Table 3.
Differences in bone static and dynamic indices between black and white women.
| Variable | Overall |
Black |
White |
p |
|---|---|---|---|---|
| n = 50 | n = 25 | n = 25 | ||
| Structural indices | ||||
| BV/TV (%) | 23.6 (6.95) | 24.7 (6.42) | 22.5 (7.43) | 0.274 |
| Tb.Th (μm) | 142 (27.6) | 152 (30.8) | 132 (19.4) | 0.026 |
| Tb.N (#/mm) | 1.66 (0.383) | 1.63 (0.319) | 1.68 (0.443) | 0.649 |
| Static indices | ||||
| ES/BS (%) | 7.21 (3.50) | 6.94 (3.76) | 7.48 (3.28) | 0.558 |
| Oc.S/BS (%) | 1.21 (0.905) | 1.33 (1.01) | 1.09 (0.792) | 0.423 |
| OV/BV (%) | 2.38 (1.50) | 2.26 (1.63) | 2.50 (1.37) | 0.410 |
| OS/BS (%) | 20.0 (13.2) | 19.7 (15.1) | 20.4 (11.3) | 0.541 |
| ulOS/BS (%) | 14.1 (9.26) | 12.9 (8.50) | 15.3 (9.98) | 0.357 |
| O.Th (μm) | 8.23 (1.62) | 8.32 (1.87) | 8.14 (1.35) | 0.892 |
| W.Th (μm) | 34.4 (3.85) | 35.0 (4.12) | 33.8 (3.55) | 0.269 |
| Ob.S/BS (%) | 6.92 (5.36) | 6.23 (6.69) | 7.21 (3.70) | 0.154 |
| Dynamic indices | ||||
| MS/BS (%) | 5.94 (6.10) | 6.83 (7.93) | 5.05 (3.39) | 0.503 |
| MS/OS (%) | 27.9 (17.3) | 31.1 (14.9) | 24.7 (19.2) | 0.194 |
| MAR (μm/day) | 0.547 (0.153) | 0.543 (0.120) | 0.551 (0.182) | 0.734 |
| Aj.AR (μm/day) | 0.172 (0.108) | 0.182 (0.082) | 0.163 (0.128) | 0.156 |
| Omt (days) | 17.7 (14.0) | 16.5 (6.46) | 18.8 (18.7) | 0.674 |
| MLT (days) | 74.6 (63.3) | 59.4 (40.1) | 89.2 (77.6) | 0.271 |
| BFRs (μm3/μm2/year) | 11.0 (8.09) | 11.3 (7.95) | 10.7 (8.37) | 0.705 |
| Ac.f (#/year) | 0.319 (0.228) | 0.326 (0.229) | 0.312 (0.230) | 0.764 |
Data expressed as mean (SD).