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Table 8
ZAP – Confirmatory factor analysis - Model fit in younger and older children
Model		Chi2	Df	p-value	CFI	RMSEA	SRMR
"Child"-Scales
Model 0	Unconstrained basic model	424	148	<0.000	0.96	0.62	0.040
Model 1	Constrained regression weights, covariances, and error terms	508	176	<0.000	0.95	0.063	0.050
	Model 1 vs. Model 0	84	28	<0.000
Model 2	Constrained regression weights and covariances	447	162	<0.000	0.96	0.063	0.040
	Model 2 vs. Model 0	23	14	0.06
Model 3	Constrained regression weights	434	159	<0.000	0.96	0.063	0.040
	Model 3 vs. Model 0	10	11	0.53
"Parent“-Scales
Model 0	Unconstrained basic model	692	282	<0.000	0.95	0.049	0.049
Model 1	Constrained regression weights, covariances, and error terms	820	326	<0.000	0.94	0.05	0.064
	Model 1 vs. Model 0	128	44	<0.000
Model 2	Constrained regression weights and covariances	763	306	<0.000	0.94	0.049	0.06
	Model 2 vs. Model 0	71	24
Model 3	Constrained regression weights	720	296	<0.000	0.95	0.048	0.051
	Model 3 vs. Model 0	28	14	0.014

Legend:

Chi² = Chi-Square-Statistic Df = Degrees of freedom CFI = Comparative Fit Index.

RMSEA = Root-Mean-Square-Error of Approximation SRMS = Standardized-Root-Mean.

Square-Residual.

Bitzer et al. BMC Health Services Research 2012 12:347 doi:10.1186/1472-6963-12-347

Table 8