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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