Time Frame for Mortality | | |
6 month20,21 | 1 | 5.9 |
1 year22–26 | 5 | 29.4 |
15 month27 | 1 | 5.9 |
2 year28 | 1 | 5.9 |
3 year29,30 | 2 | 11.7 |
4 year31 | 1 | 5.9 |
5 year32–37 | 6 | 35.3 |
Country | | |
United States20,21,25,26,28,30,31,34–37 | 10 | 58.8 |
United Kingdom22,23,33 | 3 | 17.6 |
Italy24,27 | 2 | 11.8 |
Russia29 | 1 | 5.9 |
South Korea32 | 1 | 5.9 |
C-statistics | | |
0.50 to 0.59 (poor) | 0 | 0 |
0.60 to 0.69 (moderate)29,30 | 2 | 11.7 |
0.70 to 0.79 (good)22,23,25,31–34,38 | 8 | 47.1 |
0.80 to 0.89 (very good)20,21,24,26–28,36,37 | 7 | 41.2 |
0.90 to 1.00 (excellent) | 0 | 0 |
Calibration | | |
Well calibrated | 13 | 76.5 |
<10% Difference22,24,26–28,30,31,34,35,37 | 10 | 58.8 |
Hosmer-Lemeshow P > .0533,36 | 2 | 11.8 |
Cox calibration regression25 (perfect calibration: α = 0, β = 1) | 1 | 5.9 |
Poorly calibrated (>10% difference)32 | 1 | 5.9 |
Calibration curve only20,21 | 1 | 5.9 |
Not reported23,29 | 2 | 11.8 |
Usability† | | |
Clinically usable22,26–28,30,31,33,34,36,37 | 10 | 58.8 |
Not usable20,21,23–25,29,32,35 | 7 | 41.2 |