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作者访问了所有居住在华盛顿King County的20～39岁的已婚妇女,她们在1979年和1981年间首次诊断为不孕。作者选择了输卵管不孕,如果因为人工流产在不孕中起作用,最可能的机制是通过感染影响输卵管。医师根据异常的子宫输卵管碘油造影、腹腔镜、开腹探查,鉴定输卵管异常。对已做人工流产的妇女,作者了解了做流产的地点、日期、方法、流产时的妊娠周数,及是否感染或出血。已访问的461例继发不孕妇女中146例诊断为输卵管不孕。以473例继发不孕患者作为对照,根据条件,保留127例不孕患者和395例对照者,作者应用逻辑回归技术进行统计分析。其结果
The author interviewed all married women aged 20 to 39 who live in King County, Washington. They first diagnosed infertility between 1979 and 1981. The author chose tubal infertility, if because of abortion in infertility play a role, the most likely mechanism is affected by tubal infection. Physicians based on abnormal uterine tubal lipiodol angiography, laparoscopy, laparotomy, identification of tubal abnormalities. For women who have made an abortion, the author learns the location, date, method of abortion, number of weeks of gestation at abortion, and any infection or bleeding. Among the 461 cases of secondary infertility women visited, 146 cases were diagnosed as tubal infertility. 473 cases of secondary infertility patients as a control, according to the conditions, retained 127 cases of infertility and 395 controls, the authors applied the logistic regression technique for statistical analysis. the result