Analysis of changes in social network variables and in use of AA also supported the utility of the Network Support treatment. As noted in our earlier report (Litt et al., 2007), changes in the social network took the form of increases in behavioral and attitudinal support for abstinence, and increase in abstinent friends, rather than decreases in support for drinking. That is, participants in the Network Support treatment tended to add non-drinking members to their social networks rather than eliminate drinkers, a change in network composition that persisted for two years following treatment. This resulted in a small increase in Network size for NS relative to the other treatments by 27 months (4.0 people v. 3.3 for NS+CM and 3.1 for CaseM).
