Table 1

 Descriptive variables by age and sex

Boys (n = 1042)Girls (n = 1066)Boys (n = 926)Girls (n = 1038)
Values are mean (SD).
BP, Blood pressure.
Age (years)9.7 (0.4)9.6 (0.4)15.5 (0.5)15.5 (0.5)
Weight (kg)33.4 (6.9)32.8 (7.0)61.7 (10.3)55.9 (9.1)
Height (cm)138.4 (6.5)137.6 (6.6)172.7 (7.7)163.7 (6.8)
Body mass index (kg/m2)17.3 (2.6)17.2 (2.7)20.6 (2.8)20.8 (3.1)
Sum of 4 skinfolds (mm)32.1 (17.6)38.1 (18.1)33.6 (16.5)50.3 (18.4)
Waist circumference (cm)60.3 (6.3)58.1 (6.5)72.1 (6.8)67.9 (7.0)
Systolic BP (mm Hg)101.8 (9.3)100.7 (9.0)113.4 (12.0)106.2 (9.2)
Diastolic BP (mm Hg)69.6 (7.3)60.1 (6.9)62.0 (7.0)63.0 (6.7)
Cardiorespiratory fitness (Wmax/kg)3.0 (0.6)2.5 (0.6)3.5 (0.6)2.5 (0.6)