Table 1.

Characteristics of Study Participants

Indicators		Boys (n = 782)	Girls (n = 690)
Age (Mean ± SD)		11.72 ± 2.09	11.02 ± 2.66
School
	Urban school	421	333
	Village school	361	357
Grade
	Grade two	-	203
	Grade three	109	102
	Grade four	225	-
	Grade seven	221	181
	Grade eight	227	204
Anthropometric
	Height (cm)	147.57 ± 13.84	142.37 ± 14.59
	Weight(kg)	41.81 ± 13.70	38.12 ± 13.72
	Triceps skinfold (mm)	6.60 ± 3.04	7.54 ± 3.29
	Subscapular skinfold (mm)	5.03 ± 3.22	5.86 ± 2.70
	Suprailiac skinfold (mm)	5.14 ± 3.28	7.72 ± 3.74
Body compositions
	BD(kg/L)	1.07 ± 0.01	1.06 ± 0.01
	%BF	12.51 ± 3.35	15.43 ± 4.44
	FM(kg)	5.49 ± 3.12	5.66 ± 3.40
	FFM(kg)	36.47 ± 11.13	32.74 ± 11.07

BD: body density, %BF: percentage of body fat, FM: fat mass, FFM: fat-free mass, BMI: body mass index