目的 了解无锡市住院分娩新生儿出生人口性别比特征及其影响因素, 为长期研究奠定基础。方法 采用描述性研究方法, 收集无锡市2008-2012年所有产科医院分娩新生儿的登记信息, 分析出生人口性别比特征。结果 无锡市2008-2012年住院分娩新生儿的平均出生人口性别比达到112.42, 流动人口出生人口性别比高于本地人口, 平均出生人口性别比随产母年龄增加而增加(108.03~123.99)(趋势检验P<0.05), 尤其是>30岁以上年龄组(>117.87)。Logistic单因素回归分析显示:流动人口、产妇年龄≥30岁、产次≥2以及剖宫产可能是影响出生人口性别比增高的因素(P<0.001)。结论 无锡市出生人口性别比偏高, 需采取措施提高监测质量, 以提高出生人口素质。

Objective To understand the sex ratio at birth and influencing factors of neonates born in hospital in Wuxi and explore the intervention measures, for laying the foundation of long-term research. Methods Using descriptive research method, the registration information of newborns were collected from all maternity hospital of Wuxi city from 2008 to 2012.The characteristic of sex ratio at birth was analyzed. Results The average sex ratio at birth was 112.42 from 2008 to 2012 in Wuxi city.The sex ratio at birth of the floating population was higher than that of native population.The average sex ratio at birth gradually increased with the age of mother (108.03~123.99) (trend test P<0.05), especially significantly increased among those more than 30 years (>117.87).Logistic regression model demonstrated that the floating population, maternal age ≥30 years old, parity ≥2 and uterine-incision delivery could be the factors of increased sex ratio(P<0.001). Conclusions The sex ratio was higher in Wuxi city.To improve the quality of the newborn population, measures should be taken to improve the monitoring quality.