甘肃省民乐县2013—2019年农村计划妊娠初产妇妊娠年龄趋势分析

Analysis on the pregnancy age trend of primiparas with planning pregnancy in rural areas in Minle county of Gansu province from 2013 to 2019

目的:分析农村计划妊娠初产妇妊娠年龄流行趋势,为降低不良孕产结局发生风险和提高生育质量提供数据支持。方法:以参加甘肃省民乐县国家免费孕前健康检查且妊娠时末次月经为2013—2019年的2606名农村汉族初产妇为研究对象,分析不同年份初产妇妊娠年龄的情况,并应用简单线性回归和广义回归模型分析妊娠年龄的年度变化趋势;同时采用边际效应模型分析2013—2015年和2017—2019年妊娠年龄与2016年的差异,使用简单线性回归模型分析差异的年度变化趋势。结果:研究对象的平均妊娠年龄从2013年的23.33岁(95%CI 23.14~23.52)上升至2019年的26.05岁(95%CI 25.68~26.42),P趋势<0.001;7年间平均妊娠年龄增加了2.72岁(95%CI 2.30~3.14),年平均增长0.26岁(95%CI 0.21~0.32)。边际效应模型结果显示,与2016年初产妇平均妊娠年龄的差异,从2013年的-0.78岁(95%CI-1.17~-0.39)上升到2019年的0.87岁(95%CI 0.43~1.32),P趋势<0.001;2013年与2019年平均妊娠年龄绝对差异达1.65岁,年平均增长0.26岁(95%CI 0.21--0.31)。结论:甘肃省民乐县农村初产妇平均妊娠年龄呈逐年增长趋势,提示妇幼健康相关工作人员应加强对高龄妊娠的认识,以降低不良孕产事件的发生风险。

Objective:To analyze the pregnancy age trend of primiparas with planning pregnancy in rural areas,and to provide data support for reducing the risk of adverse pregnancy outcomes and for improving reproductive quality.Methods:2606 rural Han Chinese women who participated in the National Free Pre-pregnancy Health Examination in Minle County of Gansu Province and got pregnant in 2013-2019 were included in this study.The distribution of pregnancy age in different years was described,and the simple linear regression and generalized regression models were used to test the annual change of pregnant age.The marginal effects model was used to analyze the pregnant age difference of primiparas between 2013-2015 or 2017-2019 and 2016,and the simple linear regression model was used to test annual change of pregnant age.Results:The pregnant age of participants has increased from 23.33(95%CI:23.14-23.52)years old in 2013 to 26.05(95%CI:25.68-26.42)years old in 2019,P trend<0.001.And the average pregnant age had increase 2.72(95%CI:2.30-3.14)years old in these 7 years,with an annual increasing of 0.26(95%CI:0.21-0.32)years old.The marginal effects also showed that comparing that in 2016,the difference of pregnant age had increased from-0.78(95%CI:-1.17-0.39)years old in 2013 to 0.87(95%CI:0.43-1.32)years old in 2019,P trend<0.001.The absolute difference of average pregnant age was 1.65 years old,with an annual increasing of 0.26(95%CI:0.21-0.31)years old.Conclusion:The pregnant age of rural primipara in Minle county is increasing year by year,it is suggests that the pregnancy of advanced age women should be strengthened by maternal and child health workers for reducing the rate of adverse pregnancy events.