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在影响哺乳的诸多因素中，社会经济及人口学因素不容忽视，本研究旨在探讨社会人口学因素对哺乳时限的影响。应用来自“中国农村已婚育龄妇女使用避孕方法变化”调查资料经生命表方法结果表明，江苏省农村产后妇女哺乳率为９７，６％，平均哺乳时限为１４．４个月，其中苏北地区为２０．７个月，苏南地区为１２．６个月。比例风险模型分析结果进一步表明，居住地区、妇女生育年龄、婴儿性别、分娩地点、妇女文化程度及其职业和丈夫的职业是主要的影响因素。经济落后地区、大生育年龄组妇女、男婴、丈夫从事农业、妇女为文盲、婴儿在家分娩的妇女哺乳时限长。在控制了其他社会人口学因素后，仍存在着地区间哺乳时限的差异，这可能与苏南、苏北文化风俗不同有关。针对影响因素采取相应措施，使之利于妇女延长完全哺乳时限。
Among the many factors influencing breastfeeding, socioeconomic and demographic factors can not be ignored. This study aimed to explore the impact of socio-demographic factors on breast-feeding time. The application of the survey data from the “Methods of Using Contraceptives to Marriageable Reproductive Women of Rural China” According to the life table method, the results showed that the postpartum women in Jiangsu Province had a lactation rate of 97.6% and an average lactation time of 14.4 months. Among them, 20.7 months for the southern region of 12.6 months. The results of the proportional hazard model analysis further indicate that the main influencing factors are residential areas, women’s reproductive age, infant’s gender, place of delivery, women’s education, and their careers and their husband’s careers. In the economically disadvantaged regions, women of childbearing age groups, male babies, husbands engaged in agriculture, women as illiterate, and infants born at home have longer periods of lactation. After controlling for other socio-demographic factors, there are still differences in the time limit for lactation between regions, which may be related to the different cultural customs of southern Jiangsu and northern Jiangsu. For the influencing factors to take appropriate measures to make it conducive to women to extend the full time of breastfeeding.