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Table 2 Lean mass’ and fat mass’ associations with hip aBMD (g/cm2) given per SD change in body composition, for boys and girls 15–17 years old. The Tromsø Study, Fit Futures 1

From: Bone mineral density at the hip and its relation to fat mass and lean mass in adolescents: the Tromsø Study, Fit Futures

  GIRLS BOYS
Unadjusted Adjusteda Unadjusted Adjusteda
B p R2 (%) B p R2 (%) B p R2 (%) B p R2 (%)
Femoral neck
 BMI 0.036 < 0.001 9.2     0.037 < 0.001 6.4    
 Lean mass 0.054 < 0.001 18.8 0.053 < 0.001 26.8 0.083 < 0.001 30.8 0.072 < 0.001 39.7
 Fat mass 0.028 < 0.001 5.2 0.032 < 0.001 22.7 0.011 0.146 0.6 0.025 < 0.001 31.1
Total hip
 BMI 0.040 < 0.001 11.5     0.038 < 0.001 6.7    
 Lean mass 0.048 < 0.001 15.4 0.057 < 0.001 25.2 0.077 < 0.001 26.6 0.077 < 0.001 39.1
 Fat mass 0.030 < 0.001 5.9 0.036 < 0.001 21.0 0.009 0.228 0.4 0.026 < 0.001 28.9
  1. aAdjusted for age, height, sexual maturity, physical activity, calcium intake, vitamin D levels, alcohol consumption and smoking habits
  2. The regression analyses of lean mass is not adjusted for fat mass, and vice versa