Contribution of Maternal Age Distribution to Incidence of Preterm Birth; 1997~99 and 2012~14 Singleton Birth Certificated Data of Korea
Journal of the Korean Society of Maternal and Child Health
; : 221-227, 2016.
Article
ي Ko
| WPRIM
| ID: wpr-209440
المكتبة المسؤولة:
WPRO
ABSTRACT
PURPOSE:
The objective of the study was to compare contribution of maternal age to preterm birth (PTB) rates between 1997~99 and 2012~14.METHODS:
We used 1997~99 (1,872,720 births) and 2012~14 (1,280,348 births) singleton birth certificated data of Korea Statistics excluding multiple birth and extra-marital birth cases. We decomposed the contributions of age-specific PTB rates and maternal age distribution (Kitagawa's decomposition method) to overall PTB rates during the period. Odds ratio (OR) and 95% confidence intervals were calculated from logistic regression to describe the secular trend of PTB rate by birth year and maternal age.RESULTS:
The incidence of PTB increased 1.5 times, from 3.0 percent to 4.6 percent, during 1997~2014. After adjustment by logistic regression for infantile sex, parity and maternal age, the odds ratio of PTB in birth year of 2012~14 was 1.38 (95% confidence interval 1.36~1.39), compared with incidence of PTB in 1997~99. During the period, PTB rates increased 1.79 times in women aged 20~24 years and 25~29 years (OR 1.56), whereas rates remained stable in women aged 35 years and older (OR range from 1.08 to 1.13). 87.5% of the overall increase in the PTB rates was attributable to the increase in the proportion of women aged 30~34 years, but these age group accounted for only a small portion of the increase in PTB rates (OR 1.27).CONCLUSION:
The remainder of the total increment in the PTB rates during the period was explained by increase the proportion of women aged 30~34 years. There was a need to close attention in this area to understand the contributing factors to the secular trend of PTB rates.Key words
النص الكامل:
1
الفهرس:
WPRIM
الموضوع الرئيسي:
Parity
/
Logistic Models
/
Odds Ratio
/
Incidence
/
Maternal Age
/
Parturition
/
Premature Birth
/
Korea
/
Multiple Birth Offspring
نوع الدراسة:
Etiology_studies
/
Incidence_studies
/
Prognostic_studies
/
Risk_factors_studies
المحددات:
Female
/
Humans
البلد/الأقليم حسب الموضوع:
Asia
اللغة:
Ko
مجلة:
Journal of the Korean Society of Maternal and Child Health
السنة:
2016
نوع:
Article