A moderate correlation (r = 0.507, P < 0.0001) was found between AMA and AMD values. The correlation of BMI with AMD values was moderate (r = 0.46), and with AMA was weak (r = 0.23) (P < 0.0001). CONCLUSION Very low values of AMA and AMD can occur in normal asymptomatic patients without compressing the duodenum, which warrants further follow-up studies. Evaluating normal values of AMA and AMD in the Iraqi population can help in providing a reference for CT-based diagnosis of SMA syndrome.
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Hosseinsabet A, Mahmoudian R, Jalali A, Mohseni-Badalabadi R, Davarpasand T. Normal Ranges of Right Atrial Strain and Strain Rate by Two-Dimensional Speckle-Tracking Echocardiography: A Systematic Review and Meta-Analysis. Front Cardiovasc Med 2022; 8:771647. [PMID: 34977185 PMCID: PMC8718502 DOI: 10.3389/fcvm.2021.771647] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 09/06/2021] [Accepted: 11/24/2021] [Indexed: 01/31/2023] Open
Abstract
Background: Normal range values of right atrial (RA) phasic function markers are essential for the identification of normal and abnormal values, comparison with reference values, and the clinical meaning of obtained values. Accordingly, we aimed to define the normal range values of RA phasic function markers obtained by 2D speckle-tracking echocardiography through a meta-analysis and determine the main sources of heterogeneity among reported values. Methods: PUBMED, SCOPUS, and EMBASE databases were searched for the following keywords: "right atrial/right atrium" and "strain/speckle/deformation" and "echocardiography." Studies were selected that included a human healthy adult group without any cardiovascular diseases or risk factors and that were written in the English language. For the calculation of each marker of RA phasic functions, a random-effect model was used. Meta-regression was employed to define the major sources of variabilities among reported values. Results: Fifteen studies that included 2,469 healthy subjects were selected for analysis. The normal range values for RA strain and strain rate were 42.7% (95% CI, 39.4 to 45.9%) and 2.1 s-1 (95% CI, 2.0 to 2.1 s-1) during the reservoir phase, respectively, 23.6% (95% CI, 20.7 to 26.6%) and -1.9 s-1 (95% CI, -2.2 to -1.7 s-1) during the conduit phase, correspondingly, and 16.1% (95% CI, 13.6 to 18.6%) and -1.8 s-1 (95% CI, -2.0 to -1.5 s-1) during the contraction phase, respectively. The sources of heterogeneity for the normal range of these markers were the number of participants, the type of software, the method of global value calculation, the right ventricular fractional area change, the left ventricular (LV) ejection fraction, the RA volume index, sex, the heart rate, the diastolic blood pressure, the body mass index, and the body surface area. Conclusions: Using 2D speckle-tracking echocardiography, we defined normal values for RA phasic function markers and identified the sources of heterogeneity as demographic, anthropometric, hemodynamic, and echocardiography factors. Systematic Review Registration: https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42021236578, identifier: CRD42021236578.
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Affiliation(s)
- Ali Hosseinsabet
- Department of Cardiology, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Roshanak Mahmoudian
- Department of Cardiology, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Arash Jalali
- Department of Research, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Mohseni-Badalabadi
- Department of Cardiology, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Tahereh Davarpasand
- Department of Cardiology, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
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Abstract
Although the term "fever" is used liberally in clinical publications, we provide evidence that it is rarely defined in terms of the minimum temperature used to qualify as a fever, the type of thermometer employed in measuring patients' temperatures, or the site at which temperatures are taken. We maintain that in the absence of such information, the term "fever" is meaningless.
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Affiliation(s)
- Philip A Mackowiak
- Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Frank A Chervenak
- Department of Obstetrics and Gynecology, Zucker School of Medicine at Hofstra/Northwell, Manhasset, New York, USA
| | - Amos Grünebaum
- Department of Obstetrics and Gynecology, Zucker School of Medicine at Hofstra/Northwell, Manhasset, New York, USA
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Raisi-Estabragh Z, Kenawy AAM, Aung N, Cooper J, Munroe PB, Harvey NC, Petersen SE, Khanji MY. Variation in left ventricular cardiac magnetic resonance normal reference ranges: systematic review and meta-analysis. Eur Heart J Cardiovasc Imaging 2021; 22:494-504. [PMID: 32460308 PMCID: PMC8081427 DOI: 10.1093/ehjci/jeaa089] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 03/09/2020] [Accepted: 04/09/2020] [Indexed: 12/29/2022] Open
Abstract
AIMS To determine population-related and technical sources of variation in cardiac magnetic resonance (CMR) reference ranges for left ventricular (LV) quantification through a formal systematic review and meta-analysis. METHODS AND RESULTS This study is registered with the International Prospective Register of Systematic Reviews (CRD42019147161). Relevant studies were identified through electronic searches and assessed by two independent reviewers based on predefined criteria. Fifteen studies comprising 2132 women and 1890 men aged 20-91 years are included in the analysis. Pooled LV reference ranges calculated using random effects meta-analysis with inverse variance weighting revealed significant differences by age, sex, and ethnicity. Men had larger LV volumes and higher LV mass than women [LV end-diastolic volume (mean difference = 6.1 mL/m2, P-value = 0.014), LV end-systolic volume (MD = 4 mL/m2, P-value = 0.033), LV mass (mean difference = 12 g/m2, P-value = 7.8 × 10-9)]. Younger individuals had larger LV end-diastolic volumes than older ages (20-40 years vs. ≥65 years: women MD = 14.0 mL/m2, men MD = 14.7 mL/m2). East Asians (Chinese, Korean, Singaporean-Chinese, n = 514) had lower LV mass than Caucasians (women: MD = 6.4 g/m2, P-value = 0.016; men: MD = 9.8 g/m2, P-value = 6.7 × 10-5). Between-study heterogeneity was high for all LV parameters despite stratification by population-related factors. Sensitivity analyses identified differences in contouring methodology, magnet strength, and post-processing software as potential sources of heterogeneity. CONCLUSION There is significant variation between CMR normal reference ranges due to multiple population-related and technical factors. Whilst there is need for population-stratified reference ranges, limited sample sizes and technical heterogeneity precludes derivation of meaningful unified ranges from existing reports. Wider representation of different populations and standardization of image analysis is urgently needed to establish such reference distributions.
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Affiliation(s)
- Zahra Raisi-Estabragh
- William Harvey Research Institute, NIHR Barts Biomedical Research Centre, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
- Barts Heart Centre, St Bartholomew’s Hospital, Barts Health NHS Trust, West Smithfield, London EC1A 7BE, UK
| | - Asmaa A M Kenawy
- William Harvey Research Institute, NIHR Barts Biomedical Research Centre, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
- Barts Heart Centre, St Bartholomew’s Hospital, Barts Health NHS Trust, West Smithfield, London EC1A 7BE, UK
| | - Nay Aung
- William Harvey Research Institute, NIHR Barts Biomedical Research Centre, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
- Barts Heart Centre, St Bartholomew’s Hospital, Barts Health NHS Trust, West Smithfield, London EC1A 7BE, UK
| | - Jackie Cooper
- William Harvey Research Institute, NIHR Barts Biomedical Research Centre, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
| | - Patricia B Munroe
- William Harvey Research Institute, NIHR Barts Biomedical Research Centre, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
| | - Nicholas C Harvey
- MRC Lifecourse Epidemiology Unit (MRCLEU), Tremona Rd, Southampton SO16 6YD, UK
- NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Tremona Road, Southampton, SO16 6YD, UK
| | - Steffen E Petersen
- William Harvey Research Institute, NIHR Barts Biomedical Research Centre, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
- Barts Heart Centre, St Bartholomew’s Hospital, Barts Health NHS Trust, West Smithfield, London EC1A 7BE, UK
| | - Mohammed Y Khanji
- William Harvey Research Institute, NIHR Barts Biomedical Research Centre, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK
- Barts Heart Centre, St Bartholomew’s Hospital, Barts Health NHS Trust, West Smithfield, London EC1A 7BE, UK
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Bao X, Wang Y, Zhang S, Yang L, Liu G, Yang Y, Li X, Hao D, Chen A, Liu X, Shao J. Establishment of a personalized fetal growth curve model. Technol Health Care 2021; 29:311-317. [PMID: 33682767 PMCID: PMC8150511 DOI: 10.3233/thc-218028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 11/23/2022]
Abstract
BACKGROUND: Fetal weight is one of the important indicators for judging whether fetal growth and development are normal. Fetal weight exceeding the normal range may lead to poor delivery outcomes. OBJECTIVE: We aimed to establish a personalized fetal growth curve in order to effectively monitor fetal growth during pregnancy. Fetal weight can be monitored while fetal growth and development are assessed. METHODS: This study retrospectively analyzed the birth weight and ultrasound database of 3,093 newborns delivered at normal term. The personalized fetal growth curve model was generated based on the birth weight formula established by Gardosi combined with the proportional weight equation. RESULTS: (1) The average birth weight of the single fetus at normal term was 3,457g. (2) According to the regression results of the proportion of fetal weight in full-term pregnancy and gestational week, the proportional weight equation is Weight% = 500.9 - 51.60GA + 1.727GA2- 0.01718GA3 (GA is gestational week), R2 is 98%, P< 0.001. CONCLUSIONS: In this study, the normal birth weight of newborns and normal range of fetal weight can be estimated by using the personalized fetal growth curve model.
