Table 1.

Summary of Results from the 7^th and 8^th Grade Follow-ups of the West Coast Project ALERT Evaluation (Ellickson & Bell, 1990a)^a

Variables	Logically Possible Comparisons	Comparisons Reported by Ellickson & Bell (1990a)	Statistically Significant Positive Results	Statistically Significant Negative Results
Alcohol Use	68	54	2	1
Cigarette Use	86	64	6	4
Marijuana Use	70	46	6	0

Notes

^aThe total subgroup analyses for each drug was a function of the number of follow-up points, study conditions, risk groups, and outcome variables. For each drug, there were 3 follow-up points (3-, 12- and 15-month) and 3 study conditions (ALERT-teacher taught; ALERT-teacher and peer taught; control). There were also 3 risk subgroups for each drug, although the definitions of these differed. For alcohol and cigarettes, the subgroups were “nonusers”, “experimenters” and “users”. The former were those who had never used the drug, experimenters those who had used the drug <3 times and not in the previous month, and users those who had used ≥3 times in the previous year or at any point during the previous month. In the case of marijuana, the 3 subgroups were based on prior use of marijuana and prior use of cigarettes (since use of marijuana was relatively infrequent). Those who had used neither drug at baseline were defined as non-users, marijuana nonusers/cigarette as experimenters, and users of both drugs as users. Finally, there were 5 outcome variables assessed at follow-up for alcohol and marijuana, and 6 for cigarettes.