Table 1

 Mean and 95% confidence intervals of height, body mass index, waist circumference, Vo2max (ml/kg/min)

Age (years)Height (cm)BMIBMI (z score)Waist (cm)Vo2max (ml/kg/min)
Boys
7–8 (n = 37)132.9 (131.1 to 34.7)16.2 (15.3 to 17.1)–0.013 (–0.48 to 0.46)61 (58.7 to 63.3)51.7 (50.2 to 53.2)
8.1–9 (n = 37)135.2 (133.9 to 136.5)16.8 (16.0 to 17.6)0.307 (–0.07 to 0.69)62 (60.1 to 63.9)55.0 (53.6 to 56.5)
9.1–10 (n = 10)139.3 (135.1 to 143.5)19.4 (17.8 21.5)1.175 (0.39 to 2.0070 (62.5 to 77.4)51.7 (47.9 to 55.5)
Total (n = 84)134.7 (133.5 to 135.9)16.9 (16.3 to 17.5)0.269 (–0.02 to 0.56)62 (60.3 63.7)64.3 (53.2 to 75.4)
Girls
7–8 (n = 49)131.6 (130.3 to 132.9)16.6 (13.0 to 20.2)0.133 (–0.22 to 0.48)62 (60.0 to 64.0)50.5 (49.5 to 51.5)
8.1–9 (n = 81)133.3 (132.2 to 134.4)16.6 (16.1 to 17.1)0.047 (–0.18 to 0.28)62 (60.5 to 63.5)48.9 (48.2 to 49.6)
9.1–10 (n = 10)136.2 (130.6 to 141.817.8 (15.8 to 19.8)0.346 (–0.77 to 1.46)66 (59.8 to 72.249.8 (47.0 to 52.6)
Total (n = 140)132.9 (132.0 133.8)16.7 (16.3 to 17.1)0.10 (–0.09 to 0.29)62 (60.8 to 63.2)49.5 (48.9 to 50.1)
Significancep = 0.023p = 0.59p = 0.31p = 0.78p<0.001