Prevalence and risk factor of endometriosis in Guangdong area

Objective To investigate the prevalence and risk factor of endometriosis in Guangdong province.Methods A case-control study was designed based on data from an epidemiological investigation among reproduction-aged women from 2003 to 2007 in Guangdong province.Patient group were 188 cases who were diagnosed endometriosis by laparoscopy or pathology.Controls included 271 reproductive aged women,sampled randomly among healthy population.Menstruation,gravidity,medical history,family history,life style and kinds of labor were compared between the two groups,and multifactor Logistic regression was used to screen associated factors.Results Body mass index(BMI) 20 kg/m2(OR = 5.823,95% CI 1.834 ～ 18.491),induced abortion(OR = 5.483,95% CI 1.056 ～ 28.472),spontaneous abortion(OR = 34.207,95% CI 1.480 ～ 790.783),and worse daily health habits(OR = 14.784,95% CI 3.737 ～ 58.488),gravidity more than once(OR = 0.024,95% CI 0.004 ～ 0.161) were associated with endometriosis in local region.Conclusions A low BMI value,induced abortion,spontaneous abortion,worse daily health habits are high risk factors of endometriosis,whereas multi-pregnancy is a protective factor of endometriosis in Guangdong area.