Table 1.

Demographic characteristics of samples of different groups

Demographic characteristics	Groups	Obese		Overweight		Normal
		Number	Percent	Number	Percent	Number	Percent
School Grade	Junior high school	13	32.5	12	30	12	30
	second-grade high school	13	32.5	15	37.5	14	35
	third-grade high school	14	35	13	32.5	14	35
Age	15 years	14	35	13	32.5	12	30
	16 years old	13	32.5	13	32.5	14	35
	17 years	11	27.5	14	35	12	30
	18 years	2	5	0	0	2	5