| Subgroups | Score | Survivors | Non-survivors | p |
---|---|---|---|---|---|
Derivation cohort | Low-risk group | ≤5.5 | 275 (94.8%) | 15 (5.2%) | < 0.001 |
High-risk group | > 5.5 | 53 (55.2%) | 43 (44.8%) |  | |
Validation cohort | Low-risk group | ≤5.5 | 125 (95.4%) | 6 (4.6%) | < 0.001 |
High-risk group | > 5.5 | 21 (55.3%) | 17 (44.7%) |  |