Applicability and clinical utility of the German rivermead post-concussion symptoms questionnaire in proxies of children after traumatic brain injury: an instrument validation study

Table 4 Fit indices and model comparisons of the one- and three-factor models for the RPQ proxy

Confirmatory Factor Analyses										Model Comparison
Model	χ2	df	χ2/df	p	CFI	TLI	RMSEA	CI90%	SRMR	∆χ2 (∆df)	p
One-factor	225.12	104	2.16	< 0.001	0.96	0.95	0.09	[0.07, 0.11]	0.12	–	–
Three-factor	149.30	101	1.48	0.001	0.98	0.98	0.06	[0.04, 0.08]	0.10	51.44 [3]	< 0.001

χ2 = scaled chi-square value, df = scaled degree of freedom, χ2/df = ratio (cut-off: ≤ 2), p = scaled p-value, CFI = scaled Comparative Fit Index (cut-off: ≥ 0.95), TLI = scaled Tucker-Lewis Index (cut-off: ≥ 0.95), RMSEA = scaled root mean square error of approximation (cut-off: ≤ 0.08) with 90% confidence interval (CI), SRMR = standardized root mean square (cut-off: ≤ 0.08), ∆χ2 = chi-square value of the difference test, ∆df = degrees of freedom of the difference test. Values in bold indicate at least satisfactory model fit according to the respective cut-offs, values in italics are significant at 5%.

ISSN: 1471-2377