Table III.
Fitting coefficients for sigmoidal mineral density function.
| A | B | C | ||
|---|---|---|---|---|
| LA | Healthy | 993.16 (915.16, 1071.15) | −3.37 (−4.55, −2.19) | −0.027 (−0.030, −0.023) |
| OA | 965.08 (909.10, 1021.21) | −3.78 (−4.77, −2.78) | −0.022 (−0.026, −0.018) | |
| LP | Healthy | 1000.20 (919.19, 1081.21) | −5.20 (−8.40, −1.99) | −0.026 (−0.030, −0.022) |
| OA | 1060.26 (945.19, 1175.34) | −5.17 (−8.05, −2.30) | −0.022 (−0.025, −0.020) | |
| MA | Healthy | 911.79 (833.74, 989.85) | −3.26 (−4.55, −1.97) | −0.025 (−0.029, −0.020) |
| OA | 923.83 (845.53, 1002.12) | −2.97 (−3.52, −2.42) | −0.021 (−0.025, −0.020) | |
| MP | Healthy | 966.20 (877.63, 1054.77) | −3.89 (−4.99, −2.79) | −0.026 (−0.033, −0.018) |
| OA | 1005.38 (901.83, 1108.93) | −5.64 (−9.10, −2.17) | −0.023 (−0.024, −0.022) |
A – represents the peak mineral density. B – represents a horizontal shift in the function, indicative of an initially gradual increase in mineral content. C – represents mineral density growth rate. (N = 8 healthy knees, N = 7 OA knees)