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Affiliation(s)
- Xinyu Bao
- Faculty of Environment and Life Sciences, Beijing University of Technology, Beijing 100124, China.,Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Beijing 100124, China
| | - Yan Wang
- Peking University People's Hospital, Beijing 100044, China
| | - Song Zhang
- Faculty of Environment and Life Sciences, Beijing University of Technology, Beijing 100124, China.,Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Beijing 100124, China
| | - Lin Yang
- Faculty of Environment and Life Sciences, Beijing University of Technology, Beijing 100124, China.,Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Beijing 100124, China
| | - Guoli Liu
- Peking University People's Hospital, Beijing 100044, China
| | - Yimin Yang
- Faculty of Environment and Life Sciences, Beijing University of Technology, Beijing 100124, China.,Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Beijing 100124, China
| | - Xuwen Li
- Faculty of Environment and Life Sciences, Beijing University of Technology, Beijing 100124, China.,Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Beijing 100124, China
| | - Dongmei Hao
- Faculty of Environment and Life Sciences, Beijing University of Technology, Beijing 100124, China.,Beijing International Science and Technology Cooperation Base for Intelligent Physiological Measurement and Clinical Transformation, Beijing 100124, China
| | - Aiqing Chen
- Beijing Yes Medical Devices Co. Ltd., Beijing 100152, China
| | - Xiaohong Liu
- Beijing Yes Medical Devices Co. Ltd., Beijing 100152, China
| | - Jing Shao
- Beijing Yes Medical Devices Co. Ltd., Beijing 100152, China
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Ajmera P, Prasad N. Comparison of Tracheal Diameter Measurements on Radiograph Versus Computed Tomography at a Tertiary Care Hospital in Pune, Central India. Cureus 2021; 13:e13755. [PMID: 33842132 PMCID: PMC8024437 DOI: 10.7759/cureus.13755] [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] [Indexed: 11/09/2022] Open
Abstract
Background Variations in tracheal diameter with respect to factors like age and gender are one of the major factors affecting the size of the endotracheal tube (ETT) preferred in a patient. It is important to pre-determine this figure because a tube of a larger size predisposes the patient for tracheal mucosal ischemia, while one of a smaller size may not ensure adequate oxygen saturation in the patient. Purpose We undertook this study to assess the accuracy of radiograph versus computed tomography (CT) and comment on whether a CT should be carried out mandatorily in all patients where intubation is needed. Materials and methods The study was undertaken at Dr DY Patil Medical College, Hospital, and Research Center, a tertiary care institute in Pune, India. A total of 217 patients in whom both chest radiograph and chest CT were performed were enrolled in the study and measurements were performed at suitable landmarks which correspond to the position of endotracheal tubes. Results The males had a mean age of 44.2 years and females of 41.7 years. The mean X-ray transverse diameter was 15.4 ± 3.2 (SD) mm, mean CT axial transverse diameter was 15.3 ± 3.4 (SD) mm, mean CT sagittal diameter was 14.8 ± 3.7 (SD) mm, and the mean CT coronal diameter was 15.2 ± 3.5(SD)mm. Conclusions There was a significant difference in mean X-ray transverse diameter (Low kV), CT axial transverse diameter, CT sagittal diameter, and CT coronal diameter between males and females. Mean values were significantly higher in males as compared to females. There was a significant difference in tracheal diameters for different age groups, irrespective of the modality. Bland-Altman analysis revealed no significant difference between chest radiograph and CT for tracheal diameter measurement.
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Affiliation(s)
- Pranav Ajmera
- Radiology, Dr DY Patil Medical College, Hospital and Research Center, Pune, IND
| | - Niharika Prasad
- Radiology, Dr DY Patil Medical College, Hospital and Research Center, Pune, IND
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Coulthard MG. Single blood pressure chart for children up to 13 years to improve the recognition of hypertension based on existing normative data. Arch Dis Child 2020; 105:778-783. [PMID: 32144092 DOI: 10.1136/archdischild-2019-317993] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 07/29/2019] [Revised: 02/06/2020] [Accepted: 02/07/2020] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To produce a single 'growth-chart-style' blood pressure (BP) chart with clear diagnostic thresholds to assist paediatricians to make prompt and accurate diagnoses of hypertension. DESIGN The well-established but complex published data on normal BP ranges in prepubertal children were identified and analysed to determine if it was possible to produce a single, user-friendly, colour-coded chart, showing diagnostic hypertension thresholds for systolic and diastolic BP without losing clinically important information. RESULTS There were sufficient published normative childhood BP data available to define systolic and diastolic BP centiles from term onwards but only sufficient to determine systolic BP centiles from 28 weeks of gestation to term. Up to 13 years of age, it was possible to combine boys' and girls' data without loss of precision and to define the threshold between stage 1 and stage 2 (severe) hypertension as the 95th centile +12 mm Hg. This allowed the production of single colour-coded charts for systolic and diastolic BP and to advise on making simple adjustments for the impact of stature on individual children's results. CONCLUSIONS A simplified, integrated BP chart with colour-coded diagnostic thresholds was produced to assist the prompt diagnosis of hypertension in prepubertal children. This information could be included into a Paediatric Early Warning System score.
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Affiliation(s)
- Macolm G Coulthard
- Department of Paediatric Nephrology, Great North Children's Hospital, Newcastle, UK
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12
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Albrethsen J, Johannsen TH, Jørgensen N, Frederiksen H, Sennels HP, Jørgensen HL, Fahrenkrug J, Petersen JH, Linneberg A, Nordkap L, Bang AK, Andersson AM, Juul A. Evaluation of Serum Insulin-like Factor 3 Quantification by LC-MS/MS as a Biomarker of Leydig Cell Function. J Clin Endocrinol Metab 2020; 105:5811414. [PMID: 32211773 DOI: 10.1210/clinem/dgaa145] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 03/23/2020] [Indexed: 12/27/2022]
Abstract
BACKGROUND The peptide hormone insulin-like factor 3 (INSL3) is a marker for Leydig cell function and the clinical use of serum INSL3 measurements has been suggested by several groups. AIM (1) To establish a reference range for liquid chromatography-tandem mass spectrometry (LC-MS/MS) of serum INSL3 in healthy boys and men; and (2) to compare the associations of serum INSL3 and testosterone (T) to pubertal stage, lifestyle factors, diurnal variation, body composition, and human chorionic gonadotropin (hCG) stimulation. RESULTS In a reference range based on LC-MS/MS analysis of serum from 1073 boys and men, INSL3 increased from levels close to the detection limit (0.03 µg/L) in prepubertal boys to a maximum mean level of 1.3 µg/L (95% CI, 0.9-2.7) in young men (19-40 years of age) and decreased slightly in older men (0.1 µg/L per decade). Serum T, but not INSL3, was associated with body mass index or body fat percentage and with alcohol consumption. Smoking was positively associated with serum T, but negatively associated with INSL3. There were significant diurnal variations in both INSL3 and T in men (P < 0.001), but serum INSL3 varied substantially less, compared with serum T (± 11% vs ± 26%). Mean serum INSL3 increased after hCG stimulation, but less than T (+ 17% vs + 53%). In both healthy men and in patients suspected of testicular failure, baseline serum INSL3 was more closely associated to the hCG-induced increase in serum T than baseline T itself. CONCLUSION Measurement of serum INSL3 by LC-MS/MS has promise as a marker of testicular disorders.
