Table 9.
Best fit factorial model for WURSS-21
| CFA Final model structure of the WURSS-21 at day 3 | ||||
| Dimensions 3 restricted | Chi-square | df | χ2/df | CFI |
| 245.7 | 37 | 6.6 | 0.949 | |
| Number of items used = 20 | TLI | RMSEA | WRMR | |
| 0.990 | 0.157 | 1.074 | ||
| Time invariance (configural invariance) Days 2 to 7 | ||||
| Day | CFI | TLI | RMSEA | WRMR |
| 2 | 0.903 | 0.978 | 0.170 | 1.234 |
| 3* | 0.949 | 0.990 | 0.157 | 1.074 |
| 4 | 0.962 | 0.993 | 0.157 | 1.047 |
| 5 | 0.970 | 0.995 | 0.145 | 0.973 |
| 6 | 0.983 | 0.995 | 0.147 | 1.030 |
| 7 | 0.980 | 0.995 | 0.132 | 0.909 |
3* = D ata from day 3 was used for original model
CFI = Comparative Fit Index
TLI = Tuker-Lewis Index
RMSEA = Root Mean Square Error of Approximation
WRMR = Weighted Root Mean Square Residual
Hu and Bentler (1999)[58] suggest the following cut off values for good fit, CFI > .95, TLI > .95, RMSEA < .06, and WRMR < .90