Table 2.
Comparison of the variables including outcome, demographics, and laboratory findings between train and validation cohorts
| Characteristics | Train cohort (N = 2422) | Validation cohort (N = 434) | P |
|---|---|---|---|
| Outcome variable N, (%) | |||
| Readmission | 581 (23.9) | 102 (23.5) | 0.270 |
| Demographics | |||
| Age mean (std) | 69.9 (14.3) | 70.4 (13.9) | 0.228 |
| Female (%) | 47.6 | 46.3 | 1.00 |
| Race N (%) | 0.270 | ||
| African American | 291 (12.0) | 51 (11.8) | |
| Hispanic | 76 (3.10) | 18 (4.15) | |
| Others, non-Hispanic | 170 (7.00) | 37 (8.53) | |
| White | 1835 (75.8) | 325 (74.9) | |
| Asian | 50 (2.10) | 3 (0.691) | |
| Laboratory findings mean (std) | |||
| Sodium | 138.6 (4.58) | 138.5 (4.80) | 0.835 |
| Urea nitrogen | 34.4 (24.0) | 32.6 (22.3) | 0.017 |
| NT proBNP | 0.187 (0.380) | 0.181 (0.385) | 0.613 |
| Serum creatinine | 0.002 (0.04955) | 0.004 (0.062) | 0.083 |
Pro-BNP, Pro-brain natriuretic peptide