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为探讨北京某石化厂育龄女工自然流产的环境影响因素，选择首次妊娠为自然流产，且仅流产过一次的６１对２５～３０岁妇女及年龄和妊娠时间齐同的相应对照配对作为研究对象。对分析指标进行单因素卡方检验和Ｌｏｇｉｓｔｉｃ多因素回归分析。结果初步显示，嗜咸膳食（ＯＲ＝３．１７５，Ｐ＜０．０１）和接触职业毒物（ＯＲ＝２．７６１，Ｐ＜０．０５）为该地区妇女自然流产的主要危险因素；日常多吃蔬菜（ＯＲ＝０．４６８，Ｐ＜０．０５）和妊娠期乘车或骑自行车上班（ＯＲ＝０．４７４，Ｐ＜０．０５）为预防自然流产的保护因素，居住面积大（ＯＲ＝０．９３４，Ｐ＜０．０５）亦有一定影响，值得进一步深入研究。
To investigate the environmental factors affecting spontaneous abortion of women of childbearing age in a petrochemical plant in Beijing, 61 pairs of women aged 25-30 years with identical first parity as spontaneous abortion and only one miscarriage were selected as the research objects. The analysis of indicators by one-way chi-square test and Logistic regression analysis. The results showed that the main risk factors for spontaneous abortion in women in this area were tentorial salty diet (OR = 3.175, P <0.01) and exposure to occupational toxicants (OR = 2.761, P <0.05) Eating vegetables (OR = 0.468, P <0.05) and driving or gearing during pregnancy (OR = 0.474, P <0.05) were protective factors to prevent spontaneous abortion. = 0.934, P <0.05) also have some influence, it is worth further study.