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对北京地区1990年期间经手术、病理或腹腔镜检查确诊的1420例全部新发宫外孕病例中的708例带器宫外孕者,根据IUDs类型分层对宫外孕与IUDs类型之间的关系进行了相对危险分析。结果表明,带器宫外孕的发生取决于IUDs预防宫内孕的效果,并且与其类型密切相关,该结论通过对IUDs类型的分层相对危险分析得以证实。分层分析表明,各种IUDs对宫外孕的发生有不同的影响,因此妇女选择和使用节育效率和安全性高的IUDs对降低宫外孕发生的危险非常重要。研究结果进一步显示,在非妊娠对照中,仅TCu对宫外孕发生有明显的保护作用(其ORmh为0.44,P<0.05);在妊娠对照中,各种IUDs的ORmh均大于1,表明如果使用失败,各种IUDs均增加宫外孕发生的危险。即使对宫外孕有明显保护作用的TCu一旦使用失败,其保护作用也随之降低。
708 cases of ectopic pregnancy in 1420 newly diagnosed cases of ectopic pregnancy diagnosed by surgery, pathology or laparoscopy in Beijing in 1990 were stratified according to the type of IUD. The relationship between ectopic pregnancy and the type of IUD was relative risk analysis. The results showed that the occurrence of ectopic pregnancy with IUDs depends on the effectiveness of IUDs in preventing intrauterine pregnancy and is closely related to its type. This conclusion is confirmed by stratified relative risk analysis of IUDs. Hierarchical analysis showed that various IUDs have different effects on the occurrence of ectopic pregnancy. Therefore, it is very important for women to choose and use IUDs with high contraceptive efficiency and safety in reducing the risk of ectopic pregnancy. The results further showed that only TCu had a significant protective effect on ectopic pregnancy (ORmh was 0.44, P <0.05) in non-pregnant controls; ORmh of various IUDs was greater than 1 in gestational controls, indicating that if the use fails , Various IUDs increase the risk of ectopic pregnancy. Even if TCu, which has a significant protective effect on ectopic pregnancy, fails to be used, the protective effect of TCu decreases.