TABLE 2.
Unadjusted Means and Linear Mixed Effects Model Results for Theoretical Variables: United States, 2011–2016
| Unadjusted Means | Adjusted Differencesa (I − C) | ||||
|---|---|---|---|---|---|
| Baseline | Post-Intervention | ||||
| Variables | M (SD) | M (SD) | Difference | 95% CI | p-value |
| Benefits | .07 | [0, .14] | .066 | ||
| Intervention | 2.35 (0.45) | 2.29 (0.53) | |||
| Control | 2.36 (0.44) | 2.22 (0.51) | |||
| Barriers | .06 | [0, .13] | .041 | ||
| Intervention | 1.23 (0.60) | 1.26 (0.63) | |||
| Control | 1.19 (0.60 | 1.14 (0.60) | |||
| Self-Efficacy | .04 | [−.04, .12] | .320 | ||
| Intervention | 2.17 (0.59) | 2.12 (0.64) | |||
| Control | 2.23 (0.57) | 2.14 (0.60) | |||
| Social Support | .23 | [.11, .35] | <.001 | ||
| Intervention | 1.80 (0.70) | 1.87 (0.82) | |||
| Control | 1.88 (0.72) | 1.73 (0.86) | |||
| Enjoyment | .07 | [−.03, .17] | .163 | ||
| Intervention | 2.25 (0.58) | 2.11 (0.67) | |||
| Control | 2.32 (0.58) | 2.11 (0.72) | |||
| Motivation | .08 | [−.01, .17] | .098 | ||
| Intervention | 3.60 (0.65) | 3.48 (0.68) | |||
| Control | 3.67 (0.61) | 3.48 (0.69) | |||
| MVPA | −.08 | [−.21, .05] | .207 | ||
| Intervention | 3.03 (1.32) | 3.27 (1.49) | |||
| Control | 2.92 (1.29) | 3.27 (1.49) | |||
| MVPA | Post-Intervention | Follow-up | −.03 | [−.14, .08] | .556 |
| Intervention | 3.27 (1.49) | 2.59 (1.19) | |||
| Control | 3.27 (1.49) | 2.64 (1.15) | |||
Note. I = Intervention group; C = Control group; MVPA = moderate to vigorous physical activity; M = Mean; SD = Standard deviation; CI = Confidence interval.
a
Differences between intervention and control group at post-intervention or follow-up for MVPA after adjusting for demographics and random effect of school.