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Table 3 Description of the Underweight subgroups

From: Underweight children are agile but lack power

  Groups p-value
Thinness 1 Thinness 2 Thinness 3
Boys/girls (N) 71/57 15/8 8/10 0.413a
Country: Ghana/South Africa (N) 87/41 18/5 16/2 < 0.001a
Age (years, mean (SD); range) 9.5 (1.7); 5.8–12.9 9.6 (1.8); 6.0–11.9 9.2 (1.6); 6.0–11.8 0.706b
Height (cm, mean (SD); range) 133.7 (10.9); 111–161 137.1 (12.3); 113–163 137.1 (15.5); 119–185 0.268b
Weight (kg, mean (SD); range) 25.33 (4.85); 16.8–38.7 24.80 (4.60); 16.2–34.6 20.57 (6.92); 11.6–41.1 0.001b
1 = 2 > 3
Waist-to-height ratio (mean (SD); range) 0.422 (0.028); 0.37–0.50 0.404 (0.028); 0.36–0.45 0.409 (0.035); 0.36–0.47 0.014b
1 > 2 = 3
BMI (kg/m2, mean (SD); range) 14.03 (0.54); 13.01–15.21 13.08 (0.36); 12.47–13.81 10.74 (1.82); 6.00–12.48 < 0.001b
1 > 2 > 3
Socio-economic area
 Low 56 13 12 0.405a
 Low-middle 59 8 6  
 Middle 8 2 0  
 High 5 0 0  
  1. Legend: a two-tailed Chi-square test; b one-way analysis of variance. Bold values indicate significant differences