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Research design.
| Group | Pretest | Post-Test | Pretest | Intervention | Post-Test |
|---|---|---|---|---|---|
| Control group | C1 | C2 | |||
| Experimental group | E1 | X | E2 |
C1, E1 = general characteristics, alcohol-related knowledge, alcohol outcome expectancy, drinking refusal self-efficacy, alcohol abstinence intention; C2, E2 = alcohol-related knowledge, alcohol outcome expectancy, drinking refusal self-efficacy, alcohol abstinence intention; X = alcohol-related harm prevention program.
