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Table 6 Influence of intervention dose received on the determinant for PA and SB

From: Mid-way and post-intervention effects on potential determinants of physical activity and sedentary behavior, results of the HEIA study - a multi-component school-based randomized trial

  Intervention dose received Crude Mean (SD) Baseline p1 Adjusted Mean 95% CI p2
Mid-way (low n = 219, high n = 273)*       
Enjoyment Low 4.03 (0.82) .12 4.03 (3.94, 4.12) .001
  High 4.13 (0.72)   4.22 (4.15, 4.30)  
Self-efficacy Low 3.72 (0.85) .001 3.91 (3.83, 4.00) .005
  High 3.97 (0.72)   4.07 (4.00, 4.15)  
Perceived social support from parents Low 2.30 (0.75) .65 2.39 (2.30, 2.48) .27
  High 2.43 (0.77)   2.46 (2.38, 2.54)  
Perceived social support from teachers Low 1.66 (0.71) .02 1.62 (1.53, 1.71) <.001
  High 1.82 (0.89)   1.86 (1.78, 1.94)  
Post-intervention (low n = 347, high n = 156)*       
Enjoyment Low 4.03 (0.79) .01 3.82 (3.74, 3.91) .01
  High 4.22 (0.67)   4.02 (3.89, 4.15)  
Self-efficacy Low 3.79 (0.82) .001 3.72 (3.63, 3.80) .07
  High 4.01 (0.66)   3.86 (3.73, 3.99)  
Social support from parents Low 2.33 (0.77) .05 2.21 (2.13, 2.29) .06
  High 2.48 (0.74)   2.34 (2.23, 2.46) .
Social support from teachers Low 1.72 (0.80) .09 1.57 (1.49, 1.64) .07
  High 1.86 (0.89)   1.69 (1.58, 1.80)  
Social support from friends Low 2.92 (1.05) .18 2.75 (2.66, 2.85) .02
  High 3.05 (0.98)   2.96 (2.82, 3.11)  
Perceived environmental opportunities Low 4.20 (0.76) .002 4.15 (4.06, 4.24) .02
  High 4.43 (0.71)   4.35 (4.22, 4.48)  
Parental regulation TV-viewing Low 3.68 (0.92) .88 3.33 (3.23, 3.43) .07
  High 3.69 (0.92)   3.50 (3.35, 3.66)  
Parental regulation computer/game-use Low 3.51 (0.99) .5 3.27 (3.15, 3.38) .41
  High 3.58 (1.04)   3.35 (3.19, 3.52)  
Social inclusion at school Low 4.35 (0.63) .08 4.26 (4.18, 4.34) .009
  High 4.46 (0.56)   4.45 (4.33, 4.57)  
  1. PA = Physical activity, SB = Sedentary behavior, SD = Standard deviation, CI = Confidence interval.
  2. Only participants within the intervention schools included in the analyses.
  3. *n varies slightly for the different outcomes due to the incomplete data.
  4. Adjusted for baseline values.
  5. p1 = Independent t-test, p2 = One-way Ancova.
  6. Sample: Norwegian adolescents 11-13 year-olds from the HEIA study.