Harrell’s C-Index for models 1, 2, and 3
| Model | Harrell’s C-Index | Change in Harrell’s C-Index (% change)* |
| Model 1: Standard fracture risk factors only (without BMD) | 0.764 (0.718 to 0.810) | – |
| Model 2: Standard fracture risk factors only (with binary BMD) | 0.759 (0.712 to 0.806) | −0.005 (-0.65%) |
| Model 3: Standard fracture risk factors only (with continuous BMD) | 0.773 (0.732 to 0.814) | 0.009 (1.17%) |
*All change is measures against Model 1.
BMD, bone mineral density.