Table 2. Association of dichotomized participation variables with education-related outcomes: odds ratios and 95% confidence intervals for active vs. inactive adolescents (reference category).

	High school engagement	Low school-related stress	Above-average academic achievement	School support outside family
	(a lot/a bit)	(not at all/little)	(good/very good)	(peer and/or adult)
Model 1 (univariable)
≥1 activity vs. inactive	1.61 (1.45–1.79)**	1.25 (1.13–1.39)**	1.81 (1.64–2.00)**	1.29 (1.09–1.53)*
Model 2 (adjusted for age and gender)
≥1 activity vs. inactive	1.55 (1.39–1.72)**	1.20 (1.08–1.36)*	1.81 (1.64–2.00)**	1.38 (1.16–1.65)**

* p < 0.01,

** p < 0.001;

the item on school support outside family was present only in one questionnaire version for 13-year-olds and one version for 15-year-olds (n = 3,374).