Table 4.
Effects of treatment measures on 6-month changes in CCBT engagement and clinical outcomes.
| Engagement measure: 6-month change in number of BtB sessions completed | ||||
|---|---|---|---|---|
| Model | Effecta | Estimate (SE) | (95% CI) | P-value |
| (1) | WAI total | 0.45 (0.11) | (0.24, 0.66) | < 0.001 |
| (2) | BTB session total | 0.55 (0.07) | (0.41, 0.70) | < 0.001 |
| (3) | BTB session total | 0.53 (0.08) | (0.36, 0.69) | < 0.001 |
| (3) | WAI total | 0.08 (0.12) | (− 0.16, 0.32) | 0.523 |
| (4) | BTB session total | 0.01 (0.32) | (− 0.61, 0.63) | 0.976 |
| (4) | WAI total | − 0.32 (0.27) | (− 0.85, 0.20) | 0.224 |
| (4) | BTB * WAI interaction | 0.11 (0.06) | (− 0.02, 0.24) | 0.090 |
| (5) | Overall treatment satisfaction | 0.36 (0.08) | (0.20, 0.53) | < 0.001 |
| Outcome: 6-month change in SF-12 MCS | ||||
| (1) | WAI total | 2.22 (0.54) | (1.15, 3.28) | < 0.001 |
| (2) | BTB session total | 1.69 (0.37) | (0.96, 2.42) | < 0.001 |
| (3) | BTB session total | 1.14 (0.43) | (0.31, 1.98) | 0.007 |
| (3) | WAI total | 1.64 (0.63) | (0.40, 2.87) | 0.009 |
| (4) | BTB session total | 0.46 (1.61) | (− 2.70, 3.62) | 0.776 |
| (4) | WAI total | 1.09 (1.37) | (− 1.60, 3.79) | 0.427 |
| (4) | BTB * WAI interaction | 0.15 (0.33) | (− 0.50, 0.79) | 0.659 |
| (5) | Overall treatment satisfaction | 1.84 (0.42) | (1.02, 2.66) | < 0.001 |
| Outcome: 6-month change in PROMIS depression | ||||
| (1) | WAI Total | − 2.08 (0.38) | (− 2.81, − 1.34) | < 0.001 |
| (2) | BTB session total | − 1.49 (0.26) | (− 2.00, − 0.98) | < 0.001 |
| (3) | BTB session total | − 0.99 (0.30) | (− 1.57, − 0.41) | 0.001 |
| (3) | WAI total | − 1.49 (0.44) | (− 2.35, − 0.64) | 0.001 |
| (4) | BTB session total | 0.02 (1.11) | (− 2.17, 2.20) | 0.987 |
| (4) | WAI total | − 0.71 (0.95) | (− 2.57, 1.16) | 0.459 |
| (4) | BTB * WAI interaction | − 0.21 (0.23) | (− 0.66, 0.23) | 0.350 |
| (5) | Overall Treatment Satisfaction | − 1.53 (0.29) | (− 2.10, − 0.95) | < 0.001 |
| Outcome: 6-month change in PROMIS anxiety | ||||
| (1) | WAI total | − 2.22 (0.41) | (− 3.02, − 1.42) | < 0.001 |
| (2) | BTB session total | − 1.28 (0.28) | (− 1.83, − 0.72) | < 0.001 |
| (3) | BTB session total | − 0.65 (0.32) | (− 1.28, − 0.02) | 0.043 |
| (3) | WAI total | − 1.86 (0.47) | (− 2.79, − 0.93) | < 0.001 |
| (4) | BTB session total | − 0.34 (1.21) | (− 2.72, 2.04) | 0.781 |
| (4) | WAI Total | − 1.61 (1.04) | (− 3.65, 0.42) | 0.120 |
| (4) | BTB * WAI interaction | − 0.07 (0.25) | (− 0.55, 0.42) | 0.789 |
| (5) | Overall treatment satisfaction | − 1.60 (0.32) | (− 2.21, − 0.98) | < 0.001 |
Abbreviations: BtB, Beating the Blues; PROMIS Anxiety, Patient-Reported Outcomes Measurement Information System for Anxiety (fixed length, short form); PROMIS Depression, Patient-Reported Outcomes Measurement Information System for Depression (fixed length, short form); SF-12 MCS, Medical Outcomes Study Short Form Mental Component Scale; WAI, Working Alliance Inventory.
a
All estimates are derived from 6-month contrasts in the interaction between the listed Effect and Time.