Risk reclassification table comparing Model 1 (standard fracture risk factors alone) to Model 3 (standard fracture risk factors with continuous BMD measurement), using a clinical 8.5% risk cut-off
Model 3: SRF with continuous BMD | Total | Total no.(%) reclassified | ||||
<8.5% | ≥8.5% | |||||
Model 1: SRF without BMD | <8.5% | No. | 391 | 227 | 618 | 227 (36.7) |
% | 63.3 | 36.7 | ||||
No. of events | 5 | 9 | ||||
No. of non-events | 386 | 218 | ||||
Observed event rate | 1.3% | 4.0% | ||||
≥8.5% | No. | 302 | 1040 | 1342 | 302 (22.5) | |
% | 22.5 | 77.5 | ||||
No. of events | 10 | 121 | ||||
No. of non-events | 292 | 919 | ||||
Observed event rate | 3.3 | 11.6 | ||||
Total | 693 | 1267 | 1960 | 529 (27.0) |
BMD, bone mineral density; SRF, standard risk factors.