Guo Li-jun, Ye Rong-wei, Wang Gui-xia, Wang Juan, Li Zhi-wen, Ren Ai-guo
Xinxiang Medical University, Xinxiang 453003, China.
Zhonghua Liu Xing Bing Xue Za Zhi. 2009 Dec;30(12):1243-7.
To understand the distribution of birth weight among premature infants and the associated social factors.
The study population consisted of 97 537 women who delivered singleton live birth of 20 to 41 gestational weeks in 4 counties/cities, Jiangsu and Zhejiang provinces, China from 1995 to 2000. Chi-square test was employed to test the difference of proportions between respective groups. One- way ANOVA was used to test the differences regarding the mean of gestational weeks at the first prenatal visit and the mean of prenatal visits between the two groups. Multivariate logistic regression was conducted to examine the factors associated with premature birth.
Women aged 35 years had higher (8.8%) premature incidence than those aged less than 24 years (5.6%), 25 - 29 years (4.6%), or 30 - 34 years (4.5%, P < 0.001). Women with height less than 149 cm had higher (6.8%) premature incidence than those with height taller than 150 cm (5.0%). Women whose BMI were at least 28 and 24 - 28 had higher (5.5%, 5.5%) premature incidences than those whose BMI were 18.5 - 24.0 (5.0%), < 18.5 (4.6%, P < 0.001). The incidence of premature birth was 6.0% among women without previous pregnancy, higher than that among those women with 4 times of pregnancies (5.7%), 2 times of pregnancies (4.3%), and 3 times of pregnancies (4.0%). Parous women with at least two deliveries had higher (9.3%) premature incidence than the primiparous women (5.2%) and whose women with only one delivery (4.5%, P < 0.001). Women who received early prenatal care had lower 4.7% premature incidence than those who did not receive the service (6.1%). The mean times of prenatal visits among women with premature births was 8.53, less than that of those with full term delivery (10.97). Women with less than four times of prenatal visit had higher (18.9%) premature incidence than those with at least five prenatal visits (4.9%). Multivariate logistic regression showed that premature delivery risk was associated with age, height, BMI, gravidity, parity, early prenatal care, the mean of gestational weeks at first prenatal visit and the mean number of prenatal visits etc.
Premature delivery risk was associated with factors as age, height, BMI, gravidity, parity, early prenatal care, the mean of gestational weeks at first prenatal visit, the mean number of prenatal visits etc.
了解早产儿出生体重分布及其相关社会因素。
研究对象为1995年至2000年在中国江苏省和浙江省4个县/市分娩单胎活产、孕周为20至41周的97537名妇女。采用卡方检验来检验各分组之间比例的差异。采用单因素方差分析来检验两组之间首次产前检查孕周均值和产前检查次数均值的差异。进行多因素逻辑回归分析以研究与早产相关的因素。
35岁及以上的妇女早产发生率（8.8%）高于24岁以下（5.6%）、25 - 29岁（4.6%）或30 - 34岁（4.5%）的妇女（P < 0.001）。身高低于149厘米的妇女早产发生率（6.8%）高于身高高于150厘米的妇女（5.0%）。体重指数（BMI）至少为28以及BMI在24 - 28之间的妇女早产发生率（均为5.5%）高于BMI为18.5 - 24.0的妇女（5.0%）、BMI<18.5的妇女（4.6%，P < 0.001）。既往无妊娠史的妇女早产发生率为6.0%，高于有4次妊娠史（5.7%）、2次妊娠史（4.3%）和3次妊娠史（4.0%）的妇女。有至少两次分娩经历的经产妇早产发生率（9.3%）高于初产妇（5.2%）和只有一次分娩经历的妇女（4.5%，P < 0.001）。接受早期产前检查的妇女早产发生率（4.7%）低于未接受该项服务的妇女（6.1%）。早产妇女的产前检查平均次数为8.53次，低于足月分娩妇女（10.97次）。产前检查次数少于4次的妇女早产发生率（18.9%）高于产前检查次数至少为5次的妇女（4.9%）。多因素逻辑回归分析显示，早产风险与年龄、身高、BMI、妊娠次数、产次（胎次）、早期产前检查、首次产前检查孕周均值和产前检查平均次数等因素有关。
早产风险与年龄、身高、BMI、妊娠次数、产次（胎次）、早期产前检查、首次产前检查孕周均值、产前检查平均次数等因素有关。
