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Table 2 Characteristics (mean and SD) for all subjects, stratified by gender

From: Objectively determined habitual physical activity in South African adolescents: the PAHL study

  All All
  Boys Girls Black White
  Mean ± SD Mean ± SD Mean ± SD Mean ± SD
Age 15.8 ± 0.7 15.7 ± 0.9 15.8 ± 0.9 15.7 ± 0.5
Stature (cm) 169 ± 0.1a 158 ± 0.1a 160.1 ± 0.1b 171.2 ± 0.1b
Body Mass (kg) 61.4 ± 15.1a 57.6 ± 13.2a 55.3 ± 11.0b 69.9 ± 16.3b
BMI (kg/m2) 21.1 ± 4.2a 22.9 ± 4.9a 21.7 ± 4.5b 23.8 ± 5.2b
%Body Fat 9.3 ± 3.7a 15.5 ± 5.0a 13.1 ± 5.6 12.9 ± 5.0
Fat Mass (kg) 6.1 ± 4.6a 9.4 ± 5.4a 7.6 ± 5.0b 9.4 ± 5.9b
Fat Free Mass (kg) 54.9 ± 11.6a 48.2 ± 8.9a 47.6 ± 7.8b 60.3 ± 11.9b
  Boys Girls
  Black White Black White
  Mean ± SD Mean ± SD Mean ± SD Mean ± SD
Age 15.84 ± 0.8 15.65 ± 0.1 15.7 ± 0.5 15.7 ± 0.5
Stature (cm) 166.1 ± 0.1 177.2 ± 0.1 157.2 ± 0.1 165.1 ± 0.1
Body Mass (kg) 54.5 ± 8.7 74.2 ± 16.2 55.8 ± 12.1 64.9 ± 15.2
BMI (kg/m2) 19.8 ± 0.8 23.7 ± 5.0 22.7 ± 4.8 24.0 ± 5.6
%Body Fat 8.5 ± 2.3 10.8 ± 5.1 15.5 ± 5.4 15.5 ± 3.5
Fat Mass (kg) 4.7 ± 1.9 8.7 ± 6.6 9.1 ± 5.4 10.4 ± 4.9
Fat Free Mass (kg) 49.4 ± 7.5 65.5 ± 10.6 46.7 ± 7.8 54.5 ± 10.6
White     
  1. RMR = resting metabolic rate; n = number; %BF = percentage body fat; ± = standard deviation. Values represented as means ± standard deviation. Comparisons between gender and race groups were completed using independent t-tests when data was normally distributed and Mann-Whitney U-test for non-normally distributed data.
  2. a p < 0.05 Girls vs Boys.
  3. b p < 0.05 Black vs White.