The video explores the effectiveness of Alcoholics Anonymous (AA) in promoting abstinence from alcohol. It discusses the challenges of distinguishing between treatment effects and selection effects in studies, particularly in randomized controlled trials (RCTs). The video explains how crossover in RCTs can obscure genuine treatment effects and introduces the concept of intention to treat analysis. It highlights a study that corrects for crossover by focusing on marginal patients, providing insights into AA's true treatment effect. The video concludes by affirming AA's benefits and encouraging more participation.

What new insight or understanding did you gain from this video?