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Table 3 Comparison of motivational interviewing (MI) and control group on weight change ratings immediately following interventions

From: Behavioral weight-loss treatment plus motivational interviewing versus attention control: lessons learned from a randomized controlled trial

 

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

  1. 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