Methods Data were collected by a under 5 child death monitoring county system during 1997 to 2000 . Results Mortality rate of the others age group of 1 - 4 in girls were higher than that in boys , death sex ratios were less than 1 , except kte neonate and 1-4 age groups .

方法采用一个国家级5岁以下儿童死亡监测县1997～2000年上报的资料，分析5岁以下儿童死亡的性别差异及死亡原因。结果5岁以下儿童除晚期新生儿和1～4岁儿童死亡率高于女性外，其余各年龄组死亡率男性低于女性。