Table 1.

Primary, secondary, and other outcome measures: operationalization and schedule.

Constructs	Measures and operationalization	Measurement schedules
		Baseline	3 months	6 months	9 months	12 months
Sexual risk (Pa)	Condom-less anal sex partners as well as sex acts with the most recent 3 partners [97]	xb	x	x	x	x
Condom use intentions and self-efficacy (P)	Condom Use Intentions Scale–11 items; Condom Use Self-Efficacy Scale–5 items [69,70]	x	x	x	x	x
HIV testing (P)	Self-reported history of testing for HIV in the previous 3 months [98]	x	x	x	x	x
HIV knowledge (Sc)	Knowledge of HIV transmission and prevention [99]	x	x	—d	—	x
Motivation and behavioral skills (S)	Motivation (eg, motivation to become safer), social norms (eg, partners’, friends’, or family members’ opinions about condom use), and behavioral skills (eg, negotiating condom use) [69]	x	x	x	x	x
Condom errors (S)	Adapted condom errors questionnaire–15 items [100]	x	x	x	x	x
Substance use (Oe)	Alcohol use disorders identification test, cannabis use disorders identification test, past 3-month use of illicit drugs [101]	x	x	x	x	x
PrEPf (O)	PrEP knowledge, current and past 3-month PrEP use, PrEP adherence, motivation to start PrEP, and reasons for discontinuation [102,103]	x	x	x	x	x

^aP: primary outcomes.

^bMeasure is assessed.

^cS: secondary outcomes.

^dMeasure is not assessed because the first-tier intervention was the only one to focus on HIV information. As such, HIV knowledge was assessed before and after this intervention (baseline and 3-month assessments), as well as the final time point (12-months) to assess knowledge retention.

^eO: other outcomes.

^fPrEP: pre-exposure prophylaxis.