TABLE 5.
Summary of fit statistics from confirmatory factor analysis of the Pain and Sleep Questionnaire
| Sample | Model description | χ2 | df | P | CFI | TLI | RMSEA | RMSEA 90% CI |
|---|---|---|---|---|---|---|---|---|
| Baseline sample 2 | 6-item solution | 49.94 | 9 | <0.001 | 0.95 | 0.92 | 0.12 | 0.09–0.16 |
| 3-item solution | 0.00 | 0 | <0.001 | 1.00 | 1.00 | 0.00 | 0.00–0.00 | |
| Treatment sample | 6-item solution | 66.22 | 9 | <0.001 | 0.97 | 0.94 | 0.11 | 0.08–0.13 |
| 3-item solution | 0.00 | 0 | <0.001 | 1.00 | 1.00 | 0.00 | 0.00–0.00 |
CFI Comparative fit index; RMSEA Root mean square error of approximation; TLI Tucker-Lewis Index