Table 2.
Derivation sample (981) | Validation sample (964) | |||
---|---|---|---|---|
Risk group | No (931) | Yes (50) | No (893) | Yes (71) |
| ||||
Unclassified | 60 (92.3) | 5 (7.7) | 51 (85.0) | 9 (15.0) |
| ||||
Low | 634 (99.4) | 4 (0.6) | 594 (98.3) | 10 (1.7) |
| ||||
Medium | 115 (95.0) | 6 (5.0) | 130 (95.6) | 6 (4.4) |
High | 71 (85.5) | 12 (14.5) | 66 (79.5) | 17 (20.5) |
Very high | 51 (68.9) | 23 (31.2) | 52 (64.2) | 29 (35.8) |
| ||||
AUC | 0.875 (0.823–0.926) | 0.832 (0.777–0.888) |
Notes: Estimated mortality rate (P) was categorized and classified as mortality risk as follows: low (P<0.03), medium (0.03≤P<0.1), high (0.1≤P<0.2) and very high (P≥0.2). Dashed horizontal line shows the cutoff point for dichotomization of estimated 1-year mortality risk looking for optimal sensitivity–specificity combination in the derivation sample, leading to a sensitivity of 0.889 and a specificity of 0.758.
Abbreviation: AUC, area under the receiver operating characteristic curve.