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. Author manuscript; available in PMC: 2014 Feb 22.
Published in final edited form as: J Biomech. 2012 Dec 6;46(4):745–750. doi: 10.1016/j.jbiomech.2012.11.019

Table 1.

Bone quantity, size, and bending strength parameters. R values represent correlation coefficient with ultimate loads (Fult or Mult).

Met2 Met3
Units Mean ± SD R Mean ± SD R
Ultimate loads
    Fult N 572 ± 299 n/a 406 ± 244 n/a
    Mult N*m 4.72 ± 2.47 n/a 3.36 ± 2.01 n/a
Bone quantity parameters
    Whole-bone BMD mg/cm3 403 ± 91 0.770 367 ± 91 0.730
    Mid-diaphysis BMD mg/cm3 806 ± 205 0.705 725 ± 195 0.623
Mid-diaphysis size parameters
    Total Area (Atot) mm2 50.9 ± 11.5 0.464 49.0 ± 9.5 0.713
    Buckling Ratio (BR) unitless 2.29 ± 0.54 −0.801 2.50 ± 0.55 −0.624
    Average thickness (tavg) mm 1.84 ± 0.49 0.923 1.64 ± 0.40 0.829
Areal, unit density bending strength parameters
    IArea.min mm4 156.7 ± 70.0 0.716 133.6 ± 65.3 0.789
    IArea.max mm4 253.3 ± 143.8 0.399 236.1 ± 92.5 0.696
    SArea.min mm3 39.9 ± 13.9 0.704 35.2 ± 13.2 0.824
    SArea.max mm3 50.4 ± 20.9 0.444 47.3 ± 14.1 0.701
Density-weighted bending strength parameters
    Iρ.min mg·mm2 73.7 ± 35.2 0.756 58.9 ± 34.3 0.848
    Iρ.max mg·mm2 119.7 ± 71.6 0.428 108.5 ± 47.0 0.723
    Sρ.min mg·mm 17.8 ± 6.7 0.822 14.5 ± 6.9 0.867
    Sρ.max mg·mm 28.7 ± 13.4 0.460 27.0 ± 10.1 0.678

(Abbreviations: Fult = ultimate force; Mult = ultimate moment; BMD = bone mineral density; A_tot = total cross-sectional area; BR = buckling ratio; tavg = average thickness; IArea.min = areal, unit-density minimum moment of inertia; IArea.max = areal, unit-density maximum moment of inertia; SArea.min = areal, unit-density minimum section modulus; SArea.max = areal, unit-density maximum section modulus; Iρ.min = density-weighted minimum moment of inertia; Iρ.max = density-weighted maximum moment of inertia; Sρ.min = density-weighted minimum section modulus; Sρ.max = density-weighted maximum section modulus)