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

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

	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)

PA = Physical activity, SB = Sedentary behavior, SD = Standard deviation, CI = Confidence interval.
Only participants within the intervention schools included in the analyses.
*n varies slightly for the different outcomes due to the incomplete data.
^† Adjusted for baseline values.
p¹ = Independent t-test, p² = One-way Ancova.
Sample: Norwegian adolescents 11-13 year-olds from the HEIA study.

ISSN: 1479-5868