Table 1.

Baseline characteristics of participants^†

Variable	Intervention‡		Control‡
	Boys (n=176)	Girls (n=170)	Boys (n=177)	Girls (n=159)
Age, mean±SD, years	12.7±0.5	12.6±0.5	12.8±0.5	12.6±0.4
Weight status, %
Normal weight	51.1	76.5	64.4*	76.7
Overweight	34.1	17.6	25.4	15.7
Obesity	14.8	5.9	10.2	7.5
BMI, kg/m2	21.7±4.6	20.2±3.8	20.6±4.2*	19.9±4.6

^*p<0.05 in boys between intervention and control group by gender.

^†p Values were adjusted for cluster effect in matched pair, school and class.

^‡Unadjusted values.