Table 3.

Comparisons of Model Discrimination of Those With from Those Without Prevalent Radiographic Vertebral Fracture

Comparison Measure	Model 2 vs. 1	Model 3 vs. 2	Model 4 vs. 2
&Range of C-stat chi2 (Range of p-values)	8.55 – 16.5 (<0.001 to 0.003)	0.00 – 1.02 (0.28 to 0.96)	0.01 – 2.13 (0.14 to 0.92)
NRI – 5%^ (p-value)	0.059 (0.01)	0.026 (0.22)	0.038 (0.13)
NRI – 10%** (p-value)	0.049 (0.09)	0.003 (0.90)	0.037 (0.26)
NRI – 15%^^ (p-value)	0.024 (0.22)	0.006 (0.78)	0.012 (0.64)

^&Comparisons across five pairs of bootstrapped models

^{^}Net Reclassification Index Score (Pepe Method), with a pre-test probability cutpoint of 5%

^**Net Reclassification Index Score (Pepe Method), with a pre-test probability cut point of 10%

^{^^}Net Reclassification Index Score (Pepe Method), with a pre-test probability cut point of 15%