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KMID : 1138720130390020031
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Korean Public Health Research
2013 Volume.39 No. 2 p.31 ~ p.38
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Pregnancy Outcomes of Singleton Child Birth in Women Aged 40 Years and Older
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Park Sang-Hwa
Lim Dar-Oh
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Abstract
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Objectives: The objective of this study was to analyze the trends of child birth in women aged 40 years and older(1981-2011), and investigated the risk of preterm birth(≤36 weeks : PB), late preterm birth(34-36 weeks : LPB) and low birth weight(≤2.4kg : LBW) by analyzing 2010-2011 singleton birth certificated data(912,480 births) from Statistics Korea. Methods: Odds ratio and 95% confidence intervals were calculated from multivariate logistic regression analyses to describe the association between PB, LPB & LBW and maternal aged 40 years and older. Results: The birth rate of women aged 40 years and older in total births was 2.1 percent in 2010-2011(odds ratio : 2.66), as compared with the rate of birth in women aged 40 years and older in 1981-1984(0.8 percent). The incidence of PB, LPB and LBW was 4.6 percent, 3.6 percent and 3.7 percent, respectively. ‘-shaped’ percent distribution of PB, LPB and LBW were observed in terms of maternal age at birth, with that of ≤29 years old group being the lowest. Compared to women aged ≤29 years old, women giving birth age at 40-44 years were at increased risk for PB(odds ratio : 1.95, 95% CI : 1.84-2.16), LPB(1.79, 95% CI : 1.68-1.91) and LBW(2.14, 95% CI : 2.01-2.28). Women aged 45 years and older were at increased risk of PB(2.18, 1.75-2.71), LPB(1.85, 1.42-2.41) and LBW(2.97, 2.38-3.70). Conclusion: Advanced maternal age was associated with a range of adversed pregnancy outcomes(PB, LPB and LBW).
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KEYWORD
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Pregnancy Outcomes, Advanced Maternal Age
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