Gender and grade differences in objectively measured physical activity and sedentary behavior patterns among Japanese children and adolescents: a cross-sectional study

Ishii, Kaori; Shibata, Ai; Adachi, Minoru; Nonoue, Keiko; Oka, Koichiro

doi:10.1186/s12889-015-2607-3

Table 2 Gender-specific physical activity and sedentary behavior levels by school grade

From: Gender and grade differences in objectively measured physical activity and sedentary behavior patterns among Japanese children and adolescents: a cross-sectional study

				Sedentary behavior (minutes/day)		Light physical activiy (minutes/day)		Moderate physical activity (minutes/day)		Vigorous physical activity (minutes/day)		Steps (steps/day)
				Boys	Girls	Boys	Girls	Boys	Girls	Boys	Girls	Boys	Girls
Weekdays
	Preschool	means		326.5	339.6	413.0	402.4	37.2	36.8	41.0	38.8	16552.9	14415.9
	Preschool	95 % CI	lower	309.8	323.3	399.1	389.0	33.7	33.4	36.0	34.0	15479.0	13370.9
			upper	343.3	356.0	426.8	415.9	40.7	40.2	46.0	43.7	17626.8	15460.8
	Lower grades of elementary school	means		372.9	397.5	347.2	338.0	52.7	44.6	44.9	37.6	17757.4	13737.0
	Lower grades of elementary school	95 % CI	lower	353.0	381.0	330.9	324.4	48.6	41.1	39.0	32.7	16489.0	12681.9
			upper	392.7	414.0	363.6	351.6	56.9	48.0	50.8	42.5	19025.8	14792.1
	Higher grades of elementary school	means		411.5	429.5	324.9	310.8	53.2	48.1	28.1	29.4	15540.2	13515.8
	Higher grades of elementary school	95 % CI	lower	397.0	414.9	312.9	298.8	50.2	45.1	23.8	25.0	14612.3	12586.2
			upper	426.0	444.0	336.9	322.8	56.2	51.1	32.4	33.7	16468.0	14445.5
	Junior high school	means		474.8	519.9	286.2	251.8	27.5	26.9	29.2	19.6	12616.3	9199.2
	Junior high school	95 % CI	lower	465.7	510.9	278.7	244.4	25.6	25.0	26.5	16.9	12034.4	8622.5
			upper	483.9	528.9	293.7	259.2	29.4	28.8	32.0	22.3	13198.2	9775.8
Main effects	Gender	F		21.8		14.8		10.1		7.7		70.8
		df		1686		1686		1686		1682		1686
		P value		0.00		0.00		0.00		0.01		0.00
		η2		0.03		0.02		0.01		0.01		0.09
	Grade	F		232.8		216.9		144.5		32.0		67.9
		df		3686		3686		3686		3682		3686
		P value		0.00		0.00		0.00		0.00		0.00
		η2		0.51		0.49		0.39		0.13		0.23
Interaction	Gender × Grade	F		2.9		2.9		2.7		3.4		2.0
		df		3686		3686		3686		3682		3686
		P value		0.04		0.03		0.04		0.02		0.12
		η2		0.01		0.01		0.01		0.01		0.01
Weekends
	Preschool	means		359.0	385.5	396.9	377.1	29.1	29.1	29.0	22.7	12762.5	11151.4
	Preschool	95 % CI	lower	330.1	356.5	372.9	353.0	23.5	23.5	23.2	16.7	11226.3	9609.8
			upper	387.9	414.5	420.9	401.2	34.7	34.7	34.9	28.6	14298.7	12693.0
	Lower grades of elementary school	means		413.3	412.2	325.6	351.8	34.6	28.5	40.5	22.0	14014.2	9995.5
	Lower grades of elementary school	95 % CI	lower	376.5	383.8	295.1	328.2	27.5	23.0	33.1	16.2	12061.0	8485.2
			upper	450.0	440.6	356.1	375.4	41.7	34.0	47.9	27.8	15967.4	11505.8
	Higher grades of elementary school	means		459.6	451.3	303.2	316.0	33.9	26.8	17.3	22.1	9924.6	9238.4
	Higher grades of elementary school	95 % CI	lower	427.3	422.6	276.4	292.1	27.7	21.2	10.8	16.1	8204.3	7711.4
			upper	492.0	480.0	330.1	339.8	40.2	32.4	23.9	28.1	11644.8	10765.4
	Junior high school	means		461.1	520.7	301.7	252.4	34.6	26.0	18.0	17.0	12393.2	8359.6
	Junior high school	95 % CI	lower	438.0	502.5	282.6	237.3	30.1	22.5	13.2	13.1	11165.2	7395.3
			upper	484.2	538.8	320.9	267.4	39.0	29.5	22.9	20.9	13621.2	9324.0
Main effects	Gender	F		3.5		0.8		7.6		6.4		22.6
		df		1427		1427		1426		1405		1427
		P value		0.06		0.37		0.01		0.01		0.00
		η2		0.01		0.00		0.02		0.02		0.05
	Grade	F		29.8		35.4		0.2		8.7		4.4
		df		3427		3427		3426		3405		3427
		P value		0.00		0.00		0.88		0.00		0.00
		η2		0.18		0.20		0.00		0.06		0.03
Interaction	Gender × Grade	F		2.9		4.8		1.0		4.7		2.6
		df		3427		3427		3426		3405		3427
		P value		0.03		0.00		0.38		0.00		0.05
		η2		0.02		0.03		0.01		0.03		0.02

Adjusted for weight status and wear time

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