Stress among university students: factorial structure and measurement invariance of the Italian version of the Effort-Reward Imbalance student questionnaire

Table 3 Test of invariance of the proposed three-factor structure of the ERI-SQ between health courses (n = 2551) and other courses (n = 3897) students, and female (n = 4869) vs male students (n = 1579): results of multigroup confirmatory factor analyses

Model	S-Bχ2	df	rCFI	rRMSEA	rSRMR	Nested Model	ΔrCFI	ΔrRMSEA	ΔrSRMR
Health vs other courses
Health	178.44	51	.959	.046	.032
Non-Health	218.51	51	.963	.041	.032
M0. Configural invariance	398.06	102	.962	.045	.032
M1. Metric invariance	417.12	111	.961	.044	.035	M1-M0	−.001	−.001	.002
M2. Scalar invariance	822.39	120	.912	.063	.052	M2-M1	−.043	.019	.017
Female vs male students
Female students	303.65	51	.956	.045	.032
Male students	141.59	51	.955	.047	.036
M0. Configural invariance	445.20	102	.956	.049	.033
M1. Metric invariance	465.98	111	.955	.047	.036	M1-M0	−.001	−.002	.003
M2. Scalar invariance	547.82	120	.946	.050	.038	M2-M1	−.009	.003	.002
M3. Uniqueness invariance	576.19	132	.941	.049	.040	M3-M2	−.005	−.001	.002
M4. Structural invariance	666.14	135	.931	.053	.052	M4-M3	−.010	.004	.012

df degrees of freedom, CFI Comparative Fit Index, RMSEA Root Mean Square Error Of Approximation, SRMR Standardized Root Mean Square Residual

ISSN: 2050-7283