Factors associated with cannabis nonuse and cessation of use: between and within survey replications of findings.

Multivariate analyses (Multiple Classification Analyses) of data obtained from repeated surveys (1981 and 1983) of students (grades 7-13) supported the separate consideration of three aspects of cannabis use and nonuse: not trying cannabis; trying and quitting cannabis use; and trying and continuing cannabis use. Marked consistency was found in results obtained from between and within-survey replications. Many variables which exhibited bivariate relationships with cannabis use were not significant when considered multivariately. Few variables were related to both trying vs. continuing cannabis use. Variables which were expected to be related to cannabis use failed to show a significant relationship, most notably those measuring perceived threat of legal consequences, problems at home, problems outside the home, and threats to health. Methodological and substantive, especially educational/prevention, implications are highlighted.