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Table 2 Fit Statistics of the Italian Perceived Vulnerability to Disease Questionnaire (I-PVDQ) invariance models across genders

From: The psychometric properties and gender invariance of the Italian version of the Perceived Vulnerability to Disease Questionnaire (I-PVDQ) during the COVID-19 pandemic

Model

χ2 (df)

CFI

RMSEA

Model comparison

Δχ2 (Δdf)

p

ΔCFI

ΔRMSEA

Gender

Configural

394.318 (178)

.927

.070

–

–

–

–

–

Metric

410.292 (191)

.926

.068

Metric-configural

15.974 (13)

< .025

− .001

− .002

Scalar

433.065 (204)

.923

.067

Scalar–metric

22.773 (13)

.05

− .003

− .001

Strict

468.308 (219)

.916

.068

Strict-scalar

35.243 (15)

< .005

− .007

.001

  1. df degrees of freedom; CFI comparative fit index; RMSE Root Mean Square Error of Approximation; Δ difference between nested models; p probability value of Δχ2 test. Metric equality of factor loadings; Scalar = Metric + equality of intercepts, Strict Scalar + equality of error variances