Psychometric properties of the European Portuguese version of the Perceived Risk of HIV Scale in the general population and HIV-uninfected partners from sero-different couples

Table 4 Differential item functioning analyses by sex and HIV testing (N = 917)

Item	Contrast	Welch t	p	∆_MH	p
Sex
1	0.00	0.00	1.00	0.09	.922
2	−0.08	−0.97	.332	0.31	.137
3	0.19	1.53	.127	0.19	.237
4	−0.50	6.84	< .001	0.73	< .001
5	0.29	3.57	< .001	0.38	< .001
6	0.08	1.12	.264	0.07	.180
7	0.21	1.80	.073	0.21	.224
8	−0.09	− 0.72	.471	0.38	.268
HIV testing
1	0.32	2.95	.003	0.85	< .001
2	0.22	2.96	.003	0.09	.010
3	0.07	0.59	.553	0.71	.266
4	0.00	0.00	1.00	0.19	.648
5	0.11	1.55	.122	0.38	.042
6	−0.15	−2.28	.023	0.33	.012
7	−0.11	−1.04	.301	0.07	.830
8	−0.59	−5.43	< .001	1.27	< .001

ISSN: 1471-2458