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. Author manuscript; available in PMC: 2009 Sep 14.
Published in final edited form as: J Bone Miner Res. 2007 Jan;22(1):101–109. doi: 10.1359/jbmr.060913

Table 1.

Age, Height, Total MVPA, and DXA-Derived Measures for TBLH and Upper and Lower Limbs in 2121 Boys and 2336 Girls

Boys
 Girls
 p
Mean SD Mean SD
Age (months) 141 3 141 3 0.5
Height (cm) 150.0 7.1 151.4 7.2 <0.001
Total MVPA
 (100 counts/minute)		 1.86 1.17 1.24 0.94 <0.001
TBLH
 Lean mass (kg) 30.0 4.1 29.2 4.4 <0.001
 Fat mass (kg) 10.1 6.4 12.7 6.4 <0.001
 BMC (g) 1177 244 1230 289 <0.001
 Area (cm2) 1384 202 1429 226 <0.001
 BMD (g/cm2) 0.844 0.060 0.851 0.071 <0.001
 aBMC (g) 1215 56 1212 60 0.05
Upper limb
 BMC (g) 158 35 168 40 <0.001
 Area (cm2) 227 50 242 43 <0.001
 BMD (g/cm2) 0.690 0.043 0.689 0.049 0.7
 aBMC (g) 166 8 163 9 <0.001
Lower limb
 BMC (g) 607 130 616 135 0.03
 Area (cm2) 600 85 604 82 0.1
 BMD (g/cm2) 1.004 0.090 1.010 0.100 0.04
 aBMC (g) 614 41 617 42 0.05