Table 1.
Comparison of whole, cortical, and cancellous bone stiffness at the distal femoral diaphysis, metaphysis, and epiphysis in dancers versus healthy, relatively inactive controls
| Stiffness (kN/mm) | Dancers mean | Dancers standard deviation | Controls mean | Controls standard deviation | p value |
|---|---|---|---|---|---|
| Distal femoral diaphysis | |||||
| Whole | 481 | ±63.9 | 428 | ±43.7 | 0.047 |
| Cortical | 150 | ±18.5 | 164 | ±19.8 | 0.14 |
| Cancellous | 260 | ±42.8 | 210 | ±43.3 | 0.021 |
| Distal femoral metaphysis | |||||
| Whole | 849 | ±80.9 | 726 | ±70.7 | 0.0024 |
| Cortical | 65 | ±40.6 | 83 | ±42.1 | 0.59 |
| Cancellous | 635 | ±86.1 | 543 | ±83.8 | 0.029 |
| Distal femoral epiphysis | |||||
| Whole | 1,212 | ±40.7 | 1,120 | ±85.4 | 0.0091 |
| Cortical | 183 | ±25.8 | 191 | ±23.3 | 0.49 |
| Cancellous | 907 | ±47.8 | 812 | ±75.4 | 0.0047 |