Workers assigned to participate in Alcoholics Anonymous self-help groups reduced their drinking problems over a two-year period.
Furthermore, compulsory AA groups (n=83) did not significantly differ from compulsory inpatient treatment (N=73) in their effects on job-related outcomes of participants.
Costs of inpatient treatment averaged 10 percent less for AA participants than for hospital rehabilitation participants.
Walsh, D. C., R. W. Hingson, D. M. Merrigan, et al. (1991). A Randomized Trial of Treatment Options for Alcohol-Abusing Workers. The New England Journal of Medicine 325(11): 775-782.