Table 2.

Multivariate analysis of the factors associated with PrEP use among MSM from Brazil and Portugal, 2020.

Variables	β	aPR	95% CI		p-Value
			Lower	Upper
Portugal: multivariate analysis 1
≥2 casual sex partners per month	3.469	32.11	10.40	99.14	<0.001
Routinely undergoing HIV tests	2957	19.23	11.20	33.03	<0.001
Disclosing serological status in apps	0.741	2.02	1.88	2.34	<0.001
Being bisexual	0.393	1.48	1.33	1.64	<0.001
Being an immigrant	0.310	1.36	1.24	1.50	<0.001
Being fond of challenging sexual practices *	0.253	1.29	1.16	1.43	<0.001
Knowing the partner’s serological status	0.248	1.28	1.06	1.56	0.012
Frequent bareback sex	0.146	1.16	1.02	1.30	0.018
Brazil: multivariate analysis 2
Routinely undergoing HIV tests	3.467	32.04	17.23	59.59	<0.001
≥2 casual sex partners per month	3.436	31.05	9.99	96.42	<0.001
Not knowing the partner’s serological status	0.806	2.24	2.03	2.47	<0.001
Disclosing serological status in apps	0.774	2.17	1.97	2.39	<0.001
Being in a polyamorous relationship	0.634	1.89	1.60	2.23	<0.001
Being single	0.355	1.43	1.25	1.63	<0.001
Being fond of casual sex	0.220	1.25	1.12	1.39	<0.001
Being fond of challenging sexual practices *	0.216	1.24	1.13	1.36	<0.001
Schooling level	0.126	1.14	1.03	1.26	0.014
Frequent bareback sex	0.120	1.13	1.01	1.25	0.027
Group sex	−0.168	0.85	0.76	0.94	0.002
Being an immigrant	−0.192	0.83	0.74	0.92	0.001

95% CI: 95% confidence interval. aPR: adjusted prevalence ratio; the best Akaike and likelihood criteria were evaluated. ¹ Omnibus test (p < 0.001)/ROC curve: 0.933 (0.925–0.942); p < 0.001; AIC: 2377.4; LLR: −1178.7; deviance: 933.4. ² Omnibus test (p < 0.001)/ROC curve: 0.938 (0.931–0.945); p < 0.001; AIC: 3395.8; LLR: −1683.9; deviance: 1427.8. * Cruising, chemsex, fisting or footing, and/or double penetration.