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Observational Study
Copyright: ©Author(s) 2026.
World J Psychiatry. Oct 19, 2026; 16(10): 121800
Published online Oct 19, 2026. doi: 10.5498/wjp.121800
Table 6 Comparison of alternative model structures
Model structure
χ2 (df)
χ2/df
CFI
RMSEA (90%CI)
AIC
BIC
Conclusion
Parallel mediation model (original)48.32 (24)2.010.960.058 (0.035- 0.080)248.50312.20Good fit; preferred for parsimony
Serial mediation model (PA → SE → sleep → MH)52.17 (23)2.270.940.067 (0.045-0.089)254.30320.10Comparable fit but slightly worse
Single-mediator models (average of three)------Inferior to parallel model (by Δχ2)
Null model (no mediation)156.80 (30)5.230.500.142 (0.120-0.164)--Poor fit


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