Table 3.
Linear regression models demonstrating the moderating effect of current PrEP use on the association between standardized PRHS and HIRI-MSM scores (n=4092).a
| Variable | Model 1 | Model 2 | Model 3 | Full model | |||||||||||||
| β (95% CI) | P value | β (95% CI) | P value | β (95% CI) | P value | β (95% CI) | P value | ||||||||||
| Intercept | 0 (–0.03 to 0.03) | 0.99 | .05 (0.02 to 0.08) | .001 | .06 (0.02 to 0.09) | <.001 | –.11 (–0.21 to –0.01) | .04 | |||||||||
| HIRI-MSMb score, standardized | .19 (0.16 to 0.22) | <.001 | .23 (0.20 to 0.26) | <.001 | .27 (0.24 to 0.30) | <.001 | .26 (0.22 to 0.29) | <.001 | |||||||||
| Current PrEPc use | N/Ad | N/A | –.52 (–0.62 to –0.41) | <.001 | –.31 (–0.43 to –0.19) | <.001 | –.36 (–0.48 to –0.23) | <.001 | |||||||||
| HIRI:PrEP interaction | N/A | N/A | N/A | N/A | –.30 (–0.39 to –0.21) | <.001 | –.30 (–0.39 to –0.21) | <.001 | |||||||||
| Race | |||||||||||||||||
|
|
Blacke | N/A | N/A | N/A | N/A | N/A | N/A | .04 (–0.07 to 0.14) | .49 | ||||||||
|
|
Pardoe | N/A | N/A | N/A | N/A | N/A | N/A | .02 (–0.05 to 0.09) | .61 | ||||||||
| Education | |||||||||||||||||
|
|
University or highere | N/A | N/A | N/A | N/A | N/A | N/A | .12 (0.06 to 0.19) | <.001 | ||||||||
| State | |||||||||||||||||
|
|
Rio de Janeiroe | N/A | N/A | N/A | N/A | N/A | N/A | .03 (–0.05 to 0.10) | .48 | ||||||||
|
|
Othere | N/A | N/A | N/A | N/A | N/A | N/A | –.01 (–0.08 to 0.06) | .73 | ||||||||
| Sexual orientation | |||||||||||||||||
|
|
Gaye | N/A | N/A | N/A | N/A | N/A | N/A | .11 (0.03 to 0.19) | .007 | ||||||||
| HIV-KAf score, standardized | N/A | N/A | N/A | N/A | N/A | N/A | .12 (0.09 to 0.15) | <.001 | |||||||||
| Steady partner | |||||||||||||||||
|
|
HIV-negativee | N/A | N/A | N/A | N/A | N/A | N/A | –.24 (–0.31 to –0.18) | <.001 | ||||||||
|
|
Living with HIV or HIV-unknowne | N/A | N/A | N/A | N/A | N/A | N/A | .16 (0.05 to 0.28) | .004 | ||||||||
| Transactional sexe | N/A | N/A | N/A | N/A | N/A | N/A | .11 (–0.01 to 0.23) | .073 | |||||||||
| Last HIV test | |||||||||||||||||
|
|
6 or more months agoe | N/A | N/A | N/A | N/A | N/A | N/A | .08 (0.01 to 0.15) | .016 | ||||||||
|
|
Nevere | N/A | N/A | N/A | N/A | N/A | N/A | –.06 (–0.17 to 0.04) | .24 | ||||||||
| Adjusted R2 | 0.034 | N/A | 0.057 | N/A | 0.066 | N/A | 0.103 | N/A | |||||||||
aGiven small sample sizes, Asian (n=70), Indigenous (n=30), and respondents with missing data (n=152) were excluded.
bHIRI-MSM: HIV Incidence Risk Index-men who have sex with men.
cPrEP: pre-exposure prophylaxis.
dN/A: not applicable.
eReference categories are as follows: race: White; education: secondary or lower; Brazilian state: São Paulo; sexual orientation: other; steady partner: no steady partner; transactional sex: no; last HIV test: 6 months or less.
fHIV-KA: HIV/AIDS Knowledge Assessment.