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Epidemiology of endometriosis in infertile women
R Matorras1, F Rodíquez, J I Pijoan
1Hospital of Cruces, Baracaldo, País Vasco University, Bilbao, Spain.
Objective:
To assess the epidemiological factors linked to endometriosis in infertile women.
Setting:
Academic tertiary hospital.
Design:
Case-control study.
Patients:
One hundred seventy-four infertile women with endometriosis and 174 infertile women without endometriosis, all of them studied by laparoscopy.
Results:
Women with endometriosis and infertility had a higher frequency of cycles < or = 27 days (26.4% versus 16.7%). A trend to a protective effect of smoking was detected. Social class, reproductive history, infertility history, previous abortions, age, family history, age at menarche, and duration of menstrual flow were similar in both groups.
Conclusion:
Cycles < or = 27 days was the only risk factor that seemed to be associated to endometriosis in infertile patients. However, predictive values were low. A trend to a protective effect of smoking was detected.