From: Risk stratification and mortality prediction in octo- and nonagenarians with peripheral artery disease: a retrospective analysis
Model
Adjusted R2
R2 change
Sig. F Change
Troponin I Ultra
0.231
0.239
 < 0.001
Troponin I Ultra and NTproBNP blood levels
0.281
0.058
0.006
Troponin I Ultra, NTproBNP and Rutherford stage
0.308
0.033
0.034