From a friend:

My friend Bill White just ran across a ten year follow-up study that looked at the role of sponsorship in predicting post-treatment sobriety. Those who sponsored other AA members throughout the ten year study had a 91% end of study remission rate. The scientists are finally figuring out this helping other drunks is pretty powerful stuff.

Here’s the citation:

Cross, G.M., Morgan, C.W., Mooney, A.J., Martin, C.A. & Rafter, J.A. (1990). Alcoholism treatment: A ten-year follow-up study. Alcoholism: Clinical and Experimental Research, 14, 169-173.