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Affiliation(s)
- Jakob Albrethsen
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- International Centre for Research and Research Training in Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Trine Holm Johannsen
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- International Centre for Research and Research Training in Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Niels Jørgensen
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- International Centre for Research and Research Training in Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Hanne Frederiksen
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- International Centre for Research and Research Training in Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Henriette P Sennels
- Department of Clinical Biochemistry, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Henrik Loevendahl Jørgensen
- Department of Clinical Biochemistry, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Jan Fahrenkrug
- Department of Clinical Biochemistry, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Jørgen Holm Petersen
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- Department of Biostatistics, University of Copenhagen, Denmark
| | - Allan Linneberg
- Center for Clinical Research and Disease Prevention, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Loa Nordkap
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- International Centre for Research and Research Training in Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Anne Kirstine Bang
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- International Centre for Research and Research Training in Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Anna-Maria Andersson
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- International Centre for Research and Research Training in Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Anders Juul
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- International Centre for Research and Research Training in Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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13
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Abstract
Predicted values for pulmonary function tests differ significantly from the reference values used for many other diagnostic tests. Historically, simple equations using age, height, and sex were used to "predict" normal lung function. However, these multiple factors interact in complex ways to determine what the expected lung function values are in healthy subjects. Healthy individuals exhibit a wide range of variability for most pulmonary function variables, and this variability is not consistent across all age ranges. Recent analysis of large groups of healthy subjects has allowed the development of sophisticated prediction models that take into account not only variability but also skew that occurs as the lungs develop and mature. These modern reference equations provide uninterrupted expected values from early childhood, through adolescence and adulthood, and extending into the ninth decade. Modern equations use upper and lower limits of normal to offer a statistically robust means of defining who is within normal limits. Despite these advances, interpretation of pulmonary function test results has not been highly standardized, largely because interpretation depends on the reference equations used and, more importantly, how they are applied. This review discusses the strengths and limitations of using reference equations to interpret pulmonary function data in the context of research and clinical practice.
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Affiliation(s)
- Jeffrey M Haynes
- Pulmonary Function Laboratory, St. Joseph Hospital, Nashua, New Hampshire.
| | - David A Kaminsky
- Division of Pulmonary and Critical Care Medicine, University of Vermont College of Medicine, Burlington, Vermont
| | - Sanja Stanojevic
- Translational Medicine Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Gregg L Ruppel
- Division of Pulmonary, Critical Care and Sleep Medicine, St. Louis University, St. Louis, Missouri
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14
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He YD, Xu BN, Song D, Wang YQ, Yu F, Chen Q, Zhao MH. Normal range of complement components during pregnancy: A prospective study. Am J Reprod Immunol 2019; 83:e13202. [PMID: 31646704 PMCID: PMC7027513 DOI: 10.1111/aji.13202] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 03/16/2019] [Revised: 10/03/2019] [Accepted: 10/18/2019] [Indexed: 12/14/2022] Open
Abstract
Problem The complement system plays a key role in normal placentation, and delicate regulation of complement system activation is critical for successful pregnancy. Therefore, establishing a normal range of complement components during pregnancy is important for clinical evaluation and research. Methods We performed a prospective study to investigate the normal range of complement components in circulation during different stages of pregnancy. Plasma concentrations of complement factor B (CFB), C1q, complement factor H (CFH), C3, C3c, and C4 were measured using an immunoturbidimetric assay; mannan‐binding lectin (MBL), C3a, C5a, and soluble C5b‐9 (sC5b‐9) levels at different time points of pregnancy were determined by enzyme‐linked immunosorbent assay (ELISA). Results A total of 733 plasma samples were collected from 362 women with a normal pregnancy and 65 samples from non‐pregnant women. In the first trimester of pregnancy, the levels of CFB, CFH, MBL, C3c, C4, and C3a were 414.5 ± 85.9 mg/L (95% CI for mean: 402.4‐426.6 mg/L), 381.0 ± 89.0 mg/L (95% CI for mean: 368.5‐393.6 mg/L), 4274.5 ± 2752 ng/mL (95% CI for mean: 3881.1‐4656.4 ng/mL), 1346.9 ± 419.8 mg/L (95% CI for mean: 1287.7‐1406.0 mg/L), 357.4 ± 101.8 mg/L (95% CI for mean: 343.0‐371.7 mg/L), and 182.5 ± 150.0 ng/mL (95% CI for mean: 186.9‐229.1 ng/mL), respectively. The levels of C3 and C4 increased gradually throughout pregnancy. The levels of C1q, C5a, and sC5b‐9 in the first and second trimesters were nearly the same as those in non‐pregnant women. Conclusion The results of this study show that pregnancy itself may influence the plasma levels of complement system components.
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Affiliation(s)
- Ying-Dong He
- Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing, China
| | - Bing-Ning Xu
- Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing, China
| | - Di Song
- Key Laboratory of Renal Disease, Ministry of Health of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education of China, Beijing, China.,Department of Medicine, Renal Division, Peking University First Hospital, Peking University Institute of Nephrology, Beijing, China
| | - Ya-Qin Wang
- Key Laboratory of Renal Disease, Ministry of Health of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education of China, Beijing, China.,Department of Medicine, Renal Division, Peking University First Hospital, Peking University Institute of Nephrology, Beijing, China
| | - Feng Yu
- Key Laboratory of Renal Disease, Ministry of Health of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education of China, Beijing, China.,Department of Medicine, Renal Division, Peking University First Hospital, Peking University Institute of Nephrology, Beijing, China
| | - Qian Chen
- Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing, China
| | - Ming-Hui Zhao
- Key Laboratory of Renal Disease, Ministry of Health of China, Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education of China, Beijing, China.,Department of Medicine, Renal Division, Peking University First Hospital, Peking University Institute of Nephrology, Beijing, China.,Peking-Tsinghua Center for Life Sciences, Beijing, China
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15
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Fleisher TA, Rosenzweig SD. Lymphocyte reference intervals in the era of newborn screening. J Allergy Clin Immunol 2019; 144:1516-1517. [PMID: 31600546 DOI: 10.1016/j.jaci.2019.09.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 09/20/2019] [Indexed: 11/16/2022]
Affiliation(s)
- Thomas A Fleisher
- Department of Laboratory Medicine, Clinical Center, National Institutes of Health, Bethesda, Md.
| | - Sergio D Rosenzweig
- Department of Laboratory Medicine, Clinical Center, National Institutes of Health, Bethesda, Md
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16
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Xu W, Li S, Zhang Z, Hu J, Zhao Y. Prioritization of differentially expressed genes through integrating public expression data. Anim Genet 2019; 50:726-732. [PMID: 31512747 DOI: 10.1111/age.12855] [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] [Accepted: 08/06/2019] [Indexed: 11/29/2022]
Abstract
Differentially expressed gene (DEG) analysis is a major approach for interpreting phenotype differences and produces a large number of candidate genes. Given that it is burdensome to validate too many genes through benchwork, an urgent need exists for DEG prioritization. Here, a novel method is proposed for prioritizing bona fide DEGs by constructing the normal range of gene expression through integrating public expression data. Prioritization was performed by ranking the differences in cumulative probability for genes in case and control groups. DEGs from a study on pig muscle tissue were used to evaluate the prioritization accuracy. The results showed that the method reached an area under the receiver operating characteristic curve of 96.42% and can effectively shorten the list of candidate genes from a differential expression experiment to find novel causal genes. Our method can be easily extended to other tissues or species to promote functional research in broad applications.
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Affiliation(s)
- W Xu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China.,State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, 100193, China
| | - S Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China.,State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, 100193, China
| | - Z Zhang
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, 100193, China
| | - J Hu
- State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, 100193, China
| | - Y Zhao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Biological Sciences, China Agricultural University, Beijing, 100193, China.,State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, 100193, China
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17
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Charney AN, Dourmashkin JT. Interpreting clinical and laboratory tests: importance and implications of context. Diagnosis (Berl) 2019; 8:dx-2019-0009. [PMID: 31421037 DOI: 10.1515/dx-2019-0009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 02/13/2019] [Accepted: 07/31/2019] [Indexed: 02/28/2024]
Abstract
Clinical and laboratory tests in clinical medicine include a range of measurements that may be categorized as "normal range" tests, positive or negative tests, or contextual tests. Normal range test results are quantitative and are compared to a reference interval or range provided by the laboratory. Positive or negative tests are also quantitative tests and characteristically have a cutoff value that specifies the result. Contextual tests require a context, a physiological condition, to correctly interpret the result. A closer examination of reference intervals suggests that these also are contextual. The fact that there is a range of apparently normal values indicates the presence of cultural, biological, physiological and behavioral diversity in the population sampled to determine normality. As such, the reference interval describes the population from which it was determined and may have utility in this regard.
