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 90Â days [48,49,50] | X | X | X | X | X | |
ART adherence and viral suppression | Adherence over 7, 30, and 90Â days [49]; self-reported viral load | X | X | X | X | X | |
Lab-collected viral load (baseline and 12Â months only) | X | Â | Â | Â | 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Communication Skills Test – Positive and Negative scales – Adapted (Jenkins N, Saiz CC: The communication skills test, unpublished) | X | X | X | X | X | |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 | Â | Â | Â | X |