Table 3.
Comparison of motivational interviewing (MI) and control group on weight change ratings immediately following interventions
| MI Baseline (N = 69) |
Control Baseline (N = 66) |
MI after Interview 1 (N = 69) |
Control after Interview 1 (N = 66) |
MI after Interview 2 (N = 67) |
Control after Interview 2 (N = 62) |
d after Interview 1 | d after Interview 2 | |
|---|---|---|---|---|---|---|---|---|
| Variable | M (SD) | M (SD) | M (SD) | M (SD) | M (SD) | M (SD) | M (SD) | M (SD) |
| Importance of change | 8.88 (1.25) | 9.00 (1.35) | 8.67 (1.30) | 8.73 (1.60) | 8.52 (1.23) | 8.88 (1.54) | .05 | −.18 |
| Readiness for change | 8.70 (1.34) | 8.80 (1.39) | 8.64 (1.32) | 8.65 (1.22) | 8.70 (1.14) | 8.86 (1.33) | .07 | −.04 |
| Confidence for change | 7.79 (1.76) | 8.14 (1.63) | 7.85 (1.54) | 8.06 (1.38) | 8.25 (1.20) | 8.39 (1.26) | .08 | .12 |
Note. Between-group effect size (Cohen’s d) calculated with mean change scores and pooled standard deviations. (+) effect size favors MI group; (−) effect size favors control group