Table 2.
Effect Sizes of Included Studies, Grouped by Study Type (Obesity Treatment vs. Obesity Prevention)
| Author, Year | Measure | Outcome Studied | Study Result: Interventions vs Control* |
|---|---|---|---|
|
Obesity Treatment Studies
| |||
| Bonsergent 2012 | Mean change at 24 months | BMI | 0.64 (1.44) vs. 0.72 (1.49)** |
| BMIz | −0.09 (0.44) vs −0.05 (0.43)** | ||
| Melin 2009 | Mean change at 12 months | BMI | 1.9 (1.7) vs. 2.1 (1.5) |
| BMIz | −0.05 (0.5) vs. 0.04 (0.3)** | ||
| Pbert 2012 | Mean change at 2 months | BMI | 0.01 (1.64) vs. 0.14 (1.14) |
| BMIz | 0.00 (0.17) vs. 0.01 (0.11) | ||
| Mean change at 6 months | BMI | −0.01 (1.98) vs. 0.26 (1.59) | |
| BMIz | 0.00 (0.21) vs. 0.01 (0.17) | ||
| Mean difference in change at 2 months, adjusted for demographic and behavioral confounders | BMI | −0.09 (3.40) | |
| BMIz | −0.01 (0.37) | ||
| Mean difference in change at 6 months, adjusted as per 2 months | BMI | −0.22 (4.62) | |
| BMIz | −0.02 (0.47) | ||
| Wong 2013 | Mean change at 3.5 months | BMI | A: −0.67 (1.01) vs 0.81 (0.92)** |
| B: −1.17 (0.99) vs 0.81 (0.92)** | |||
|
| |||
|
Obesity Prevention Studies
| |||
| Hawthorne 2011 | Mean change at 4 months | BMI percentile | Not reported |
| Johnston 2013 | Mean change at 12 months | BMI | 0.8 (1.3) vs. 0.78 (1.4) |
| BMIz | −0.07 (0.24) vs. −0.05 (0.25) | ||
| Mean change at 24 months | BMI | 1.67 (1.67) vs. 1.92 (1.91) | |
| BMIz | −0.08 (0.27) vs. −0.02 (0.27)** | ||
| Robbins 2012 | Mean change at 6 months | BMI | 0.41 (1.02) vs. 0.74 (0.73) |
| BMIz | 0.06 (0.18) vs. 0.12 (0.18) | ||
| BMI percentile | 1.94 (4.59) vs. 3.05 (5.68) | ||
| Linear regression models, adjusted for baseline measures | BMI | −0.33 (0.22) | |
| BMIz | −0.04 (0.04) | ||
| BMI percentile | −0.57 (0.97) | ||
| Speroni 2007 | Mean change at 6 months | BMI percentile | −2.3 (p 0.01) vs. (p 0.01)** |
| Tucker 2015 | Mean change at 3 months | BMI percentile | −0.6 |
| Mean change at 7 months | −2.3 | ||
| Williams 2011 | Mean change at 3 months | BMI percentile | −2.57 vs. 1.07 |
| Wright 2013 | Mean change at 12 months, adjusted for baseline scores, race and parent marital status | BMI | Boys: −2.56 (10.68) vs. 1.35 (31.79) |
| Girls: −3.65 (14.06) vs. 1.23 (26.28) | |||
| BMIz | Boys: −0.19 (4.85) vs. 0.79 (13.16) | ||
| Girls: −0.70 (2.09) vs. 0.58 (11.90)** | |||
*
Results are unadjusted unless otherwise indicated. Results from unadjusted analyses used to calculate effect size.
**
Statistically significant at p < .05