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Table 1 Comparison of physical characteristics with statistical data for sex differences analyzed by t-test

From: Determining total energy expenditure in 3–6-year-old Japanese pre-school children using the doubly labeled water method

  Boys Girls Sex
Mean SD Mean SD p
n 69 71  
Age, months 63.7 11.2 65.0 12.3 0.509
Height, cm 108.0 7.9 108.3 8.3 0.816
Weight, kg 18.4 3.9 18.3 3.3 0.942
Body mass index, kg/m2 15.6 1.7 15.5 1.2 0.748
Fat-free mass, kg 14.8 2.8 14.0 2.6 0.069
Fat mass, kg 3.6 1.7 4.4 1.3 0.003*
% Fat mass, % 19.1 5.2 23.7 5.1  < 0.001*
Fat-free mass index, kg/m2 12.6 1.1 11.8 0.8  < 0.001*
Fat mass index, kg/m2 3.0 1.1 3.7 1.0  < 0.001*
  1. *Statistically different