%0 Journal Article %J Substance use & misuse %D 2012 %T A social network approach to demonstrate the diffusion and change process of intervention from peer health advocates to the drug using community. %A Li, Jianghong %A Weeks, Margaret R %A Borgatti, Stephen P %A Clair, Scott %A Dickson-Gomez, Julia %K Diffusion of Innovation %K Drug Users %K Health Promotion %K Humans %K Patient Advocacy %K Peer Group %K Risk Reduction Behavior %K Social Support %K Substance-Related Disorders %N 5 %P 474-90 %R 10.3109/10826084.2012.644097 %V 47 %X Project RAP (Risk Avoidance Partnership) trained 112 active drug users to become peer health advocates (PHAs). Six months after baseline survey (N(bl) = 522), 91.6% of PHAs and 56.6% of community drug users adopted the RAP innovation of giving peer intervention, and 59.5% of all participants (N(6m) = 367) were exposed to RAP innovation. Sociometric network analysis shows that adoption of and exposure to RAP innovation was associated with proximity to a PHA or a highly active interventionist (HAI), being directly linked to multiple PHAs/HAIs, and being located in a network sector where multiple PHAs/HAIs were clustered. RAP innovation has diffused into the Hartford drug-using community. %8 2012 Apr