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Observational Study
Copyright: ©Author(s) 2026.
World J Psychiatry. Oct 19, 2026; 16(10): 122230
Published online Oct 19, 2026. doi: 10.5498/wjp.122230
Table 3 Comparison of model fit indices between unconstrained and constrained (nested) models
Fit index
Unconstrained model
Constrained (nested) model1
Acceptable fit range
χ2 (df)50.83 (17)158.41 (23)-
χ2/df2.996.89< 3
CFI0.980.91> 0.90
IFI0.980.91> 0.90
NFI0.970.90> 0.90
RMSEA0.070.12< 0.08
Δχ2 (Δdf)-107.58 (6)-


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