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Affiliation(s)
- Alan N Charney
- Clinical Professor, Department of Internal Medicine, NYU Langone Health, Division of Nephrology, 550 1st Avenue, New York, NY 10016, USA; and47 Laura Lane, Morristown, NJ 07960, USA
| | - Jordan T Dourmashkin
- NYU Langone Health, Ronald O. Perelman Department of Emergency Medicine, New York, NY, USA
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18
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Douxfils J, Morimont L, Bouvy C, de Saint‐Hubert M, Devalet B, Devroye C, Dincq A, Dogné J, Guldenpfennig M, Baudar J, Larock A, Lessire S, Mullier F. Assessment of the analytical performances and sample stability on ST Genesia system using the STG-DrugScreen application. J Thromb Haemost 2019; 17:1273-1287. [PMID: 31063645 PMCID: PMC6852561 DOI: 10.1111/jth.14470] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [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] [Received: 01/08/2019] [Accepted: 04/29/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND Thrombin generation testing has been used to provide information on the coagulation phenotype of patients. The most used technique is the calibrated automated thrombogram (CAT) but it suffers from a lack of standardization, preventing its implementation in routine. The ST Genesia is a new analyzer designed to assess thrombin generation based on the same principle as the CAT. Unlike the CAT system, the ST Genesia is a benchtop, fully automated analyzer, able to perform the analyses individually and not by batch, with strict control of variables such as temperature and volumes, ensuring, theoretically, maximal reproducibility. OBJECTIVES This study aimed at assessing the performance of the STG-DrugScreen application on the ST Genesia analyzer. We also aimed at exploring stability of plasma samples after freezing and defining a reference normal range. RESULTS Results demonstrated the excellent interexperiment precision of the ST Genesia and confirmed that the use of a reference plasma helps reducing the inter-experiments variability. Stability revealed that plasma samples are stable for at least 11 months at -70°C or lower, except for those containing low molecular weight heparins which have to be tested within 6 months. Freezing had no effect on the majority of thrombin generation parameters except on time to peak. CONCLUSIONS Our results suggest an easy implementation of thrombin generation with the use of ST Genesia in the routine laboratory. This will facilitate the design of multicentric studies and enable the establishment of reliable and evidence-based thresholds, which may improve the management of patients treated with anticoagulants.
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Affiliation(s)
- Jonathan Douxfils
- Department of PharmacyNamur Research Institute for Life SciencesNamur Thrombosis and Hemostasis CenterUniversity of NamurNamurBelgium
- Qualiblood s.a.NamurBelgium
| | - Laure Morimont
- Department of PharmacyNamur Research Institute for Life SciencesNamur Thrombosis and Hemostasis CenterUniversity of NamurNamurBelgium
| | | | | | - Bérangère Devalet
- Department of HematologyNamur Research Institute for Life SciencesNamur Thrombosis and Hemostasis CenterCHU UCL NamurUniversité catholique de LouvainYvoirBelgium
| | - Célia Devroye
- Hematology LaboratoryNamur Research Institute for Life SciencesNamur Thrombosis and Hemostasis CenterCHU UCL NamurUniversité catholique de LouvainYvoirBelgium
| | - Anne‐Sophie Dincq
- Department of AnesthesiologyNamur Research Institute for Life SciencesNamur Thrombosis and Hemostasis CenterCHU UCL NamurUniversité catholique de LouvainYvoirBelgium
| | - Jean‐Michel Dogné
- Department of PharmacyNamur Research Institute for Life SciencesNamur Thrombosis and Hemostasis CenterUniversity of NamurNamurBelgium
| | - Maïté Guldenpfennig
- Hematology LaboratoryNamur Research Institute for Life SciencesNamur Thrombosis and Hemostasis CenterCHU UCL NamurUniversité catholique de LouvainYvoirBelgium
| | - Justine Baudar
- Hematology LaboratoryNamur Research Institute for Life SciencesNamur Thrombosis and Hemostasis CenterCHU UCL NamurUniversité catholique de LouvainYvoirBelgium
| | - Anne‐Sophie Larock
- Department of PharmacyNamur Research Institute for Life SciencesNamur Thrombosis and Hemostasis CenterCHU UCL NamurUniversité catholique de LouvainYvoirBelgium
| | - Sarah Lessire
- Department of AnesthesiologyNamur Research Institute for Life SciencesNamur Thrombosis and Hemostasis CenterCHU UCL NamurUniversité catholique de LouvainYvoirBelgium
| | - François Mullier
- Hematology LaboratoryNamur Research Institute for Life SciencesNamur Thrombosis and Hemostasis CenterCHU UCL NamurUniversité catholique de LouvainYvoirBelgium
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19
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Cheng T, Li Y, Pang S, Wan H, Shi G, Cheng Q, Li Q, Pan Z, Huang S. Normal lung attenuation distribution and lung volume on computed tomography in a Chinese population. Int J Chron Obstruct Pulmon Dis 2019; 14:1657-1668. [PMID: 31413560 PMCID: PMC6662163 DOI: 10.2147/copd.s187596] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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] [Received: 09/14/2018] [Accepted: 05/10/2019] [Indexed: 01/17/2023] Open
Abstract
Backgroud and objectives: Although lung attenuation distribution and lung volume on computed tomography (CT) have been widely used in evaluating COPD and interstitial lung disease, there are only a few studies regarding the normal range of these indices, especially in Chinese subjects. We aimed to describe the normal range of lung attenuation distribution and lung volume based on CT. Methods: Subjects with normal lung function and basically normal chest CT findings (derivation group) at Ruijin Hospital, Shanghai (from January 2010 to June 2014) were included according to inclusion and exclusion criteria. The range of the percentage of lung volume occupied by low attenuation areas (LAA%), percentile of the histogram of attenuation values (Perc n), and total lung volume were analyzed. Relationships of these measures with demographic variables were evaluated. Participants who underwent chest CT examination for disease screening and had basically normal CT findings served as an external validation group. Results: The number of subjects in the derivation group and external validation groups were 564 and 1,787, respectively. Mean total lung volumes were 4,468±1,271 mL and 4,668±1,192 mL, and median LAA%(-950 HU) was 0.19 (0.03–0.43) and 0.17 (0.01–0.41), in the derivation and external validation groups, respectively. Reference equations for lung volume and attenuation distribution (LAA% using -1,000–210 HU, Perc 1 to Perc 98) were generated: Lung volume (mL) = -1.015 *10^4+605.3*Sex (1= male, 0= female)+92.61*Height (cm) –12.99*Weight (kg) ±1766; LAA% (-950 HU)=[0.2027+0.05926*Sex (1= male, 0= female) –4.111*10^-3*Weight (kg) +4.924*10^-3*Height (cm) +8.504*10^-4*Age]^7.341–0.05; Upper limit of normal range: [0.2027+0.05926*Sex-4.111*10^-3*Weight+4.924*10^-3*Height+8.504*10^-4*Age+0.1993]^7.341–0.05. Conclusion: This large population-based retrospective study demonstrated the normal range of LAA%, Perc n, and total lung volume measured on CT scans among subjects with normal lung function and CT findings. Reference equations are provided.
