Differences in patient characteristics between the Cohen derviation and the external validation cohorts
| Derivation cohort | Validation cohort | P value | ||
| N | 449 | 1372 | ||
| Age (years) | mean (SD) | 60 (17) | 62 (15) | 0.034 |
| Male | n (%) | 254 (56.7) | 799 (58.2) | 0.567 |
| Caucasian | n (%) | 282 (64.8) | 810 (59.0) | 0.031 |
| Hispanic/Latin American | n (%) | 62 (14.3) | 15 (1.1) | <0.0001 |
| Surprise question*, ‘not surprised’ | n (%) | 71 (15.8) | 562 (41.0) | <0.0001 |
| Albumin (g/dL) | mean (SD) | 3.8 (0.4) | 3.6 (0.5) | <0.0001 |
| Albumin <3.5 (g/dL) | n (%) | 67 (14.9) | 498 (36.3) | <0.0001 |
| Peripheral vascular disease | n (%) | 15 (3.3) | 239 (17.4) | <0.0001 |
| Dementia | n (%) | 88 (19.6) | 33 (2.4) | <0.0001 |
| 6-month KM survival estimate | % (95% CI) | 95 (92 to 97) | 93 (92 to 94) | |
| Time on HD <3 months | n (%) | 71 (18.7) | 0 | |
*Derivation uses 6 months, validation uses 12 months.
KM, Kaplan-Meier.