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对１９８６年１０月至１９８７年９月期间四川省１１１６７６例围产儿中的低体重儿及其发生因素进行了流行病学调查。结果：低体重儿８１７７例，发生率７３．２２‰；低体重儿死亡５１６例，死亡率７９．８９‰；孕妇年龄、胎数及城乡生活水平影响低体重儿的发生。３５岁以上孕妇所生低体重儿发生率为１００．９４‰，双胎、三胎及其以上的低体重儿发生率分别为３３１．５３‰，２６５．９６‰，乡村低体重儿发生率为９４．９１‰。
An epidemiological investigation of low birth weight infants and their causes in 11,1676 perinatal infants in Sichuan Province from October 1986 to September 1987 was conducted. Results: There were 8177 cases of low birth weight infants, the incidence rate was 73.22 ‰; 516 cases of low birth weight children died, the mortality rate was 79.89 ‰; pregnant women age, number of births and urban and rural living standards affected the occurrence of low birth weight infants. The incidence of low birth weight infants over 35 years old pregnant women was 100.94 ‰, twin births, triple births and above birth weight were 331.53 ‰, 265.96 ‰, the incidence of rural low birth weight children was 94.91 ‰.