Table 5.
Regression model statistics for non-dominant arm DXA adjusted for arm lean mass.
| Radius DXA Output | Cohort A | Cohort B | ||||
|---|---|---|---|---|---|---|
| Adj. Model R2 | β[95% CI]SPCC | Adj. Model R2 | β[95% CI]SPCC | |||
| Arm nbFFM | 3 Year Arm totBLI | Arm nbFFM | 3 Year Arm totBLI | |||
| 1/3 Area | 0.33c |
0.410 [0.146,0.674] +0.35b |
0.010 [0.002,0.018] +0.28a |
0.52c |
0.427 [0.284,0.570] +0.61c |
0.003 [-0.004,0.01] +0.08ns |
| 1/3 BMC | 0.46c |
0.386 [0.161,0.610] +0.35c |
0.012 [0.005,0.018] +0.36c |
0.50c |
0.362 [0.198,0.526] +0.46c |
0.010 [0.002,0.018] +0.26a |
| 1/3 aBMD | 0.23b |
0.061 [-0.019,0.142] +0.18ns |
0.003 [0.001,0.006] +0.30a |
0.20b | 0.017 [-0.028,0.063] +0.10ns |
0.003 [0.001,0.005] +0.36b |
| UD Area | 0.43c |
0.321 [0.060,0.581] +0.25a |
0.010 [0.002,0.017] +0.26a |
0.52c |
0.427 [0.229,0.624] +0.44c |
0.007 [-0.003,0.017] +0.14ns |
| UD BMC | 0.57c |
0.518 [0.272,0.765] +0.38c |
0.017 [0.010,0.024] +0.41c |
0.67c |
0.23 [0.136,0.322] +0.42c |
0.01 [0.007,0.016] +0.41c |
| UD aBMD | 0.54c |
0.116 [0.054,0.178] +0.35c |
0.004 [0.002,0.006] +0.39c |
0.62c |
0.052 [-0.019,0.085] +0.29b |
0.004 [0.002,0.006] +0.46c |
| Arm Area | 0.51c |
42.71 [25.12,60.30] +0.46c |
0.109 [-0.414,0.632] +0.04ns |
0.59c |
31.79 [18.71,44.87] +0.46c |
-0.203 [-0.854,0.448] -0.06ns |
| Arm BMC | 0.60c |
49.01 [32.60,65.43] +0.52c |
0.575 [0.09,1.06] +0.20a |
0.76c |
0.298 [0.223,0.373] +0.57c |
0.003 [0.000,0.007] +0.130.078 |
| Arm aBMD | 0.58c |
0.105 [0.059,0.152] +0.40c |
0.003 [0.002,0.005] +0.40c |
0.66c |
0.112 [0.074,0.150] +0.50c |
0.004 [0.002,0.005] +0.32c |
| *Arm nbFFM | 0.70c |
0.052 [0.041,0.064] +0.67c |
5.80 [0.80,10.80] +0.17a |
0.76c |
0.066 [0.052,0.080] +0.66c |
14.67 [6.70,22.64] +0.26c |
Italic font indicates ln-transformed dependent variables.
BMC= bone mineral content; aBMD= areal bone mineral density;
Arm= Non-dominant Arm; nbFFM= non-bone lean mass.
All models included gynecological age and height as independent variables (not shown), as well as Arm nbFFM and arm BLI, except models with Arm nbFFM* as the dependent variable, for which whole body nbFFM was entered.
For Adjusted Model R2 and t significance of β:
a
p<0.05;
b
p≤0.01;
c
p≤0.001.
If 0.05 ≤ p ≤0.10, and for Arm totBLI, p is noted as parenthetic superscript, unless <0.001.