Table 2.

List of study instruments, data elements and source of information

Data collection instruments	Time period	Data collected	Source
Screening questionnaire	Day of enrolment	Eligibility assessment	Self-report
Participant assessment	Baseline 3, 6, and 12 month follow up	Demographic information, alcohol consumption, social problem solving styles, motivation/readiness to change, antiretroviral therapy (ART) history, adherence to ART, psychosocial factors associated with ART adherence (disclosure, HIV/AIDS stigma, social support, adherence self-efficacy), alcohol and ART beliefs, HIV-related factors (e.g. degree of ill-health between HIV diagnosis and ART initiation), clinical/structural factors (e.g. length of time to doctor), physical functioning (e.g. limitations due to physical health, bodily pain, vitality), general physical well-being, mental well-being, drug and tobacco use	Self-report
Laboratory report form	Baseline, 3, 6, 12 month follow up	HIV-related outcomes: viral load (baseline and 12-month follow up assessments only) and CD4 counts	Laboratory report
		Alcohol biomarkers: Posphatidylethanol (PEth)
Process evaluation interview schedule	12-months follow-up	A randomly selected 10% subsample will respond to a qualitative interview regarding impressions of the degree to which the intervention helped or hindered behaviour change	Self-report