An investigation into the psychometric properties of the Hospital Anxiety and Depression Scale in patients with breast cancer

Table 4 Factor structure of the HADS determined by testing the fit of models derived from factor analysis.

Model	χ² df	p	RMSEA	CFI	CAIC	AIC
Zigmond and Snaith two-factor	121.77 (76)	0.001	0.07	0.92	287.08	179.77
Moorey et al. two-factor	132.16 (76)	<0.001	0.08	0.90	297.47	190.16
Friedman three-factor correlated	101.79 (74)	0.018	0.06	0.95	278.50	163.79
Dunbar et al. three-factor tripartite	96.16 (73)	0.036	0.05	0.96	278.57	160.16
Dunbar et al. three-factor hierarchical tripartite	96.27 (73)	0.035	0.05	0.96	278.68	160.27
Razavi single-factor	212.22 (77)	<0.001	0.13	0.77	371.83	268.22
Brandberg et al. three-factor	116.11 (74)	0.001	0.07	0.93	292.83	178.11

The best fit to the data is provided by the three-factor tripartite model and the three-factor hierarchical tripartite model of Clark & Watson (1991) based on Dunbar et al. (2000).

ISSN: 1477-7525