Table 1.

Descriptive Analyses of Moderate-to-Vigorous Physical Activity, Sedentary Behavior, and Body Mass Index by Gender

	Wave-I			Wave-II			Wave-III			Wave-IV
	N	Mean	SD	N	Mean	SD	N	Mean	SD	N	Mean	SD
MVPA
All	254	43.63	18.87	242	45.23	19.71	186	35.87	19.72	138	29.23	14.86
boy	123	48.67	20.55	115	48.59	19.80	91	38.75	21.02	62	32.80	16.43
girl	131	38.90	15.82	127	42.18	19.20	95	33.11	18.08	76	26.31	12.83
Sedentary
All	253	386.81	79.32	242	414.64	100.43	186	490.38	78.68	138	444.00	114.37
boy	122	373.56	78.69	116	402.71	109.32	91	486.02	78.38	62	437.77	125.25
girl	131	399.15	78.19	126	425.61	90.53	95	494.55	79.15	76	449.08	105.25
BMI
All	261	18.22	3.71	249	18.62	3.89	198	19.24	4.37	131	19.95	4.57
boy	126	18.26	3.90	120	18.64	4.11	96	19.40	4.44	59	21.11	5.18
girl	135	18.18	3.53	129	18.60	3.69	102	19.08	4.33	72	18.99	3.77

Unit for MVPA and sedentary behavior is minutes/day; unit for BMI is the value of weight (kg)/[height (m)].

MVPA, moderate-to-vigorous physical activity; BMI, body mass index.