Table 1 Key outcome measures including domains of the RE-AIM framework [54]

Feasibility

- Rate of eligibility: percentage of eligible participants recruited

Case-report form; descriptive statistics

- Participation and retention at 3 months follow-up: percentage of enrolled participants retained at 3 months

Reach

- Proportion of patients screened at baseline

Numerator: Total number of completed screens

Denominator: Total number of all patients eligible for screening

- Proportion of consulting patients intervened at baseline

Numerator: Total number of screen-positive patients receiving advice

Denominator: Total number of patients screened positive

Effectiveness

- Change in AUDIT-C score between baseline and follow-up amongst patients with risky, hazardous or harmful drinking

Adoption

- Proportion of staff invited that participated

Numerator: Total number of participating physicians

Denominator: Total number of primary care physicians invited

- Description and representativeness of staff who delivered the screening and advice (PHC provider level)

Implementation

- Quality and consistency of the delivery of ASBI given (PHC provider level; patient level) measured by quantitative interviews, provider focus groups

Provider questionnaire; provider focus groups;

descriptive statistics and qualitative data analyses (content and narrative analyses)

- Implementation determinants (barriers, facilitators) of ASBI delivery (PHC provider, Patient level) collected by quantitative interviews, provider focus groups

- Cost of intervention: Average time spent in minutes per patient for screening and for brief intervention.

Maintenance

- Potential extent to which the intervention package becomes institutionalised (PHC provider level; patient level) collected by quantitative interviews, provider focus groups