Average correlation coefficients (r, Pearson) between joint surfaces of the knee, ankle, and subtalar joint
| Surfaces/joints | N coeff averaged | Volume | Thickness | CJSA | |
|---|---|---|---|---|---|
| *Correlation coefficients significantly lower (p<0.05, Fischer z transformation) than those between cartilage plates of the same joint (compared with correlation coefficients in lines a to d). | |||||
| CJSA, cartilaginous joint surface area (cm2); N coeff, number of correlation coefficients; thickness, mean cartilage thickness (mm); volume, cartilage volume (ml). | |||||
| a) Knee | Knee | 6 | 0.77 | 0.68 | 0.75 |
| b) Ankle | Ankle | 1 | 0.81 | 0.87 | 0.74 |
| c) Subtalar | Subtalar | 1 | 0.95 | 0.74 | 0.93 |
| d) Hindfoot | Hindfoot | 6 | 0.81 | 0.63 | 0.78 |
| −) Knee | Ankle | 8 | 0.57 (b–d)* | 0.17 (a–d)* | 0.72 (c)* |
| –) Knee | Subtalar | 8 | 0.59 (b–d)* | 0.32 (a–c)* | 0.70 (c)* |
| –) Ankle | Subtalar | 4 | 0.78 (c)* | 0.54 (a)* | 0.76 (c)* |