Using Evidence-based Community and Behavioral Interventions to Prevent Skin Cancer: Opportunities and Challenges for Public Health Practice

摘要

?Before-and-after-only designStudy with comparison group(RCT, cohort design, nonrandomized trial)Absolute effect measure:post − preΔI − ΔCRelative effect measure:(post − pre)/pre × 100(ΔI/Ipre − ΔC/Cpre) ? 100 aRCT indicates randomized controlled trial; I indicates intervention; C indicates control; Δ indicates change.