Table 5.
Reproducibility of bone variables at the 38% diaphyseal tibia (mean ± SEM)
| Variable | Premenopausal subjects (n = 7) | Postmenopausal subjects (n = 8) | All subjects (n = 15) | rmsCV (%)(n = 15) |
|---|---|---|---|---|
| Density (mg/cm3) | ||||
| TOT_DEN | 896 ± 15.1 | 884 ± 21.3 | 882 ± 17.1 | 5.7 |
| CRT_DEN | 1205 ± 8.4 | 1204 ± 12.2 | 1205 ± 7.4 | 0.3 |
| Mass (mg) | ||||
| TOT_CNT | 341 ± 21.3 | 309 ± 11.9 | 324 ± 12.2 | 1.3 |
| CRT_CNT | 324 ± 19.9 | 295 ± 10.4 | 308 ± 11.1 | 0.5 |
| Area (mm2) | ||||
| TOT_A | 381 ± 22.7 | 353 ± 17.6 | 369 ± 14.4 | 4.9 |
| CRT_A | 269 ± 17.5 | 245 ± 9.3 | 256 ± 9.7 | 0.6 |
| Geometry | ||||
| CRT_THK (mm) | 5.0 ± 0.2 | 4.8 ± 0.1 | 4.9 ± 0.1 | 4.6 |
| PERI_CIR (mm) | 69 ± 2.0 | 66 ± 1.7 | 68 ± 1.3 | 2.5 |
| ENDO_CIR (mm) | 37 ± 1.3 | 36 ± 2.0 | 37 ± 1.4 | 7.5 |
| PMI (mm3) | 22,480 ± 3265 | 18,120 ± 1539 | 20,146 ± 1763 | 1.1 |
| PMR (mm3) | 1486 ± 149 | 1308 ± 86 | 1391 ± 84 | 1.1 |
| SSI (mm3) | 1479 ± 145 | 1310 ± 83 | 1389 ± 81 | 1.2 |
CRT_A = cortical area; CRT_CNT = cortical content; CRT_DEN = cortical density; CRT_THK = cortical thickness; ENDO_CIR = endosteal circumference; PERI_CIR = periosteal circumference; PMI = polar moment of inertia; PMR = polar moment of resistance; rmsCV = root mean square coefficient of variation; SEM = standard error of the mean; SSI = stress-strain index; TOT_A = total area; TOT_CNT = total content; TOT_DEN = total density.