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Risk factors for ectopic pregnancy: an Italian case-control study
F Parazzini1, L Tozzi, M Ferraroni
1Istituto di Ricerche Farmacologiche Mario Negri, II Clinica Ostetrico-Ginecologica, Università di Milano, Italy.
Obstetrics and Gynecology
|November 1, 1992
Summary
Ectopic pregnancy risk is elevated by infertility, pelvic inflammatory disease, and abdominal surgery. While smoking showed an initial association, it was not a significant risk factor after adjustments in this study.
Area of Science:
- Reproductive Health
- Gynecology
- Epidemiology
Background:
- Ectopic pregnancy poses significant health risks to women.
- Identifying risk factors is crucial for prevention and early diagnosis, particularly in lower-risk populations.
Purpose of the Study:
- To investigate the risk factors associated with ectopic pregnancy.
- To analyze these factors in a population not typically considered high-risk.
Main Methods:
- A case-control study was conducted in Milan involving 120 ectopic pregnancy cases and 209 controls.
- Controls were women who delivered healthy infants at term in the same hospitals.
Main Results:
- Infertility or conception difficulties significantly increased ectopic pregnancy risk (RR 4.7).
- History of abdominal surgery (RR 2.4) and pelvic inflammatory disease (RR 2.7) were also associated with higher risk.
- Increased number of sexual partners showed a trend towards increased risk.
Conclusions:
- Infertility, pelvic inflammatory disease/salpingitis, and abdominal surgery are key risk factors for ectopic pregnancy.
- Sexual habits may also play an independent role in ectopic pregnancy risk.