Back to Search
Start Over
Effects of maternal serum 25-hydroxyvitamin D concentrations in the first trimester on subsequent pregnancy outcomes in an Australian population.
- Source :
- American Journal of Clinical Nutrition; Feb2014, Vol. 99 Issue 2, p287-295, 9p, 4 Charts, 1 Graph
- Publication Year :
- 2014
-
Abstract
- Background: Low serum 25-hydroxyvitamin D [25(OH)D] concentrations during pregnancy have been associated with adverse pregnancy outcomes in a few studies but not in other studies. Objectives: We assessed the serum 25(OH)D concentration at 10-14 wk of pregnancy and its association with adverse pregnancy outcomes and examined the predictive accuracy. Design: In this nested case-control study, we measured serum 25(OH)D in 5109 women with singleton pregnancies who were attending first-trimester screening in New South Wales, Australia. Multivariate logistic regression was conducted to examine the association between low 25(OH)D concentrations and adverse pregnancy outcomes (small for gestational age, preterm birth, preeclampsia, gestational diabetes, miscarriage, and stillbirth). The predictive accuracy of models was assessed. Results: The median (IQR) 25(OH)D concentration for the total population was 56.4 nmol/L (43.3-69.8 nmol/L). Serum 25(OH)D concentrations showed significant variation by parity, smoking, weight, season of sampling, country of birth, and socioeconomic status. After adjustment for maternal and clinical risk factors, low 25(OH)D concentrations were not associated with most adverse pregnancy outcomes. The area under the receiver operating characteristic curve (AUC) and likelihood ratio for a composite of severe adverse pregnancy outcomes of 25(OH)D concentrations <25 nmol/L were 0.51 and 1.44, respectively, and, for risk factors alone, were 0.64 and 2.87, respectively. The addition of 25(OH)D information to maternal and clinical risk factors did not improve the ability to predict severe adverse pregnancy outcomes (AUC: 0.64; likelihood ratio: 2.32; P = 0.39). Conclusion: Low 25(OH)D serum concentrations in the first trimester of pregnancy are not associated with adverse pregnancy outcomes and do not predict complications any better than routinely assessed clinical and maternal risk-factor information. [ABSTRACT FROM AUTHOR]
- Subjects :
- BIRTH size
BODY weight
CHI-squared test
CONFIDENCE intervals
GESTATIONAL diabetes
EPIDEMIOLOGY
FORECASTING
PREMATURE infants
EVALUATION of medical care
MISCARRIAGE
MOTHERS
MULTIVARIATE analysis
NUTRITIONAL requirements
PERINATAL death
POPULATION geography
PREECLAMPSIA
PREGNANCY
FIRST trimester of pregnancy
RESEARCH funding
SEASONS
SMOKING
STATISTICS
T-test (Statistics)
VITAMIN D
WOMEN'S health
LOGISTIC regression analysis
DATA analysis
SOCIOECONOMIC factors
PREDICTIVE validity
CASE-control method
PARITY (Obstetrics)
RECEIVER operating characteristic curves
DATA analysis software
DESCRIPTIVE statistics
Subjects
Details
- Language :
- English
- ISSN :
- 00029165
- Volume :
- 99
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- American Journal of Clinical Nutrition
- Publication Type :
- Academic Journal
- Accession number :
- 93819409
- Full Text :
- https://doi.org/10.3945/ajcn.113.065672