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Table 1 Primary and secondary outcomes and assessment schedule

From: Protocol for an attention-matched randomized controlled trial of 2GETHER: a relationship education and HIV prevention program for young male couples

Outcome type

Construct

Measure/operationalization

Measurement schedule

Baseline

3 mos

6 mos

9 mos

12 mos

Primary

HIV risk behavior

Condomless anal sex with a serodiscordant main partner or any casual partner [46]

X

X

X

X

X

STI incidence

Urethral and rectal Chlamydia and Gonorrhea – Aptima Combo 2 GC/CT nucleic acid amplification test [47]

X

   

X

Secondary: dyadic HIV risk

Relationship agreements

Partner concordance in (non)-monogamy agreement type and rules

X

X

X

X

X

Agreement breaks

Past 3-month breaks in (non)-monogamy agreement rules

X

X

X

X

X

Secondary: HIV prevention and care continua

HIV/STI testing

Past 3-month HIV and STI testing history

X

X

X

X

X

PrEP use and adherence

Current and past 3-month PrEP use; adherence over 7, 30, and 90 days [48,49,50]

X

X

X

X

X

ART adherence and viral suppression

Adherence over 7, 30, and 90 days [49]; self-reported viral load

X

X

X

X

X

Lab-collected viral load (baseline and 12 months only)

X

   

X

Secondary: relationship functioning

Relationship satisfaction

Couples Satisfaction Index – 4-items [51]

X

X

X

X

X

Communication (self-report)

Communication Skills Test – Positive and Negative scales – Adapted (Jenkins N, Saiz CC: The communication skills test, unpublished) 

X

X

X

X

X

Communication (objective)

10-min recorded communication task [52,53,54], coded with Interactional Dimensions Coding System [55]

X

   

X