A Study on Risk Factors of Preterm Delivery.
- Author:
Sang Hwa PARK
1
;
Eung Ik KIM
;
Myung Hee KIM
;
Joong Shin PARK
;
Jong Kwan JUN
;
Seok Hyun KIM
Author Information
1. Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Pregnancy;
Preterm delivery;
Risk factors;
Logistic regression analysis
- MeSH:
Abortion, Induced;
Abortion, Spontaneous;
Birth Order;
Birth Weight;
Female;
Humans;
Incidence;
Logistic Models;
Maternal Age;
Menstrual Cycle;
Multiple Birth Offspring;
Parturition;
Pregnancy;
Premature Birth;
Risk Factors*;
Seoul
- From:Korean Journal of Obstetrics and Gynecology
1997;40(9):1901-1907
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
In order to investigate the risk factors of preterm delivery, we reviewed 1,676 birth cases excluding still-birth and multiple birth delivered at Seoul National University Hospital in 1995. The logistic regression analysis was used to examine the relationship between preterm birth and risk factors. The distribution of birth weight showed 9.7 % in low birth weight(< 2.5 kg), and 4.8 % in macrosomia(>or= 4.0 kg). The rate of preterm delivery was 9.2 %(155/1,676). The incidence of preterm delivery in maternal ages under 25(15.6 %) and above 35(14.3 %) was higher than that in 25~34 years old(7.9 %). There was a significant association between preterm birth and previous history of preterm birth, spontaneous abortion and induced abortion. There was no association between preterm birth and fetal sex or birth order. The risk for preterm birth was higher in nulliparous women aged 35 or older(OR : 2.521, 95% CI : 1.387-4.584, p < 0.001). There was a significant increase in preterm birth in women with following risk factors : previous history of preterm birth(OR : 3.616, CI : 2.138 - 6.118, p < 0.0001), history of spontaneous abortion(OR : 1.861, CI : 1.296-2.671, p < 0.0001), irregular menstrual cycle (OR : 2.174, CI : 1.469 - 3.215, p < 0.0001), and previous history of pregnancy complications(OR : 5.296, CI : 3.709 - 7.561, p < 0.0001). There was no significant increase in preterm birth in women with history of induced abortion(OR : 1.250, CI : 0.830 - 1.881, p = 0.2846).
