Table 2

Anthropometric and socio-demographic data of the excluded and remaining participants in the ACARFS study
Excluded Participants (n29) Remaining participants
Total (n 691) Year 4 (n 354) Year 6 (n 337)
School Year 4 (%) 58.6* 51.2*
Female (%) 65.5* 56.2* 56.2 56.1
Age (years) -mean ± SD 10.8 (±1.1) 11.0 (±1.1) 10.0 (±0.4) 12.1 (±0.4)
Height (cm) -mean ± SD 146.8 (±7.7) 145.7 (±9.4) 139.4 (±6.7) 152.4 (±6.9)
Weight (kg) -mean ± SD 40.9 (±7.4) 41.0 (±10.8) 35.9 (±8.3) 46.3 (±10.6)
BMI (kg/m2) -mean ± SD 18.9 (±2.6) 19.1 (±3.5) 18.4 (±3.2) 19.8 (±3.5)
BMI z-score -mean 0.73 (±1.1) 0.67 (±1.2) 0.63 (±1.2) 0.72 (±1.1)
Overweight (%)a 20.7 22.3† 21.2 23.4
Obese (%)a 6.9 5.8 6.5 5.1

cm, centimetres; m, meters; SD, standard deviation. a Healthy weight, overweight or obese classified using the UK age and gender-specific BMI z-score cut-off points that correspond to a BMI of 25 for overweight and 30 for obese at 18 years of age. * P-values for the comparison of excluded participants and remaining participants using the students t-test (two-tailed) were not significant (P > 0.05). †P-values for the comparison of excluded participants and remaining participants using the Wilcoxon test (two-tailed) were not significant (P > 0.05).

Marshall et al.

Marshall et al. Nutrition Journal 2012 11:96   doi:10.1186/1475-2891-11-96

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