Summarizing health-related quality of life (HRQOL): development and testing of a one-factor model

Table 5 Multi-group confirmatory factor analysis for measurement invariance across years, sex, and age subgroups

Models	χ² (df)	RMSEA	CFI	TLI	SRMR	CD	ΔCFI
BRFSS 2001-2010 (year subgroups)
Full configural invariance	5430 (10)	0.041	0.987	0.925	0.011	0.88	−
Full metric invariance	5648 (37)	0.022	0.987	0.979	0.012	0.88	0
Full scalar invariance	10107 (64)	0.022	0.977	0.978	0.014	0.879	0.01
BRFSS 2011-2013 (year subgroups)
Full configural invariance	2685 (3)	0.044	0.987	0.923	0.012	0.884	−
Full metric invariance	2696 (9)	0.025	0.987	0.974	0.012	0.884	0
Full scalar invariance	2794 (15)	0.02	0.987	0.984	0.012	0.884	0
BRFSS 2001-2010 (male vs. female)
Full configural invariance	10443 (2)	0.057	0.997	0.981	0.01	0.879	−
Full metric invariance	12243 (5)	0.039	0.996	0.991	0.012	0.879	0.001
Full scalar invariance	23654 (8)	0.043	0.993	0.989	0.019	0.881	0.003
BRFSS 2011-2013 (male vs. female)
Full configural invariance	5159 (2)	0.06	0.997	0.98	0.011	0.884	−
Full metric invariance	5788 (5)	0.041	0.996	0.991	0.012	0.884	0.001
Full scalar invariance	9425 (8)	0.041	0.994	0.991	0.017	0.885	0.002
BRFSS 2001-2010 (young vs. old ages)
Full configural invariance	3587 (2)	0.034	0.999	0.994	0.007	0.877	−
Partial metric invariance	13086 (3)	0.053	0.996	0.984	0.014	0.87	0.003
Full metric invariance	62559 (5)	0.089	0.981	0.955	0.038	0.866	0.018
BRFSS 2011-2013 (young vs. old ages)
Full configural invariance	2256 (2)	0.04	0.999	0.991	0.008	0.883	−
Partial metric invariance	7096 (3)	0.058	0.996	0.982	0.013	0.879	0.003
Full metric invariance	29614 (5)	0.092	0.981	0.955	0.035	0.874	0.018

Full configural invariance – same factor structure across groups; full metric invariance-equivalent factor loadings across groups; full scalar invariance – equivalent intercepts across groups; partial metric invariance – equivalent factor loadings across groups except factor loadings for mentally unhealthy day item. Age subgroups: young (18-64) and old (65+)

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