Study: NCT00489034

Intervention type: BEHAVIORAL
Intervention: Quantitative Interview
Description: Index participants will be interviewed every six months (with phone interviews focused on service utilization at each six month interval midpoint) for 18 months while network members will be interviewed at baseline and one year. Interviews will consist of in-depth face-to-face and audio computer-assisted interviews (ACASIs) and a structured diagnostic interview to assess engagement in care (number of clinical visits attended), substance use, attitudes about substance use, friend's substance use, sexual risk behaviors, PTSD (for index participants only), support of index participants care use (network participants only), attitudes about healthcare (network participants only), index participant's adherence (network participants only), own functioning (network participants only), and family functioning (network participants only). At Baseline only, a urine sample will be collected from index participants for drug testing to assess the agreement between urine and ACASI.

Intervention type: BEHAVIORAL
Intervention: Quantitative Interview
Description: Index participants will be interviewed every six months (with phone interviews focused on service utilization at each six month interval midpoint) for 18 months while network members will be interviewed at baseline and one year. Interviews will consist of in-depth face-to-face and audio computer-assisted interviews (ACASIs) and a structured diagnostic interview to assess engagement in care (number of clinical visits attended), substance use, attitudes about substance use, friend's substance use, sexual risk behaviors, PTSD (for index participants only), support of index participants care use (network participants only), attitudes about healthcare (network participants only), index participant's adherence (network participants only), own functioning (network participants only), and family functioning (network participants only). At Baseline only, a urine sample will be collected from index participants for drug testing to assess the agreement between urine and ACASI.

Intervention type: BEHAVIORAL
Intervention: Ethnographic Interview
Description: Qualitative interviews will be conducted with a small sub-sample of index and identified network participants from each site at least monthly for a period of 18 months. Interviews will be ethnographic in nature and will rely on participants' life stories and narratives of social experience to supply their content and guide their progression.

Intervention type: BEHAVIORAL
Intervention: Ethnographic Interview
Description: Qualitative interviews will be conducted with a small sub-sample of index and identified network participants from each site at least monthly for a period of 18 months. Interviews will be ethnographic in nature and will rely on participants' life stories and narratives of social experience to supply their content and guide their progression.

Intervention type: BEHAVIORAL
Intervention: Gender Interview
Description: Qualitative interviews will be conducted with a sub-sample of index participants. These interviews will focus on issues of gender related vulnerabilities and will be used to develop a survey.