“…Thus, if we had been able to control for sexual variables, the apparent association between cervix cancer and cigarette smoking would probably have been reduced further. Furthermore, early sexual activity is also associated with frequency of oral contraceptive use which, in turn, has been associated with cigarette smoking (15,16) as well as cervical dysplasia (17) and possibly cervical cancer (18). We have recently shown (19) that oral contraceptive use is dependent on age, SES, and other variables which are also related to cigarette smoking.…”