A randomized controlled trial testing a social network intervention to promote physical activity among adolescents

Table 3 Linear mixed-effects model for the standardized physical activity for the imputed dataset

			s²	b	SE	DF	p	95% CI
Random	Participant	Intercept	0.16
	Day	Intercept	0.13
		Residual	0.62
Fixed		Intercept		.75	1.09	411.47	.49	[−1.39, 2.89]
		M. period		−.18	.08	39.243	.033*	[−.34, −.01]
		Condition		−.14	.10	426.30	.151	[−.33, −.05]
		Sex		−.39	.09	223.25	<.001*	[−.56, −.21]
		Age		−.04	.09	456.15	.67	[−.21, .14]
		Athletic competence		.18	.04	455.43	<.001*	[.09, .26]
		M. Period * Condition		.04	.10	85.05	.66	[−.15, .24]

Note. N = 190. CI = Confidence interval. Marginal R² = 0.07. Conditional R² is not applicable for multiple imputed mixed models. *Significant at p < 0.05

ISSN: 1471-2458