Table 3.
Model comparison among the unconstraint and nested models.
| Models | χ2 (df) | p-value# | NFI | CFI | TLI | SRMR | RMSEA | Δχ2 | Δdf | p-value## |
|---|---|---|---|---|---|---|---|---|---|---|
| Unconstraint | 0.833 (1) | 0.369 | 0.999 | 1.000 | 1.019 | 0.010 | < 0.001 | |||
| Equality constraint on sleep problems from MEQ | 13.230 (7) | 0.099 | 0.979 | 0.989 | 0.896 | 0.042 | 0.067 | 12.397 | 6 | 0.054 |
| Equality constraint on resilience from sleep problems | 5.064 (7) | 0.636 | 0.992 | 1.000 | 1.032 | 0.019 | < 0.001 | 4.232 | 6 | 0.645 |
CFI, Comparative fit index; df, degree of freedom; MEQ, Morningness–Eveningness Questionnaire; NFI, Normed fit index; RMSEA, Root-mean-square error of approximation; SRMR, Standardized root mean squared residual; TLI, Tucker–Lewis index. #p-values were obtained from Chi-square statistics (χ2) using Bollen-Stine bootstrapping method (5000 times). ##p-values were obtained from Chi-square difference tests compared with the freely estimated model. The effect of age was controlled in both the unconstraint and nested models. The final model was bold.