Normative re-education: Electronic/mailed personalized normative feedback (PNF)—Event-specific prevention (21^st birthday cards)

Effectiveness ratings are based on the percentage of studies reporting any positive outcomes. Strategies with three or fewer studies did not receive an effectiveness rating due to the limited data on which to base a conclusion. Cost ratings are based on the relative program and staff costs for adoption, implementation, and maintenance of a strategy. Actual costs will vary by institution, depending on size, existing programs, and other campus and community factors. Barriers to implementing a strategy include cost and opposition, among other factors. Public health reach refers to the number of students that a strategy affects. Strategies with a broad reach affect all students or a large group of students (e.g., all underage students); strategies with a focused reach affect individuals or small groups of students (e.g., sanctioned students). Research amount/quality refers to the number of randomized controlled trials (RCT) that evaluated the strategy. Duration of effects refers to the timeframe within which the intervention demonstrated effects on alcohol-related behavioral outcomes; follow-up periods for short-term effects were <6 months; follow-up periods for long-term effects were ≥6 months.