[A cohort study on cancer of uterine cervix in Jingan county, Jiangxi province].

A cohort study on 24,628 married women beyond 30 years of age in Jingan county, Jiangxi province was carried out from 1974 to 1985. It was equivalent to 207,490 person-year. The results showed that the earlier the first sexual intercourse the higher the risk of cervical cancer. There was a significant linear trend. The relative risk (RR) of cervical cancer in women increased from 1.63 to 6.85 with increase in the number of sex partners from one to two or more. The risk also increased from 1.44 to 5.38 and 2.69 as their husband had one, two or three and more extramarital sex partners. Irregular menstruation and insanitary mentrual pads were also risk factors. Risk factors of menarche age, age of first delivery, number of children, smoking and drinking were balanced in the present analysis by the logistic regression model.