Table 2.
CFA fit indices for three alternative models of the SCI-SC (N = 343)
| Model | χ2 (df) | P | CFI | TLI | RMSEA (90% CI) | SRMR |
|---|---|---|---|---|---|---|
| Baseline | ||||||
| One-factor | 192.989 (20) | < 0.001 | 0.825 | 0.755 | 0.156 (0.133, 0.180) | 0.095 |
| Two-factor | 34.282 (19) | 0.017 | 0.989 | 0.984 | 0.040 (0.000, 0.071) | 0.039 |
| Second-order factor | 43.975 (20) | 0.002 | 0.980 | 0.972 | 0.053 (0.021, 0.081) | 0.068 |
| Follow-up | ||||||
| One-factor | 251.394 (20) | < 0.001 | 0.807 | 0.730 | 0.181 (0.157, 0.205) | 0.106 |
| Two-factor | 79.337 (19) | < 0.001 | 0.953 | 0.931 | 0.092 (0.066, 0.118) | 0.054 |
| Second-order factor | 93.785 (20) | < 0.001 | 0.941 | 0.918 | 0.100 (0.075, 0.125) | 0.090 |
| Threshold | N/A | > 0.050 | ≥ 0.900 | ≥ 0.900 | ≤ 0.100 | ≤ 0.080 |
Abbreviations: CFA confirmatory factor analysis, SCI Sleep Condition Indicator, SC simplified Chinese, χ2 chi-square, df degrees of freedom, CFI comparative fit index, TLI Tucker–Lewis index, RMSEA root mean square error of approximation, CI confidence interval, SRMR standardized root mean square residual, N/A, not applicable