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

From: 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

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