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Affiliation(s)
- Ting Cheng
- Department of Respiratory Medicine, Ruijin Hospital North, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China.,Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | - Yong Li
- Department of Respiratory Medicine, Ruijin Hospital North, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China.,Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | - Shuai Pang
- Department of Respiratory Medicine, Ruijin Hospital North, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China.,Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | - HuanYing Wan
- Department of Respiratory Medicine, Ruijin Hospital North, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China.,Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | - GuoChao Shi
- Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China.,Department of Respiratory Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | - QiJian Cheng
- Department of Respiratory Medicine, Ruijin Hospital North, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China.,Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | - QingYun Li
- Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China.,Department of Respiratory Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | - ZiLai Pan
- Department of Radiology, Ruijin Hospital North, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | - ShaoGuang Huang
- Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China.,Department of Respiratory Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
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20
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Farrell CJL, Nguyen L, Carter AC. Parathyroid hormone: Data mining for age-related reference intervals in adults. Clin Endocrinol (Oxf) 2018; 88:311-317. [PMID: 28949026 DOI: 10.1111/cen.13486] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 09/21/2017] [Accepted: 09/21/2017] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Age-related changes in parathyroid hormone (PTH) have been previously documented in adults. However, because of the limitations of traditional approaches to establishing reference intervals, age-related reference intervals have not been defined. We sought to use a data mining approach to derive age-related PTH reference intervals. DESIGN AND PARTICIPANTS Results from patients undergoing PTH testing over a 4-year period were extracted from the database of a private pathology laboratory in New South Wales, Australia. Patients were included in the study if they were 18 years or older and had simultaneous determination of PTH, serum calcium, estimated glomerular filtration rate and 25-hydroxyvitamin D (25-OHD). Patients with abnormalities of serum calcium or renal function were excluded. MEASUREMENTS Bhattacharya analysis of log-transformed data was used to derive age-related PTH reference intervals across adulthood. RESULTS Results were available for 33 652 subjects. Among patients with optimal 25-OHD status, older age was associated with higher PTH concentrations. Age-related reference intervals were derived and showed a 63% increase in the upper and lower reference limits between the youngest (18-29 years of age) and the oldest (80 years of age or older) age partitions. The appropriateness of using a single reference interval for patients of all ages was evaluated against objective criteria and was found to be unsatisfactory. CONCLUSIONS Data mining was demonstrated to be a useful tool for establishing age-related PTH reference intervals. The technique demonstrated that increasing age is associated with higher PTH concentrations and that age-related reference intervals are important for accurate result interpretation.
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Affiliation(s)
| | - Lan Nguyen
- Department of Clinical Chemistry, Laverty Pathology, North Ryde, NSW, Australia
| | - Andrew C Carter
- Department of Clinical Chemistry, Laverty Pathology, North Ryde, NSW, Australia
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21
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Belteki G, Lin B, Morley CJ. Weight-correction of carbon dioxide diffusion coefficient (DCO 2 ) reduces its inter-individual variability and improves its correlation with blood carbon dioxide levels in neonates receiving high-frequency oscillatory ventilation. Pediatr Pulmonol 2017; 52:1316-1322. [PMID: 28682001 DOI: 10.1002/ppul.23759] [Citation(s) in RCA: 11] [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: 10/12/2016] [Accepted: 06/13/2017] [Indexed: 12/29/2022]
Abstract
BACKGROUND Carbon-dioxide elimination during high-frequency oscillatory ventilation (HFOV) is thought to be proportional to the carbon dioxide diffusion coefficient (DCO2 ) which is calculated as frequency x (tidal volume)2 . DCO2 can be used to as an indicator of CO2 elimination but values obtained in different patients cannot be directly compared. OBJECTIVES To analyze the relationship between DCO2 , the weight-corrected DCO2 (DCO2 corr) and blood gas PCO2 values obtained from infants receiving HFOV. METHODS DCO2 data were obtained from 14 infants at 1/s sampling rate and the mean DCO2 was determined over 10 min periods preceding the time of the blood gas. DCO2 corr was calculated by dividing the DCO2 by the square of the body weight in kg. RESULTS Weight-correction significantly reduced the inter-individual variability of DCO2 . When data from all the babies were combined, standard DCO2 showed no correlation with PCO2 but DCO2 corr showed a weak but statistically significant inverse correlation. The correlation was better when the endotracheal leak was <10%. There was significant inverse but weaker correlation between the HFOV tidal volume (VThf) and the PCO2 . In any baby, DCO2 corr >50 mL2 /sec/kg2 or VThf > 2.5 mL/kg was rarely needed to avoid hypercapnia. CONCLUSIONS Weight-correction of DCO2 values improved its comparability between patients. Weight-corrected DCO2 correlated better with PCO2 than uncorrected DCO2 but the correlation was weak.
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Affiliation(s)
- Gusztav Belteki
- Department of Neonatology, The Rosie Hospital, Cambridge University Hospitals NHS Trust, Cambridge, United Kingdom
| | - Benjamin Lin
- Department of Neonatology, The Rosie Hospital, Cambridge University Hospitals NHS Trust, Cambridge, United Kingdom
| | - Colin J Morley
- Department of Neonatology, The Rosie Hospital, Cambridge University Hospitals NHS Trust, Cambridge, United Kingdom
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Vo HQ, Marwick TH, Negishi K. MRI-Derived Myocardial Strain Measures in Normal Subjects. JACC Cardiovasc Imaging 2017; 11:196-205. [PMID: 28528164 DOI: 10.1016/j.jcmg.2016.12.025] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [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: 09/29/2016] [Revised: 12/06/2016] [Accepted: 12/09/2016] [Indexed: 01/27/2023]
Abstract
OBJECTIVES The aim of this study was to perform a systematic review and meta-analysis to estimate the normal ranges of magnetic resonance imaging (MRI)-based feature tracking (FT) and to identify sources of variations. Similar analyses were also performed for strain encoding, displacement encoding with stimulated echoes, and myocardial tagging. BACKGROUND MRI-FT is a novel technique for quantification of myocardial deformation using MRI cine images. However, the reported 95% confidence intervals (CIs) from the 2 largest studies have no overlaps. METHODS Four databases (EMBASE, SCOPUS, PUBMED, and Web of Science) were systematically searched for MRI strains of the left (LV) and right (RV) ventricles. The key terms for MRI-FT were "tissue tracking," "feature tracking," "cardiac magnetic resonance," "cardiac MRI," "CMR," and "strain." A random effects model was used to pool LV global longitudinal strain (GLS), global circumferential strain (GCS), global radial strain (GRS), and RVGLS. Meta-regressions were used to identify the sources of variations. RESULTS 659 healthy subjects were included from 18 papers for MRI-FT. Pooled mean of LVGLS was -20.1% (95% CI: -20.9% to -19.3%), LVGCS -23% (95% CI: -24.3% to -21.7%), LVGRS 34.1% (95% CI: 28.5% to 39.7%), and RVGLS -21.8% (95% CI: -23.3% to -20.2%). Although there were no publication biases except for LVGCS, significant heterogeneities were found. Meta-regression showed that variation of LVGCS was associated with field strength (β = 3.2; p = 0.041). Variations of LVGLS, LVGRS, and RVGLS were not associated with any of age, sex, software, field strength, sequence, LV ejection fraction, or LV size. LVGCS seems the most robust in MRI-FT. Among the MRI-derived strain techniques, the normal ranges were mostly concordant in LVGLS and LVGCS but varied substantially in LVGRS and RVGLS. CONCLUSIONS The pooled means of 4 MRI-derived myocardial strain methods in normal subjects are demonstrated. Differences in field strength were attributed to variations of LVGCS.
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Affiliation(s)
- Ha Q Vo
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia
| | - Thomas H Marwick
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia; Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Kazuaki Negishi
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia.
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Wang Z, Zhang H, Zhang X, Sun J, Han C, Li C, Li Y, Teng X, Fan C, Liu A, Shan Z, Liu C, Weng J, Teng W. Serum thyroglobulin reference intervals in regions with adequate and more than adequate iodine intake. Medicine (Baltimore) 2016; 95:e5273. [PMID: 27902589 PMCID: PMC5134814 DOI: 10.1097/md.0000000000005273] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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] [Indexed: 12/17/2022] Open
Abstract
The purpose of this study was to establish normal thyroglobulin (Tg) reference intervals (RIs) in regions with adequate and more than adequate iodine intake according to the National Academy of Clinical Biochemistry (NACB) guidelines and to investigate the relationships between Tg and other factors.A total of 1317 thyroid disease-free adult subjects (578 men, 739 nonpregnant women) from 2 cities (Guangzhou and Nanjing) were enrolled in this retrospective, observational study. Each subject completed a questionnaire and underwent physical and ultrasonic examination. Serum Tg, thyroid-stimulating hormone (TSH), thyroid peroxidase antibody (TPOAb), Tg antibody (TgAb), and urinary iodine concentration (UIC) were measured. Reference groups were established on the basis of TSH levels: 0.5 to 2.0 and 0.27 to 4.2 mIU/L.The Tg RIs for Guangzhou and Nanjing were 1.6 to 30.0 and 1.9 to 25.8 ng/mL, respectively. No significant differences in Tg were found between genders or among different reference groups. Stepwise linear regression analyses showed that TgAb, thyroid volume, goiter, gender, age, and TSH levels were correlated with Tg.In adults from regions with adequate and more than adequate iodine intake, we found that Tg may be a suitable marker of iodine status; gender-specific Tg RI was unnecessary; there was no difference between Tg RIs in regions with adequate and more than adequate iodine intake; and the TSH criterion for selecting the Tg reference population could follow the local TSH reference rather than 0.5 to 2.0 mIU/L.
