Epidemiology of endometriosis in infertile women.
OBJECTIVE
To assess the epidemiological factors linked to endometriosis in infertile women.


METHODS
Academic tertiary hospital.


METHODS
Case-control study.


METHODS
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.


CONCLUSIONS
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.
Matorras
R
R
Hospital of Cruces, Baracaldo, País Vasco University, Bilbao, Spain.
Rodíquez
F
F
Pijoan
J I
JI
Ramón
O
O
Gutierrez de Terán
G
G
Rodríguez-Escudero
F
F
D000328:Adult; D016022:Case-Control Studies; D004715:Endometriosis / Q000150:complications* / Q000453:epidemiology* / Q000473:pathology; D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000150:complications*; D010535:Laparoscopy; D008597:Menstrual Cycle; D011247:Pregnancy; D012907:Smoking; D013997:Time Factors