Table 5 Fit indices for confirmatory factor analyses of factor structures proposed in previous studies
RMSEA | |||||||
|---|---|---|---|---|---|---|---|
Models | Number of factors | Sub scale content | RMSEA | 90% CI | p-value | CFI | TLI |
Zigmond and Snaith 1983 [5] | 2 | HADS-A: 1,3,5,7,9,11,13 HADS-D: 2,4,6,8,10,12,14 | 0.071 | 0.069;0.072 | < 0.001 | 0.973 | 0.968 |
Dunbar et al. 2000 [43] | 3 | Negative affect: 1,5,7,11 Autonomic anxiety: 3,9,13 Depression: 2,4,6,8,10,12,14 | 0.061 | 0.059;0.062 | < 0.001 | 0.981 | 0.976 |
Friedman et al. 2001 [44] | 3 | Psychomotor agitation: 1,7,11 Psychic anxiety: 3,5,9,13 Depression: 2,4,6,8,10,12,14 | 0.060 | 0.058;0.061 | < 0.001 | 0.981 | 0.977 |
Caci et al. 2003 [42] | 3 | Anxiety: 1,3,5,9,13 Depression: 2,4,6,8,10,12 Restlessness: 7,11,14 | 0.064 | 0.062;0.065 | < 0.001 | 0.979 | 0.974 |
Kaur et al. 2015 [15] | 3 | Anxiety: 1,3,5,7,9,11,13 Anhedonia: 2,4,6,14 Psychomotor retardation: 8,10,12 | 0.069 | 0.068;0.071 | < 0.001 | 0.975 | 0.969 |
Cosco et al. 2012 [21] | 1 | 1,2,3,4,5,6,7,9,10,11,12,13 | 0.111 | 0.109;0.113 | < 0.001 | 0.945 | 0.932 |