From: Does adding risk-trends to survival models improve in-hospital mortality predictions? A cohort study
 |  | Existing model with trend indicators | Existing model without trend indicators | ||||
---|---|---|---|---|---|---|---|
Risk Decile | # observed deaths | # expected deaths | z-score | p | # expected deaths | z-score | p |
1 | 5 | 4.31 | 0.3298 | 0.7415 | 5.37 | 0.1609 | 0.8722 |
2 | 9 | 12.75 | 1.0498 | 0.2938 | 13.68 | 1.2664 | 0.2054 |
3 | 21 | 24.74 | 0.7527 | 0.4517 | 26.03 | 0.9853 | 0.3245 |
4 | 36 | 43.45 | 1.1298 | 0.2586 | 44.59 | 1.2861 | 0.1984 |
5 | 54 | 68.90 | 1.7952 | 0.0726 | 69.50 | 1.8597 | 0.0629 |
6 | 103 | 108.72 | 0.5482 | 0.5836 | 109.97 | 0.6646 | 0.5063 |
7 | 174 | 171.65 | 0.1796 | 0.8575 | 173.49 | 0.0386 | 0.9692 |
8 | 260 | 285.35 | 1.5008 | 0.1334 | 285.02 | 1.4821 | 0.1383 |
9 | 453 | 474.99 | 1.0090 | 0.3130 | 478.93 | 1.1850 | 0.2360 |
10 | 1525 | 1496.72 | 0.7309 | 0.4649 | 1497.23 | 0.7177 | 0.4729 |
Total | 2640 | 2691.59 | 0.9943 | 0.3201 | 2703.82 | 1.2274 | 0.2197 |