Table 1.

Physical characteristics and distribution of parental socio-economic status of participants

Variable	No. (%)	Mean±SD		t-cal	P-value
		Male (n=185)	Female (n=200)
Age (yr)		13.9±2.0	13.8±1.6	0.021	0.238
Height (m)		1.60±0.1	1.59±0.1	−0.284	0.180
Weight (kg)		40.3±8.4	39.4±3.6	0.064	0.093
Socio-economic status
Low	162 (42.1)
Middle	206 (53.5)
High	17 (4.4)

SD, standard deviation.