Table 4.
Regression model statistics for non-dominant arm DXA adjusted for whole body lean mass.
| Radius DXA Output | Cohort A | Cohort B | ||||
|---|---|---|---|---|---|---|
| Adj. Model R2 | β [95% CI] SPCC | Adj. Model R2 | β [95% CI] SPCC | |||
| Whole Body nbFFM | 3 Year Arm totBLI | Whole Body nbFFM | 3 Year Arm totBLI | |||
| 1/3 Area | 0.28c |
0.022 [0.003,0.040] +0.27a |
0.012 [0.004,0.020] +0.36b |
0.46c |
0.032 [0.020,0.044] +0.56c |
0.008 [0.002,0.015] +0.26a |
| 1/3 BMC | 0.46c |
0.021 [0.005,0.037] +0.28b |
0.014 [0.007,0.021] +0.44c |
0.43c |
0.024 [0.010,0.038] +0.38c |
0.015 [0.007,0.023] +0.43c |
| 1/3 aBMD | 0.22b |
0.004 [-0.002,0.009] +0.16ns |
0.003 [0.001,0.006] +0.36b |
0.19b | 0.000 [-0.003,0.004] +0.02ns |
0.003 [0.001,0.006] +0.44b |
| UD Area | 0.41c | 0.017 [0.000,0.035] +0.200.06 |
0.011 [0.004,0.019] +0.32b |
0.53c |
0.035 [0.020,0.051] +0.46c |
0.012 [0.003,0.021] +0.28b |
| UD BMC | 0.50c |
0.025 [0.007,0.043] +0.27b |
0.020 [0.013,0.028] +0.52c |
0.68c |
0.019 [0.011,0.026] +0.43c |
0.014[0.010,0.018] +0.56c |
| UD aBMD | 0.47c |
0.005 [-0.001,0.010] +0.24a |
0.005 [0.003,0.007] +0.50c |
0.62c |
0.004 [0.002,0.007] +0.29b |
0.005 [0.003,0.006] +0.58c |
| Arm Area | 0.46c |
2.563 [1.33,3.80] +0.42c |
0.307 [-0.21,0.83] +0.12ns |
0.60c |
2.6 [1.55,3.64] +0.47c |
0.191 [-0.393,0.775] +0.06ns |
| Arm BMC | 0.52c |
2.79 [1.58,4.0] +0.44c |
0.826 [0.318,1.334] +0.31b |
0.70c |
0.022 [0.015,0.028] +0.51c |
0.007 [0.004,0.011] +0.31c |
| Arm aBMD | 0.51c |
0.005 [0.002,0.009] +0.30b |
0.004 [0.002,0.005] +0.51c |
0.54c |
0.007 [0.003,0.010] +0.38c |
0.005 [0.003,0.007] +0.52c |
| *Arm nbFFM | 0.23c | ------------- |
0.014 [0.006,0.021] +0.44c |
0.30c | ----------- |
0.024 [0.011,0.037] +0.45c |
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 whole body nbFFM and arm BLI, except models to explain Arm nbFFM (*lean mass excluded). 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.