Colin MacKenzie M.D.
January 5, 2020

A study published in the journal, Alcoholism: Clinical and Experimental Research, used newly devised statistical techniques to analyse 5 prior Institute of Health - funded studies to assess whether positive results derived from attending Alcoholics Anonymous (AA) programs was due to a self-selection bias (In this study, a self-selection bias refers to those people who are self-motivated enough to select regular attendance at AA meetings (a self-selection) are also more likely to succeed in AA simply due to their motivation to succeed) or due to actual therapeutic benefits of the programs.  For decades, prior studies purporting benefits from AA programs were criticized for not controlling for self-selection bias.  However, this study claims to have controlled for (or eliminated) this bias from their results which demonstrated that AA programs due confer benefits that increase attendees' chances of extended sobriety.  

To read the study titled, "Estimating the efficacy of Alcoholics Anonymous without self-selection bias: An instrumental variables re-analysis of randomized clinical trials", by Keith Humphreys, Ph.D., Janet C. Blodgett, M.Sc., and Todd H. Wagner, Ph.D., go to the link below: