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. Author manuscript; available in PMC: 2015 Apr 29.
Published in final edited form as: J Bone Miner Res. 2011 Sep;26(9):2217–2225. doi: 10.1002/jbmr.414

Table 1.

Sample descriptive characteristics

Total sample (n = 444)
Age (years) 10.7 ± 1.1
Menarche (%; Post) 10
Tanner stage (%; 1/2/3) 31/34/35
Maturity offset (years) −1.1 ± 1.0
Body mass (kg) 39.3 ± 9.6
Height (cm) 144.9 ± 9.2
Femur length (cm) 34.2 ± 2.9
Tibia length (cm) 33.3 ± 2.6
BMI (kg/m2) 18.5 ± 3.1
Lean mass (kg) 25.8 ± 4.8
Fat mass (kg) 11.2 ± 5.8
Fat mass (%) 27.8 ± 8.2
Thigh SAT (mm2) 2627.0 ± 1437.7
Thigh muscle density (mg/cm3) 76.3 ± 1.4
Femur BSI (mg2/mm4) 95.6 ± 26.6
Femur SSI (mm3) 1352.1 ± 367.5
Calf SAT (mm2) 1515.0 ± 770.4
Calf muscle density (mg/cm3) 78.9 ± 1.2
Tibia BSI (mg2/mm4) 52.0 ± 14.1
Tibia SSI (mm3) 1181.1 ± 318.5

Values are presented as mean ± SD or percent.

SAT = subcutaneous adipose tissue; BSI = bone strength index; SSI = strength-strain index.