. 2018 May 2;2018:3598321. doi: 10.1155/2018/3598321

Table 4.

Significant main effects for correlates of physical activity participation of boys (n=955) and girls (n=926).

Boys	Unstandardized β	p value	Variance explained
Model A			Model-adjusted R² = 0.183
Perceived athletic competence	0.688 (0.054)	0.000	Adjusted R² = 0.170
Motor performance	0.028 (0.008)	0.000	Adjusted R² = 0.006
Body mass index	0.183 (0.062)	0.003	Adjusted R² = 0.007
Model B			Model-adjusted R² = 0.188
Perceived athletic competence	0.679 (0.054)	0.000	Adjusted R² = 0.170
Motor performance	0.027 (0.008)	0.000	Adjusted R² = 0.006
Body mass index	0.188 (0.062)	0.002	Adjusted R² = 0.007
Socioeconomic status	0.0000247 (0.000)	0.008	Adjusted R² = 0.005
Girls			Model-adjusted R² = 0.183
Perceived athletic competence	0.595 (0.046)	0.000	Adjusted R² = 0.175
Motor performance	0.021 (0.007)	0.002	Adjusted R² = 0.008