In terms of changes in alcohol use, the influence of pro-drinking network ties on PDA and DDD was more influential than pro-abstinent network ties. For example, for every pro-drinking network tie present among aftercare patients there was a 9.6% reduction in PDA and a 20.1% increase in DDD; among outpatients there was 6.5% reduction in PDA and a 35.9% increase in DDD. In contrast, for every pro-abstinent network tie present among aftercare patients there was a smaller magnitude 3.4% increase in PDA and 5.0% decrease in DDD; among outpatients this effect translated into a 3.7% increase in PDA and a 9.9% decrease in DDD.
