title: Risk factors in ectopic pregnancy. Results of a population-based case-control study.
abstract: In a population-based case-control study, possible risk factors for ectopic pregnancy were compared in 119 patients with ectopic pregnancy and in 119 age-matched controls with intra-uterine pregnancy from each of the following categories: deliveries, spontaneous abortions and induced abortions. The following factors were found significantly more often in cases of ectopic pregnancy: a history of earlier ectopic pregnancy, a history of salpingitis, a history of earlier operation on the Fallopian tubes, a history of infertility, and a pregnancy that had occurred in spite of an intra-uterine contraceptive device. A history of appendectomy was also found significantly more often among the cases. There was no significant correlation between ectopic pregnancy and a history of no earlier pregnancy, earlier deliveries, earlier spontaneous or induced abortions or a history of other gynecological operations and increased risk of ectopic pregnancy. One or more of the risk factors were found in 76.5% of cases and 23% of controls.
authors.affiliation: Department of Obstetrics and Gynecology, University Hospital, Lund, Sweden.
authors.forename: F
authors.initials: F
authors.lastname: Nordenskjöld
authors.forename: M
authors.initials: M
authors.lastname: Ahlgren
mesh_terms: D000293:Adolescent; D000328:Adult; D001062:Appendectomy / Q000009:adverse effects; D016022:Case-Control Studies; D005187:Fallopian Tubes / Q000601:surgery; D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000150:complications; D007434:Intrauterine Devices; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000150:complications / Q000453:epidemiology* / Q000209:etiology; D012307:Risk Factors; D012488:Salpingitis / Q000150:complications