S-Space College of Medicine/School of Medicine (의과대학/대학원) Family Medicine (가정의학전공) Journal Papers (저널논문_가정의학전공)
The Associations between Bridal Pregnancy and Obstetric Outcomes among Live Births in Korea: Population-Based Study
- Issue Date
- Public Library of Science
- PLoS ONE, Vol.9 No.8
- Objective: In East Asia the recently increased number of marriages in response to pregnancy is an important social issue. This study evaluated the association of marriage preceded by pregnancy (bridal pregnancy) with obstetric outcomes among live births in Korea.Methods: In this population-based study, 1,152,593 first singleton births were evaluated from data registered in the national birth registration database from 2004 to 2008 in Korea. In the study population, the pregnancy outcomes among live births from the bridal pregnancy group (N = 62,590) were compared with the outcomes of the post-marital pregnancy group (N = 564,749), composed of women who gave birth after 10 months but before 24 months of marriage. The variables preterm birth (PTB; <37 weeks gestation) and low birth weight (LBW; <2.5 kg) were used to determine the primary outcome. The adjusted odds ratios (aORs) and 95% confidence intervals (CIs) were calculated after controlling for socio-demographic factors.Results: The socio-demographic factors among the bridal pregnancy group were associated with a social disadvantage and particular risk factors. In the subgroup analyses of maternal age, differences in adverse pregnancy outcomes from bridal pregnancy were identified between women in the following age group: (i) <= 19, (ii) 20-39, and (iii) >= 40 years. After the multivariate analysis, the aORs for each age group were 1.47 (95% CI: 1.15-1.89), 1.76 (1.70-1.83), and 1.13 (0.77-1.66), respectively, for PTB and 0.92 (0.70-1.21), 1.60 (1.53-1.66), and 1.11 (0.71-1.74), respectively, for LBW. In the adjusted logistic regression models, bridal pregnancy was associated with PTB (1.76, 1.69-1.82) and LBW (1.53, 1.48-1.59).Conclusion: Pregnancy outcomes among live births from bridal pregnancies are associated with higher risks for PTB and LBW in Korea.
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