Measurement invariance and adapted preferences: evidence for the ICECAP-A and WeRFree instruments

Table 4 Measurement invariance of the ICECAP-A per subsample

Subsample	Model	Χ² (df)	CFI	RMSEA (90% CI)	SRMR	Δ Χ² (Δ df)	Δ CFI	Δ RMSEA	Δ SRMR
Health condition	Configural invariance	100.77 (24)	0.994	0.062 (0.049–0.074)	0.013
	Metric invariance	164.46 (52)	0.991	0.051 (0.042–0.059)	0.031	63.69 (28)	-0.003	-0.011	0.017
	Scalar invariance	293.06 (80)	0.983	0.056 (0.049–0.063)	0.039	128.60 (28)	-0.008	0.006	0.008
	Residual invariance	652.75 (115)	0.957	0.074 (0.069–0.080)	0.063	359.69 (35)	-0.026	0.018	0.024
Age	Configural invariance	107.51 (18)	0.994	0.066 (0.054–0.078)	0.014
	Metric invariance	154.11 (38)	0.992	0.052 (0.043–0.060)	0.028	41.33 (20)	-0.002	-0.014	0.014
	Scalar invariance	310.23 (58)	0.982	0.062 (0.055–0.069)	0.034	159.37 (20)	-0.009	0.010	0.007
	Residual invariance	431.51 (83)	0.976	0.061 (0.055–0.066)	0.038	124.29 (25)	-0.007	-0.001	0.004
Gender	Configural invariance	85.82 (6)	0.995	0.062 (0.051–0.074)	0.012
	Metric invariance	90.45 (10)	0.995	0.048 (0.040–0.058)	0.015	4.63 (4)	0.000	-0.014	0.002
	Scalar invariance	162.36 (14)	0.990	0.056 (0.048–0.063)	0.022	71.91 (4)	-0.005	0.007	0.008
	Residual invariance	182.10 (19)	0.989	0.050 (0.044–0.057)	0.025	19.74 (5)	-0.001	-0.006	0.003
Education	Configural invariance	92.66 (9)	0.994	0.064 (0.052–0.076)	0.013
	Metric invariance	100.89 (17)	0.994	0.047 (0.038–0.055)	0.017	8.23 (8)	-0.000	-0.017	0.004
	Scalar invariance	137.35 (25)	0.992	0.044 (0.037–0.052)	0.020	36.45 (8)	-0.002	-0.002	0.003
	Residual invariance	186.80 (35)	0.990	0.044 (0.038–0.050)	0.025	49.46 (10)	-0.003	-0.001	0.005

Chi-score (Χ), Comparative Fit Index (CFI), Degrees of freedom (df), Root Mean Squared Error of Approximation (RMSEA) with 90% Confidence Intervals (CI), Standardized Root Mean Residual (SRMR).

ISSN: 1477-7525