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Affiliation(s)
- Zhaojun Wang
- The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Liaoning
| | - Hanyi Zhang
- The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Liaoning
| | - Xiaowen Zhang
- The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Liaoning
| | - Jie Sun
- The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Liaoning
| | - Cheng Han
- The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Liaoning
| | - Chenyan Li
- The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Liaoning
| | - Yongze Li
- The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Liaoning
| | - Xiaochun Teng
- The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Liaoning
| | - Chenling Fan
- The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Liaoning
| | - Aihua Liu
- The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Liaoning
| | - Zhongyan Shan
- The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Liaoning
| | - Chao Liu
- Department of Endocrinology and Metabolism, Jiangsu Province Hospital on Integration of Chinese and Western Medicine, Nanjing University of Traditional Chinese Medicine, Jiangsu
| | - Jianping Weng
- Guangdong Provincial Key Laboratory of Diabetology, Department of Endocrinology and Metabolic Disease, The Third Affiliated Hospital of Sun Yat-Sen University, Guangdong, China
| | - Weiping Teng
- The Endocrine Institute and The Liaoning Provincial Key Laboratory of Endocrine Diseases, Department of Endocrinology and Metabolism, The First Hospital of China Medical University, Liaoning
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Poon LCY, Tan MY, Yerlikaya G, Syngelaki A, Nicolaides KH. Birth weight in live births and stillbirths. Ultrasound Obstet Gynecol 2016; 48:602-606. [PMID: 27854393 DOI: 10.1002/uog.17287] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 08/18/2016] [Accepted: 08/31/2016] [Indexed: 06/06/2023]
Abstract
OBJECTIVE To establish a normal range of birth weights for gestational age at delivery and to compare the proportion of live births and stillbirths that are classified as small-for-gestational age (SGA) according to our normal range vs that of the INTERGROWTH-21st standard. METHODS The study population comprised 113 019 live births and 437 (0.4%) stillbirths. The inclusion criterion for establishing a normal range of birth weights for gestational age was the live birth of a phenotypically normal neonate ≥ 24 weeks' gestation and the exclusion criteria were smoking and prepregnancy hypertension, diabetes mellitus, systemic lupus erythematosus or antiphospholipid syndrome, pre-eclampsia, gestational hypertension, gestational diabetes mellitus or iatrogenic preterm birth for fetal growth restriction in the current pregnancy. Inclusion criteria were met by 92 018 live births. The proportions of live births and stillbirths with birth weights < 5th and < 10th percentiles of our normal range and those according to the INTERGROWTH-21st standard were determined and compared by the chi-square test and McNemar test. RESULTS The proportions of live births and stillbirths with a birth weight < 5th percentile according to our standard were significantly higher than and discordant with the proportion according to the INTERGROWTH-21st standard (live birth: 5.6% vs 3.4%; stillbirth: 37.2% vs 22.7%). Similarly, the proportion of live births and stillbirths with a birth weight < 10th percentile according to our standard were significantly higher than and discordant with those according to the INTERGROWTH-21st standard (live birth: 11.2% vs 6.9%; stillbirth: 44.3% vs 32.6%). CONCLUSION The INTERGROWTH-21st standard underestimates the proportion of SGA live births and stillbirths in our population. Copyright © 2016 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- L C Y Poon
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, UK
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - M Y Tan
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, UK
| | - G Yerlikaya
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, UK
| | - A Syngelaki
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, UK
| | - K H Nicolaides
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, UK
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Abstract
Although biological science discovery often involves comparing conditions to a normal state, in proteomics little is actually known about normal. Two Human Proteome studies featured in Nature offer new insights into protein expression and an opportunity to assess how high-throughput proteomics measures normal protein ranges. We use data from these studies to estimate technical and biological variability in protein expression and compare them to other expression data sets from normal tissue. Results show that measured protein expression across same-tissue replicates vary by ±4- to 10-fold for most proteins. Coefficients of variation (CV) for protein expression measurements range from 62% to 117% across different tissue experiments; however, adjusting for technical variation reduced this variability by as much as 50%. In addition, the CV could also be reduced by limiting comparisons to proteins with at least 3 or more unique peptide identifications as the CV was on average 33% lower than for proteins with 2 or fewer peptide identifications. We also selected 13 housekeeping proteins and genes that were expressed across all tissues with low variability to determine their utility as a reference set for normalization and comparative purposes. These results present the first step toward estimating normal protein ranges by determining the variability in expression measurements through combining publicly available data. They support an approach that combines standard protocols with replicates of normal tissues to estimate normal protein ranges for large numbers of proteins and tissues. This would be a tremendous resource for normal cellular physiology and comparisons of proteomics studies.
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Affiliation(s)
- Roger Higdon
- †Bioinformatics and High-Throughput Analysis Laboratory, Seattle Children's Research Institute, Seattle, Washington 98101, United States.,‡CDO Analytics, Seattle Children's Hospital, Seattle, Washington 98101, United States
| | - Eugene Kolker
- †Bioinformatics and High-Throughput Analysis Laboratory, Seattle Children's Research Institute, Seattle, Washington 98101, United States.,‡CDO Analytics, Seattle Children's Hospital, Seattle, Washington 98101, United States.,§Departments of Biomedical Informatics and Medical Education and Pediatrics, University of Washington, Seattle, Washington 98195, United States.,∥Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States
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26
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Tanaka K, Hyogo H, Ono M, Takahashi H, Kitajima Y, Ono N, Eguchi T, Fujimoto K, Chayama K, Saibara T, Anzai K, Eguchi Y. Upper limit of normal serum alanine aminotransferase levels in Japanese subjects. Hepatol Res 2014; 44:1196-207. [PMID: 24372862 DOI: 10.1111/hepr.12293] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [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: 08/12/2013] [Revised: 11/14/2013] [Accepted: 12/16/2013] [Indexed: 01/11/2023]
Abstract
AIM Serum alanine aminotransferase (ALT) is important for screening, diagnosis and management of chronic liver diseases. The incidence of non-alcoholic fatty liver disease (NAFLD)/non-alcoholic steatohepatitis (NASH), which is considered a hepatic manifestation of lifestyle-related diseases, is increasing worldwide. However, the upper limit of the normal ALT level has not yet been established because of not excluding many lifestyle-related diseases. The aim of this study was to evaluate the upper limit of normal serum ALT levels in Japanese subjects. METHODS We analyzed the serum ALT levels of 11 404 Japanese subjects negative for hepatitis B surface antigen and hepatitis C virus antibody, and who received health check-ups. Lifestyle factors related to ALT levels were determined by multivariate analysis. Subjects with all factors identified by multivariate analysis within the normal range were defined as "healthy" subjects. The 90th percentile of ALT levels in healthy subjects was defined as the upper limit of normal ALT. RESULTS Whereas alcohol intake was not a significant factor, the following were independently associated with ALT concentration by multivariate analysis: sex; age; body mass index; waist circumference; concentrations of total cholesterol, high-density lipoprotein cholesterol, triglycerides and fasting blood glucose; and fatty liver on ultrasonography. Healthy subjects consisted of 1462 (21.2%) men and 2046 (45.4%) women, and the 90th percentiles of the ALT levels in the two groups were 29 and 23 IU/L, respectively. CONCLUSION The upper limits of normal ALT when considering lifestyle factors in Japanese subjects were 29 IU/L in men and 23 IU/L in women.
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Affiliation(s)
- Kenichi Tanaka
- Clinical Gastroenterology, Eguchi Hospital, Saga, Japan; Department of Internal Medicine, Saga Medical School, Saga, Japan
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27
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Elbatarny M, Mollah S, Grabell J, Bae S, Deforest M, Tuttle A, Hopman W, Clark DS, Mauer AC, Bowman M, Riddel J, Christopherson PA, Montgomery RR, Rand ML, Coller B, James PD. Normal range of bleeding scores for the ISTH-BAT: adult and pediatric data from the merging project. Haemophilia 2014; 20:831-5. [PMID: 25196510 DOI: 10.1111/hae.12503] [Citation(s) in RCA: 191] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/18/2014] [Indexed: 10/24/2022]
Abstract
Bleeding Assessment Tools (BATs) have been developed to aid in the standardized evaluation of bleeding symptoms. The Vicenza Bleeding Questionnaire (BQ), published in 2005, established a common framework and scoring key that has undergone subsequent modification over the years, culminating in the publication of the ISTH-BAT in 2010. Understanding the normal range of bleeding scores is critical when assessing the utility of a BAT. Within the context of The Merging Project, a bioinformatics system was created to facilitate the merging of legacy data derived from four different (but all Vicenza-based) BATs; the MCMDM1-VWD BQ, the Condensed MCMDM-1VWD BQ, the Pediatric Bleeding Questionnaire and the ISTH-BAT. Data from 1040 normal adults and 328 children were included in the final analysis, which showed that the normal range is 0-3 for adult males, 0-5 for adult females and 0-2 in children for both males and females. Therefore, the cut-off for a positive or abnormal BS is ≥4 in adult males, ≥6 in adult females and ≥3 in children. This information can now be used to objectively assess bleeding symptoms as normal or abnormal in future studies.
