Standardised parameter estimates from latent growth curve models individually testing the effects of each treatment engagement factor on changes in PHQ-9 scores over time
| Treatment engagement factors | Growth factors for PHQ-9 scores | Model fit CFI/SRMR | ||
| Direct effects of intercept on treatment engagement factors | Direct effects of treatment engagement factors on linear slope | Direct effects of treatment engagement factors on quadratic term | ||
| Number of weeks in study | β=0.10 | β=−0.49 | β=0.89 | 1.00/0.16 |
| Number of CPT sessions with repeated content | β=0.12 | β=−0.09 | β=0.19 | 0.97/0.16 |
| Dose of CPT | β=0.07 | β=−0.45 | β=0.87 | 1.00/0.15 |
| Frequency of sessions | β=0.07 | β=−0.11 | β=0.33 | 1.00/0.16 |
| Consistency of sessions | β=0.21 | β=−0.51 | β=0.84 | 1.00/0.17 |
Frequency of sessions was measured as the mean number of days between sessions. Consistency of sessions was measured as the SD of the number of days between sessions.
β, standardised parameter estimates; CFI, comparative fit index; CPT, cognitive processing therapy; PHQ-9, Patient Health Questionnaire 9; SRMR, standardised root mean residual.