关键词: 低出生体重儿, 影响因素, 病例对照研究

Abstract: Objective To explore the influence factors of low birth weight in Chongqing,and provide references to prevent and reduce the rate of low birth weight. Methods Case-control study method was implemented among 326 low birth weight infants and 326 normal infants from 6 maternal and child health care hospitals.A uniform questionnaire was used to investigate influencing factors,and conditional Logistic regression was used to analyze the data. Results Low birth weight was associate with mother's general information (BMI before pregnancy,education,average monthly income of family,etc.),condition during pregnancy(singleton pregnancy,antenatal care,gestational hypertension,etc.),living habit(smoking,drinking,passive smoking,etc.),and dietary(multivitamin tablets,meat,seafood,etc.).Multivariate analysis showed that average monthly income of family,singleton pregnancy,weight gain during pregnancy,and antenatal care had important protective effects on low birth weight.Meanwhile gestation complicated anemia was the main risk factor. Conclusion The occurrence of low birth weight is influenced by the various factors,so the comprehensive measures should be taken to control it.

Key words: low birth weight, influencing factor, case-control study