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Between-group comparison for treatment acceptability.
| Variable | Message (n=46), mean (SD) | Video (n=37), mean (SD) | t test (df) | P value | Cohen d (95% CI) |
| Credibility (10-40) | 26.74 (6.96) | 27.41 (7.23) | –0.34 (44.29) | .74 | –0.09 (–0.64 to 0.45) |
| Working alliance (0-5) | 3.27 (0.98) | 3.42 (0.86) | –0.52 (41.50) | .60 | –0.15 (–0.75 to 0.44) |
| Engagement (0-12) | 8.46 (5.14) | 7.19 (5.46) | 1.08 (75.06) | .28 | 0.24 (–0.20 to 0.67) |
