Table 4 presents the results of multivariate logistic regression analysis in the form of odds ratios and 95% confidence intervals for the associations among alcohol drinking, cigarette smoking, and sexual intercourse initiation with suicidal ideation and suicide attempts, after controlling for all covariates. As observed in the descriptive analysis, although the magnitudes of the associations of problem behaviors with suicidal behaviors were considerably attenuated when covariates were taken into account, their associations remained significant, except with regard to some male and female teen or preteen initiators. This finding indicated that preteen initiation of alcohol drinking, cigarette smoking, and sexual intercourse was independently and significantly associated with elevated likelihood of suicidal ideation and suicide attempts in both genders. Moreover, such associations were stronger among the preteen initiator group than among the teen initiator and non-initiator groups.
