Factor structure of the Hospital Anxiety and Depression Scale in Japanese psychiatric outpatient and student populations

Table 3 Fit indexes of the current and proposed models in Group 2

Model	N. of factor	Chi-squared (d.f.)	RMSEA	CFI	TLI	AIC
Razavi et al. (1990)	1	241.832 (77)	.108	.864	.839	297.832
Zigmond et al. (1983)	2^a	261.998 (77)	.115	.847	.819	317.998
Moorey et al. (1991)	2^b	231.387 (76)	.053	.949	.939	289.387
Current study	2	187.445 (74)	.046	.963	.955	249.445
Dunbar et al. (2000)	3	211.682 (72)	.051	.955	.943	277.682
Caci et al. (2003)	3^c	578.375 (74)	.096	.837	.799	640.375
Leung et al. (1993)	3	218.079 (74)	.051	.953	.943	280.079
Friedman et al. (2001)	3^d	240.598 (74)	.055	.946	.934	302.598

All chi-squared statistics were significant at P < 0.001. ^aOriginal two factors. ^bTwo factors were correlated. ^cThree factors consisting of all 14 items. ^dThree factors were correlated.

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