| Effect of women's first childbearing age on the risk of low birth weight |
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Jung Ju Lee |
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Department of Pediatrics of Chungang University, Seoul, Korea |
| 여성의 첫 출산 연령이 저체중출생아의 출생률에 미치는 영향 |
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이정주 |
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중앙대학교 의과대학 소아과학교실 |
Correspondence:
Jung Ju Lee, Email: imljj@naver.com
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| Abstract |
Purpose
: The aim of this study was to investigate the risk of low birth weight associated with delayed first childbearing in Korea.
Methods
: The national birth certificate data of the singletons and first babies in Korea from January 2001 to December 2003 (n=736,167) was used. Outcome measures were rates of low birth weight infant, very low birth weight infant between 6 maternal age group (<20 years, 20-24 years, 25-29 years, 30-34 years and >35years). Odd ratios were calculated by multiple logistic regression on marital state, maternal education, maternal occupation, paternal occupation, duration of marriage and address.
Results
: Compared with women aged 25 to 29 years, women aged 30-35 years, 35-40 years and over 40 years had higher odds ratios of low birth weight, odd ratios were 1.3, 2.1, 2.4 respectively. Even though adjusted by marital state, maternal education, maternal occupation, paternal occupation, duration of marriage and address, odds ratios were 1.3, 1.9, 2.0 respectively. Compared with women aged 25 to 29 years, women aged 30-35 years, 35-40 years and over 40 years had higher odds ratios of very low birth weight, odd ratios were 1.8, 3.3, 3.7 respectively. Even though adjusted, odd ratios were 1.6, 2.7, 2.6 respectively. Compared with the incidence of low birth weight in each maternal age, maternal education, marital state, married, high school graduated thirties women was lower incidence than unmarried, high school graduated twenties women.
Conclusion
: These findings suggest that delayed childbearing increase the risk of low birth weight and very low birth weight, but if pregnant women have better socioeconomic condition, the impact of advanced maternal age on the risk of low birth weight will be decreased. |
| Key Words:
Maternal age, Low birth weight, Very low birth weight |
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