Baseline predictors of dropout in CBT-TF
| Multilevel bivariate model | Multivariate model N (k)=36311 | Parsimonious model N (k)=73022 | ||||||||
| Participant level predictors | n (k) | RR | 95% CI | P value | RR | 95% CI | P value | RR | 95% CI | P value |
| Age (continuous) | 794 (25) | 0.98 | 0.97 to 1.00 | 0.010* | 0.98 | 0.96 to 0.99 | 0.003* | 0.98 | 0.97 to 0.99 | 0.001* |
| Education (years) | 429 (10) | 0.97 | 0.91 to 1.04 | 0.386 | – | – | – | – | – | – |
| Male gender | 822 (28) | 0.95 | 0.66 to 1.37 | 0.778 | 1.10 | 0.66 to 1.83 | 0.726 | – | – | – |
| Marital status (married) | 535 (19) | 1.20 | 0.83 to 1.72 | 0.328 | 1.15 | 0.80 to 1.65 | 0.463 | – | – | – |
| Divorced vs other (single/married/cohabitating) | 548 (19) | 0.85 | 0.56 to 1.29 | 0.439 | – | – | – | – | – | – |
| Using psychotropic medication | 528 (15) | 1.09 | 0.76 to 1.56 | 0.627 | – | – | – | – | – | – |
| PTSD total severity | 793 (27) | 1.04 | 0.91 to 1.20 | 0.539 | 1.03 | 0.86 to 1.23 | 0.769 | – | – | – |
| PTSD intrusion severity | 499 (20) | 1.15 | 0.96 to 1.37 | 0.119 | – | – | – | – | – | – |
| PTSD avoidance severity | 485 (19) | 0.93 | 0.78 to 1.11 | 0.413 | – | – | – | – | – | – |
| PTSD hyperarousal severity | 486 (18) | 0.98 | 0.82 to 1.16 | 0.782 | – | – | – | – | – | – |
| Substance use problem (abuse/dependence) | 434 (12) | 1.01 | 0.59 to 1.73 | 0.962 | ||||||
| Psychiatric comorbidity (anxiety, depression, substance use problem) | 566 (17) | 1.34 | 0.82 to 2.22 | 0.246 | 1.01 | 0.55 to 1.88 | 0.964 | – | – | – |
| Population (military personnel/veterans) | 759 (25) | 1.94 | 1.01 to 3.73 | 0.045* | 1.87 | 1.12 to 3.12 | 0.017* | 2.37 | 1.51 to 3.71 | 0.000* |
*p < 0.05
k, number of included study arms; n, number of participants; PTSD, post-traumatic stress disorder; RR, rate ratio.