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Affiliation(s)
- M Elbatarny
- Department of Medicine, Queen's University, Kingston, Canada
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Hadj-Rabia S, Jacob S, Dufresne H, Mashiah J, Vaivre-Douret L, Bodemer C. Cognitive profile of school-age children and teenagers with hypohidrotic ectodermal dysplasia (HED). Am J Med Genet A 2014; 164A:2461-4. [PMID: 25159892 DOI: 10.1002/ajmg.a.36519] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 10/08/2013] [Accepted: 01/30/2014] [Indexed: 11/10/2022]
Abstract
Anhidrotic/hypohidrotic ectodermal dysplasia (HED) is the most common of the ectodermal dysplasias characterized by a triad of absent or reduced sweat, hypodontia and misshapen teeth, and missing or sparse hair. As the central nervous system is primarily ectodermal in origin, it has long been a concern that HED may be associated with developmental delay and/or intellectual disabilities. While published reviews report abnormalities in mental or motor development in 15-25% of HED-affected patients, there is no report in the literature including a systematic assessment of intellectual abilities in a cohort of patients with this rare disorder. During yearly health care updates, many of our clinic families report attention difficulties in young HED patients without evidence of a significant impact on school performance. In an exploratory study to identify and quantify intellectual abnormalities that may be associated with HED, we performed a psychological examination of 23 HED patients by means of the Wechsler Intelligence Scales, WPPSI-III, and WISC-IV. The interpretation of the tests shows no significant impairment in the achievements of the sample group compared with normative values (full scale scores, and index scale scores of the WISC-IV). At an individual level, the HED-affected patients were characterised by higher scores on the Verbal Comprehension Index, on Perceptual Reasoning and Working Memory Indices, and lower scores on the Processing Speed Index. As all of the Indices were within normal limits for the study population, in the absence of major mental/motor disabilities these findings support the mainstream education of HED-affected children.
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Affiliation(s)
- Smail Hadj-Rabia
- Department of Dermatology, Reference Center for Genodermatoses and Rare Skin Diseases (MAGEC), Institut Imagine, Hôpital Universitaire Necker-Enfants Malades, AP-HP, Paris, France; INSERM U781, Institut Imagine, Paris, France; Université Paris Descartes-Sorbonne Paris Cité, Paris, France
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29
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Krishnan VV, Ravindran R, Wun T, Luciw PA, Khan IH, Janatpour K. Multiplexed measurements of immunomodulator levels in peripheral blood of healthy subjects: Effects of analytical variables based on anticoagulants, age, and gender. Cytometry B Clin Cytom 2014; 86:426-35. [PMID: 24574151 DOI: 10.1002/cyto.b.21147] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 11/04/2013] [Accepted: 12/02/2013] [Indexed: 02/06/2023]
Abstract
Multiplex microbead immunoassay (MMIA) is a powerful technology for a wide range of biomedical and clinical applications. It is important to study the normal concentration ranges of immunomodulators under different sample preparation conditions and age groups of subjects in order to more precisely determine their reference values for use in assessing alterations of their levels in disease. The aim of this study was to determine the plasma concentrations of immunomodulators (cytokines, chemokines, and growth factors) in the peripheral blood from healthy subjects by the use of a large multiplex panel, and to determine the effects of different anticoagulants, age, and gender on the immunomodulator levels. In addition, the assay precision for these biomarker analytes was determined. Plasma samples from 107 healthy subjects, aged 18 to 85 years, were collected in three different anticoagulants (sodium citrate, EDTA, Heparin); corresponding serum samples were also obtained. Multiplex microbead immunoassays were performed for measuring a total of 23 analytes including chemokines, cytokines, and growth factors (IL-1β, IL-1ra, IL-2, IL-6, IL-7, IL-8, IL-12 p70, IL-17, IFN-γ, IP-10, MCP-1, PDGF-BB, RANTES, TNF-α, IL-1a, IL-16, HGF, MIG, TNF-β, PDGF-ABBB, EGF, Flt-3 Ligand, VEGF). For these analytes, our results showed that the anticoagulant affected the concentration measurements and the coefficients of variation. However, the relative levels of the analytes (profiles) of samples collected in a particular anticoagulant are consistent. The analytes IL-1β, IL-7, Flt-3 Ligand, and IL-12p70 show the largest variation (up to fourfold) between the age groups. In addition, no statistically significant differences in the level of the analytes were found between the sexes.
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Affiliation(s)
- V V Krishnan
- Department of Chemistry, California State University, Fresno, California, 93740; Center for Comparative Medicine, University of California Davis, Davis, California, 95616; Department of Pathology and Laboratory Medicine, University of California School of Medicine, Davis, California, 95616
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Davis AE, Lewandowski AJ, Holloway CJ, Ntusi NAB, Banerjee R, Nethononda R, Pitcher A, Francis JM, Myerson SG, Leeson P, Donovan T, Neubauer S, Rider OJ. Observational study of regional aortic size referenced to body size: production of a cardiovascular magnetic resonance nomogram. J Cardiovasc Magn Reson 2014; 16:9. [PMID: 24447690 PMCID: PMC3899403 DOI: 10.1186/1532-429x-16-9] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [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: 07/19/2013] [Accepted: 01/14/2014] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Cardiovascular magnetic resonance (CMR) is regarded as the gold standard for clinical assessment of the aorta, but normal dimensions are usually referenced to echocardiographic and computed tomography data and no large CMR normal reference range exists. As a result we aimed to 1) produce a normal CMR reference range of aortic diameters and 2) investigate the relationship between regional aortic size and body surface area (BSA) in a large group of healthy subjects with no vascular risk factors. METHODS 447 subjects (208 male, aged 19-70 years) without identifiable cardiac risk factors (BMI range 15.7-52.6 kg/m2) underwent CMR at 1.5 T to determine aortic diameter at three levels: the ascending aorta (Ao) and proximal descending aorta (PDA) at the level of the pulmonary artery, and the abdominal aorta (DDA), at a level 12 cm distal to the PDA. In addition, 201 of these subjects had aortic root imaging, allowing for measurements at the level of the aortic valve annulus (AV), aortic sinuses and sinotubular junction (STJ). RESULTS Normal diameters (mean ±2 SD) were; AV annulus male(♂) 24.4 ± 5.4, female (♀) 21.0 ± 3.6 mm, aortic sinus♂ 32.4 ± 7.7, ♀27.6 ± 5.8 mm, ST-junction ♂25.0 ± 7.4, ♀21.8 ± 5.4 mm, Ao ♂26.7 ± 7.7, ♀25.5 ± 7.4 mm, PDA ♂20.6 ± 5.6, +18.9 ± 4.0 mm, DDA ♂17.6 ± 5.1, ♀16.4 ± 4.0 mm. Aortic root and thoracic aortic diameters increased at all levels measured with BSA. No gender difference was seen in the degree of dilatation with increasing BSA (p>0.5 for all analyses). CONCLUSION Across both genders, increasing body size is characterized by a modest degree of aortic dilatation, even in the absence of traditional cardiovascular risk factors.
