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本研究用多阶段概率比例法(PPS)抽查了5324名西北地区农村妇女的一般状况、婚姻及生育史,并用COX回归分析了影响1～5岁幼儿死亡的因素。结果表明,幼儿死亡随时间推移明显下降;生育间隔越长,幼儿死亡率越低;哺乳时间长对幼儿死亡起明显抑制作用。
In this study, the general situation, marriage and birth history of 5324 rural women in the northwestern region were investigated by multistage probability proportion method (PPS). The factors that affected the death of children aged 1 ~ 5 years were analyzed by COX regression. The results showed that the death rate of young children decreased significantly with the passage of time. The longer the birth interval, the lower the mortality rate of young children. The longer duration of lactation significantly inhibited the death of young children.