Table 4.
Fit indexes of the invariance of the HADS across the subgroups
| Chi-squared(df) | RMSEA | CFI | TLI | AIC | |
| Outpatients vs. students | |||||
| Model A | 508.444 (162) | .038 | .938 | .930 | 604.444 |
| Model B | 515.996 (168) | .037 | .938 | .932 | 599.996 |
| Model C | 519.269 (169) | .037 | .937 | .932 | 601.269 |
| Men vs. women | |||||
| Model A | 498.638 (162) | .038 | .943 | .936 | 594.638 |
| Model B | 511.829 (178) | .036 | .943 | .942 | 575.829 |
| Model C | 511.852 (179) | .036 | .944 | .943 | 573.852 |
Model A is factor pattern invariance; Model B is factor loading invariance; Model C is strong factorial invariance. All chi-squared statistics were significant at P < 0.001.