Table 1.

Characteristics of children at two study visits in peri-adolescence.

	Male					Female
	n	Mean or %	SD	Min	Max	N	Mean or %	SD	Min	Max	P-valuea
PA VISIT 1
Age (years)	109	10.3	1.6	8.1	14.4	114	10.2	1.7	8.1	14.4	0.34
Waist circumference (cm)	109	69.4	9.7	50.1	95.6	114	70.7	10.2	50.5	101.0	0.39
Skinfold thickness sum (mm)	109	25.0	10.7	9.0	64.0	114	29.8	11.3	11.5	56.5	0.001
BMI-for-age z-score	109	0.9	1.2	−2.9	4.0	114	0.8	1.3	−2.3	3.7	0.61
Puberty initiation
Yes	52	49.1				37	32.5				0.01b
No	54	50.9				77	67.5
PA VISIT 2
Age (years)	109	13.7	1.8	9.9	17.7	114	13.5	1.8	11.0	17.5	0.52
BMI-for-age z-score	108	0.4	1.3	−3.8	3.4	114	0.6	1.2	−2.2	3.2	0.22
Waist circumference (cm)	109	76.4	10.7	59.9	116.5	114	79.6	10.3	58.5	109.2	0.02
Skinfold thickness sum (mm)	109	29.3	14.2	10.5	80	113	39.9	13.9	15.5	78.5	<0.0001
Puberty initiation
Yes	98	92.5				107	95.5				0.34b
No	8	7.5				5	4.5
Maternal education (years)	109	11.2	2.7	3	20	114	10.9	2.8	2	21	0.25

^aT-test for significant difference between boys and girls unless otherwise indicated. Bold values indicates p < 0.05.

^bChi-square test for significant difference between boys and girls.