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Table 2 Factor structure of the Hospital Anxiety and Depression Scale as determined by testing the fit of models derived from factor analysis

From: Cardiac vagal control and theoretical models of co-occurring depression and anxiety: A cross-sectional psychophysiological study of community elderly

Models

WLS X 2(d.f.)

RMSEA

CFI

CAIC

AIC

ECVI

Unitary factor model of Razavi et al.(1990)

369.37 (77)

0.10

0.86

561.71

425.37

1.21

Two-factor model of Zigmond and Snaith (1983)

297.08 (76)

0.09

0.89

496.29

355.08

1.00

Tripartite model of Dunbar et al.(2000)

      

Flat tripartite model

283.05 (74)

0.09

0.90

496.00

345.05

0.98

Hierarchical tripartite model

295.68 (75)

0.09

0.89

501.76

355.68

1.01

  1. Bold indicates best model fit as a function of model fit index criteria. Abbreviations: Weighted least-square (WLS), Root mean squared error of approximation (RMSEA), Comparative fit index(CFI), Consistent Akaike information criterion (CAIC), Akaike information criterion (AIC) and expected cross validation index (ECVI).