Table 4. Differences in Percentage of Time Spent in MVPA During School, PE, and Afterschool PA Program by Demographic Characteristics*.

		During school hours (450 mins/day)	During PE (45 mins/day)	During afterschool PA program (40 mins/day)
		Sex	Boys	10.5 (0.7)	37.4 (1.5)	60.9 (1.8)
Girls	8.0 (0.5)		25.8 (1.2)	51.6 (1.4)
P-value †	.002		<.001	<.001
Grade	3rd	7.9 (0.8)	27.1 (2.2)	56.9 (2.1)
	4th	10.2 (0.6)	32.8 (1.7)	57.5 (1.6)
	5th	9.6 (0.7)	34.8 (2.2)	54.5 (2.1)
	P-value†	.061 (3rd vs 4th) #	.020 (3rd vs 5th) #	.455
Race/ethnicity	Black	10.2 (0.5)	35.16 (1.52)	53.0 (1.4)
	Hispanic	7.9 (0.7)	29.48 (1.80)	56.2 (1.7)
	Others	9.6 (1.1)	30.09 (3.09)	59.7 (2.9)
	P-value †	.031 (Black vs Hispanic) #	.045 (Black vs Hispanic) #	.092
BMI‡ (n, %)	<85th pct	9.1 (0.6)	31.7 (1.5)	57.2 (1.5)
	≥85th pct	9.4 (0.6)	31.5 (1.9)	55.4 (1.8)
	P-value †	.697	.927	.398

PA = physical activity; PE = physical education; MVPA = moderate and vigorous intensity physical activity*values are the average % of time spent in MVPA estimated from the general linear mixed model adjusting for other variables† P-values were estimated from the omnibus F-test in the general linear mixed model‡BMI for age and sex percentile#Tukey’s adjustment was used for pairwise comparisons.