Table 4.
Treatment Fidelity Assessment
| MI sessions (N=265) | Education control sessions (N=256) | P value | |
|---|---|---|---|
| MITI global rating+ (range 5–25), mean (SD) | 22.02 (2.83) | 13.67 (2.79) | <0.001 |
| MITI competence summary† | |||
| Global spirit | 206 (78%) | 28 (11%) | < 0.001 |
| Global empathy | 225 (86%) | 59 (23%) | < 0.001 |
| Global direction | 193 (73%) | 216 (84%) | 0.002 |
| Reflection/Question ratio | 111 (42%) | 32 (13%) | < 0.001 |
| Percent open question | 104 (40%) | 36 (14%) | < 0.001 |
| Percent complex reflection | 196 (76%) | 75 (30%) | < 0.001 |
| Percent MI adherent | 206 (80%) | 50 (20%) | < 0.001 |
*
MITI global rating is a 5-item scale that covers empathy, direction, collaboration, evocation and autonomy/support.
†
Proportion of recorded sessions with solid MI competence rating. N= number of recorded sessions. MITI: Motivational Interviewing Treatment Integrity. P-values are from nested ANOVA (sessions within therapist) for continuous variable or from logistic regression analyses (multinomial/polytomous) for categorical data.