The Korean Journal of Health Service Management (보건의료산업학회지)

Korea Society of Health Service Management (보건의료산업학회)
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Risk Factors for Preterm Birth and Low Birth Weight in Extramarital Birth: 2008-2012 Birth Certificated Data

혼외 출생아의 조기분만과 저체중아 발생 위험도에 관한 연구: 2008-2012년 출생통계

  • Lim, Dar-Oh (Korea Health Industry Development Institute) ;
  • Park, Sang-Hwa (Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University)
  • 임달오 (한국보건산업진흥원) ;
  • 박상화 (서울대학교 의학연구원 인구의학연구소)
  • Received : 2014.05.27
  • Accepted : 2014.07.03
  • Published : 2014.09.30
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Abstract

The objective of this study was to analyze the risk of preterm birth (PTB) and low birth weight (LBW) in extramarital birth by analyzing 2008-2012 birth certificated data (2,328,719 births) from Korea Statistics. Odds ratio and 95% confidence intervals (95% CI) were calculated from logistic regression analyses to describe the associations between PTB & LBW and extramarital birth adjusted for maternal age, maternal occupation & education, infantile sex, birth order and number of child birth (singleton & multiple birth). The rate of extramarital birth was 1.8 percent and 2.1 percent in 2010-11. The incidence of LBW was 8.1 percent in extramarital birth and 5.0 percent in marital birth. The incidence of PTB in extramarital birth were 8.2 percent and 5.8 percent in marital birth. Compared with marital birth, the odds ratio (OR) for PTB were 1.48 (95% CI: 1.43-1.54) for extramarital birth. Risk of LBW was higher in extramarital birth (OR: 1.70, 95% CI: 1.64-1.76) than that of marital birth. Among mothers younger than 20 years, the odds ratio of PTB among extramarital birth, relative to married birth was 1.69 (1.49-1.91). Among unmarried mothers, those at a higher risk of LBW was aged 20-29 years (1.69: 1.59-1.79). Maternal unmarried status was associated with increased risk of PTB and LBW.

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