Table 7. Results of the Confirmatory Factor Analysis (CFA) for the SDM-Q-9 and SDM-Q-Doc: Maximum Likelihood (ML) and Robust statistics.
| df | χ2 | CFI | RMSEA | SRMR | ||||
|---|---|---|---|---|---|---|---|---|
| ML | Robust | ML | Robust | ML | Robust | ML | ||
| SDM-Q-9 | ||||||||
| Model 1 | 27 | 137.4*** | 76.5*** | 0.84 | 0.88 | 0.16 (0.13–0.19) | 0.11 (0.08–0.14) | 0.09 |
| Model 2 | 20 | 77.8*** | 41.9 * | 0.91 | 0.94 | 0.14 (0.10–0.17) | 0.08 (0.05–0.12) | 0.06 |
| Model 3 | 20 | 106.8*** | 55.5*** | 0.88 | 0.91 | 0.17 (0.13–0.20) | 0.11 (0.07–0.14) | 0.09 |
| Model 4 | 14 | 56.2*** | 27.4 * | 0.93 | 0.96 | 0.14 (0.10–0.18) | 0.08 (0.03–0.12) | 0.06 |
| SDM-Q-Doc | ||||||||
| Model 1 | 27 | 74.8*** | 56.9*** | 0.94 | 0.93 | 0.09 (0.07–0.12) | 0.08 (0.05–0.10) | 0.06 |
| Model 2 | 20 | 49.7*** | 35.2 * | 0.96 | 0.96 | 0.09 (0.06–0.12) | 0.06 (0.03–0.09) | 0.05 |
| Model 3 | 20 | 57.9*** | 40.7 ** | 0.95 | 0.95 | 0.10 (0.07–0.13) | 0.07 (0.04–0.10) | 0.05 |
| Model 4 | 14 | 33.9 ** | 21.3 | 0.97 | 0.98 | 0.08 (0.05–0.12) | 0.05 (0.00–0.09) | 0.04 |
Recommended values: CFI (comparative fit index) >0.96, RMSEA (root mean square error of approximation) ≤ 0.06 and SRMR (root mean square residual) ≤0.08. Values meeting cut off criteria are in bold.
* p-value < .05
** p-value < .01
*** p- value < .001.