Table 1.
Sample Characteristics and Bone Measurements
| Variable (unit) | n | Mean (or %) | SD |
|---|---|---|---|
| Age (years) | 1064 | 72.2 | 7.7 |
| Height (inches) | 1063 | 65.4 | 3.7 |
| Sex (men/women) | 456/608 | 42.9/57.14% | |
| Postmenopausal women | 600 | 98.7% | |
| Radial microarchitecture | 986 | ||
| Total density, Tt.vBMD (mg/cm3 HA) | 311.53 | 68.96 | |
| Cortical porosity, Ct.Po (%) | 3.96 | 2.20 | |
| Cortical thickness, Ct.Th (mm) | 0.87 | 0.21 | |
| Cortical area fraction (Ct.Ar/TtAr) (%) | 18.65 | 6.38 | |
| Cortical density, Ct.vBMD (mg/cm3 HA) | 957.04 | 60.40 | |
| Trabecular density, Tb.vBMD (mg/cm3 HA) | 163.34 | 43.35 | |
| Trabecular number, Tb.N (mm−1) | 2.05 | 0.38 | |
| Trabecular thickness, Tb.Th (mm) | 0.066 | 0.012 | |
| Tibial microarchitecture | 1047 | ||
| Total density, Tt.vBMD (mg/cm3 HA) | 284.31 | 60.66 | |
| Cortical porosity, Ct.Po (%) | 10.05 | 3.23 | |
| Cortical thickness, Ct.Th (mm) | 1.19 | 0.30 | |
| Cortical area fraction (Ct.Ar/TtAr) (%) | 15.24 | 5.38 | |
| Cortical density, Ct.vBMD (mg/cm3 HA) | 856.23 | 75.21 | |
| Trabecular density, Tb.vBMD (mg/cm3 HA) | 175.71 | 41.02 | |
| Trabecular number, Tb.N (mm−1) | 2.08 | 0.40 | |
| Trabecular thickness, Tb.Th (mm) | 0.070 | 0.012 | |
| DXA aBMD (g/cm2) | 1064 | ||
| Ultradistal radius | 0.462 | 0.103 |
HA = hydroxyapatite.