Translation, cultural adaptation and validity assessment of the Dutch version of the eHealth Literacy Questionnaire: a mixed-method approach

Table 3 Results of invariance testing among a priori subgroups (n = 1650)

	X²	DF	CFI	TLI	RMSEA (95% CI)	SRMR	ΔΧ²	ΔDF	P-value significance level
Age (18–45 yr vs ≥ 45 yr)
Configural invariance	8040	1078	0.939	0.932	0.089	0.088
Metric invariance	8348	1106	0.936	0.931	0.089 (0.089—0.091)	0.090	80.919	28	< .001
Partial metric invariance ^a	8186	1102	0.938	0.933	0.088 (0.087–0.089)	0.089	41.310	24	< .05
Scalar invariance	8402	1168	0.936	0.935	0.087(0.085 – 0.088)	0.088	68.921	62	n.s
Gender (male vs female)
Configural invariance	8004	1078	0.937	0.930	0.088 (0.087 -0.090)	0.089
Metric invariance	8252	1006	0.935	0.934	0.086 (0.084—0.088)	0.089	54.740	28	< .001
Partial metric invariance ^b	8136	1103	0.936	0.93	0.088 (0.086—0.090)	0.089	34.861	25	n.s
Scalar invariance	8237	1167	0.935	0.934	0.086 (0.084 -0.088)	0.089	12.720	61	n.s
Education (low and middle vs high)
Configural invariance	7733	1078	0.940	0.933	0.087 (0.085–0.088)	0.085
Metric invariance	8026	1106	0.937	0.933	0.087 (0.085—0.089)	0.087	51.676	28	< .01
Partial metric invariance ^c	7891	1103	0.938	0.933	0.087 (0.085—0.088)	0.086	36.055	25	n.s
Scalar invariance	8068	1169	0.938	0.936	0.085 (0.083–0.086)	0.085	58.695	63	n.s
Diagnosis (yes vs no)
Configural invariance	8080	1078	0.937	0.93	0.089 (0.087 -0.091)	0.088
Metric invariance	8382	1106	0.935	0.930	0.089 (0.088—0.091)	0.090	73.577	28	< .001
Partial metric invariance ^d	8198	1102	0.936	0.931	0.088 (0.087—0.090)	0.089	32.745	24	n.s
Scalar invariance	8343	1168	0.935	0.934	0.086 (0.085—0.088)	0.089	18.489	62	n.s

CFI Comparative fit index, CI 90% confidence interval, DF Degrees of freedom, RMSEA Root mean squared error of approximation, SRMR Standardised root mean squared residual, n.s Non-significant
^alifted restrictions on loadings of items 15, 21, 23 and 26
^blifted restrictions on loadings of items 20, 19 and 29
^clifted restrictions on loadings of items 10, 14, 22, 30 and 31
^dlifted restrictions on loadings of items 11, 19, 23 and 25

ISSN: 1471-2458