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Affiliation(s)
- Anne E Davis
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Adam J Lewandowski
- Oxford Clinical Cardiovascular Research Facility, University of Oxford, Oxford, UK
| | - Cameron J Holloway
- St. Vincent’s Hospital and the Victor Chang Cardiac Research Institute, Sydney, Australia
| | - Ntobeko AB Ntusi
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Rajarshi Banerjee
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Richard Nethononda
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Alex Pitcher
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Jane M Francis
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Saul G Myerson
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Paul Leeson
- Oxford Clinical Cardiovascular Research Facility, University of Oxford, Oxford, UK
| | - Tim Donovan
- University of Cumbria Health and Medical Sciences, Lancaster, UK
| | - Stefan Neubauer
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Oliver J Rider
- Radcliffe Department of Medicine, Division of Cardiovascular Medicine, John Radcliffe Hospital, Oxford OX3 9DU, UK
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McCarron DA, Kazaks AG, Geerling JC, Stern JS, Graudal NA. Normal range of human dietary sodium intake: a perspective based on 24-hour urinary sodium excretion worldwide. Am J Hypertens 2013; 26:1218-23. [PMID: 23978452 DOI: 10.1093/ajh/hpt139] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The recommendation to restrict dietary sodium for management of hypertensive cardiovascular disease assumes that sodium intake exceeds physiologic need, that it can be significantly reduced, and that the reduction can be maintained over time. In contrast, neuroscientists have identified neural circuits in vertebrate animals that regulate sodium appetite within a narrow physiologic range. This study further validates our previous report that sodium intake, consistent with the neuroscience, tracks within a narrow range, consistent over time and across cultures. METHODS Peer-reviewed publications reporting 24-hour urinary sodium excretion (UNaV) in a defined population that were not included in our 2009 publication were identified from the medical literature. These datasets were combined with those in our previous report of worldwide dietary sodium consumption. RESULTS The new data included 129 surveys, representing 50,060 participants. The mean value and range of 24-hour UNaV in each of these datasets were within 1 SD of our previous estimate. The combined mean and normal range of sodium intake of the 129 datasets were nearly identical to that we previously reported (mean = 158.3±22.5 vs. 162.4±22.4 mmol/d). Merging the previous and new datasets (n = 190) yielded sodium consumption of 159.4±22.3 mmol/d (range = 114-210 mmol/d; 2,622-4,830mg/d). CONCLUSIONS Human sodium intake, as defined by 24-hour UNaV, is characterized by a narrow range that is remarkably reproducible over at least 5 decades and across 45 countries. As documented here, this range is determined by physiologic needs rather than environmental factors. Future guidelines should be based on this biologically determined range.
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Affiliation(s)
- David A McCarron
- Department of Nutrition, University of California-Davis, Davis, CA, USA
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Itoh Y, Maehara S, Itoh N, Yamashita K, Izumisawa Y. Electroretinography recordings using a light emitting diode active corneal electrode in healthy beagle dogs. J Vet Sci 2013; 14:77-84. [PMID: 23388429 PMCID: PMC3615236 DOI: 10.4142/jvs.2013.14.1.77] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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] [Received: 12/17/2010] [Revised: 03/27/2012] [Accepted: 04/04/2012] [Indexed: 11/20/2022] Open
Abstract
Electroretinography (ERG) is a well-established diagnostic procedure for objectively evaluating retinal function. In this study, ERG in beagle dogs, which are a popular experimental animal, was performed to determine the normal range of ERG variables and assess differences between the left and right eyes. ERG findings including rod, combined rod-cone, single-flash cone, and 30-Hz flicker responses were recorded with an LED-electrode in 43 sedated beagle dogs. The subjects were divided into young (< 1 year old), adult (1 ˜ 5 years old), and senile animals (≥ 6 years old). Normal ERG ranges were obtained. Significant differences in b-wave amplitude along with b/a ratio of the combined rod-cone response were found between the young and adult animals as well as young and senile dogs. No significant differences were observed between the left and right eyes. ERG variables in beagle dogs differed by age due to age-related retinal changes. Thus, we propose that normal ERG ranges should be determined according to age in each clinic and laboratory using its own equipment because each institution usually has different systems or protocols for ERG testing.
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Affiliation(s)
- Yoshiki Itoh
- Department of Small Animal Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido 069-8501, Japan
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Ely JJ, Zavaskis T, Lammey ML. Hypertension increases with aging and obesity in chimpanzees (Pan troglodytes). Zoo Biol 2013; 32:79-87. [PMID: 22968757 PMCID: PMC3537917 DOI: 10.1002/zoo.21044] [Citation(s) in RCA: 29] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 08/10/2012] [Accepted: 08/10/2012] [Indexed: 12/17/2022]
Abstract
Cardiovascular disease is a primary cause of morbidity and mortality in captive chimpanzees. Four years of blood pressure (BP) data were analyzed from a captive former laboratory population of 201 healthy adult chimpanzees with assessment of age and obesity on elevated BP. Five different measures of obesity were compared: abdominal girth, basal metabolic rate, body-mass index (BMI), body weight, and surface area. Systolic BP varied by sex. Obesity did not influence male BP. For females, obesity was a significant determinant of BP. The best measure of female obesity was basal metabolic rate and the worst was BMI. Median systolic BP of healthy weight females (<54.5 kg) was significantly lower (128 mmHg) than overweight or obese females (140 mmHg), but both were lower than all males (147 mmHg). For diastolic BP, neither sex nor any of the five obesity measures was significant. But age was highly significant, with geriatric chimpanzees (>30 years) having higher median diastolic BP (74 mmHg) than young adults of 10-29 years of age (65 mmHg). By these criteria, 80% of this population is normotensive, 7% prehypertensive, and 13% hypertensive. In summary, systolic BP intervals required adjustment for obesity among females but not males. Diastolic BP required adjustment for advanced age (≥30 years). Use of these reference intervals can facilitate timely clinical care of captive chimpanzees.
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Affiliation(s)
- John J Ely
- Alamogordo Primate Facility, Holloman AFB, Alamogordo, New Mexico, USA.
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Webber CE, Barr RD. Age- and gender-dependent values of skeletal muscle mass in healthy children and adolescents. J Cachexia Sarcopenia Muscle 2012; 3:25-9. [PMID: 22451073 DOI: 10.1007/s13539-011-0042-6] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Accepted: 10/04/2011] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Skeletal muscle mass (SMM) can be extracted from whole-body scans obtained by X-ray-based dual-photon absorptiometry (DXA). There is a need to establish expected age-dependent values for children and adolescents. METHODS Appendicular lean tissue mass (ALM) was extracted from whole-body DXA scans in 140 healthy children and adolescents (68 females and 72 males). Whole-body SMM was calculated from ALM using equations developed by Kim et al. (Am J Clin Nutr 84:1014-1020, 2006). Age-dependent patterns of increase in SMM were derived by fitting SMM values to equations that consisted of the sum of two logistic expressions, one accounting for SMM changes during growth and the other for SMM changes during puberty. Normal ranges were defined so that 95% of the SMM values were included. The reproducibility of SMM measurements was obtained from whole-body DXA scans repeated on three occasions in each of a separate group of 32 normal children with repositioning between scans. RESULTS Normal ranges are presented as equations describing the age-dependent pattern of increase in SMM as well as population standard deviations that increased steadily with age. For 15 children below age 10, SMM reproducibility (95% CI) was 149 g (119-199 g) while for 17 children and adolescents over age 10, reproducibility was 170 g (138-223 g). CONCLUSION DXA-based measurements of SMM in children and adolescents are reproducible and can be expressed in terms of age-dependent Z scores.
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Leung WW, Bowie CR, Harvey PD. Functional implications of neuropsychological normality and symptom remission in older outpatients diagnosed with schizophrenia: A cross-sectional study. J Int Neuropsychol Soc 2008; 14:479-88. [PMID: 18419846 DOI: 10.1017/S1355617708080600] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2007] [Revised: 02/01/2008] [Accepted: 02/01/2008] [Indexed: 01/17/2023]
Abstract
Cognitive impairments in schizophrenia are well documented and correlated with functional disability. Although some patients demonstrate normal neuropsychological (NP) functioning, little is known about their functional disability. We examined the cross-sectional functional implications of NP normality and symptomatic remission in older outpatients diagnosed with schizophrenia or schizoaffective disorder, who were administered a NP battery and performance-based measures of functional and social competence, with their real-world functioning rated by case managers. NP status was classified by the General Deficit Score (GDS) and remission status was based on the Positive and Negative Syndrome Scale (PANSS), yielding four subsamples of patients: NP normal-remitted (n = 21), NP normal-symptomatic (n = 22), NP impaired-remitted (n = 90), and NP impaired-symptomatic (n = 97). NP normal patients demonstrated better functional and social competence and better ratings of real world functioning, after controlling for premorbid abilities. However, compared to normative date, NP normal patients manifested disability in several real-world domains, including residential status. These results suggest that NP status is a better predictor of functional outcome then symptom status or the interaction of the two factors. The disability seen in NP normal cases indicates that factors other than cognitive impairments may determine aspects of everyday outcomes in schizophrenia.
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