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Table 3 Comparison of physical characteristics with statistical data for sex- and age-related differences analyzed by two-way ANOVA

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

  Boys Girls Difference
3–4-year-old 5–6-year-old 3–4-year-old 5–6-year-old Sex Age Sex*Age
Mean SD Mean SD Mean SD Mean SD F p F p F p
n 24 45 20 51       
Age, month 51.4 6.6 70.3 6.6 48.5 7.7 71.5 6.1 0.5 0.492 304.4  < 0.001* 2.9 0.091
Height, cm 100.6 6.0 111.9 5.7 97.9 6.0 112.4 4.9 1.2 0.267 163.2  < 0.001* 2.5 0.115
Weight, kg 15.6 2.5 19.8 3.8 15.0 2.1 19.6 2.7 0.6 0.449 64.2  < 0.001* 0.2 0.691
Body mass index, kg/m2 15.4 15.7 15.7 1.8 15.6 1.0 15.5 1.3 0.0 0.996 0.1 0.703 0.7 0.394
Fat-free mass, kg 12.5 2.0 16.0 2.3 11.0 1.4 15.1 1.9 10.7 0.001* 110.1  < 0.001* 0.7 0.405
Fat mass, kg 3.2 0.9 3.8 2.0 4.0 1.0 4.5 1.4 8.0 0.005* 4.2 0.043* 0.1 0.754
% Fat mass, % 20.2 4.2 18.6 5.6 26.5 4.0 22.6 5.0 33.0  < 0.001* 9.2 0.003* 1.6 0.204
Fat-free mass index, kg/m2 12.3 1.2 12.7 1.0 11.4 0.6 11.9 0.8 22.6  < 0.001* 7.9 0.006* 0.0 0.927
Fat mass index, kg/m2 3.1 0.8 3.0 1.3 4.2 0.8 3.5 1.0 18.1  < 0.001* 3.9 0.500 1.8 0.185
  1. *Statistically different