Table 2.
Patient Characteristics for all Patients, Derivation Set, and Validation Set.
| Variable | Overall, n = 3297 | Derivation, n = 2209 | Validation, n = 1088 | P Value |
|---|---|---|---|---|
| Age | ||||
| Median (Q1, Q3) | 59 (48,70) | 59 (47, 59) | 59 (48, 70) | .594a |
| Gender | ||||
| Female | 1685 (51) | 1122 (51) | 563 (52) | .606b |
| Race | ||||
| African American | 1685 (51) | 1131 (51) | 554 (50) | .856b |
| White | 1455 (44) | 970 (44) | 485 (45) | |
| Other | 157 (5) | 108 (5) | 49 (5) | |
| Comorbidities (%) | ||||
| AIDS | 119 (4) | 30 (3) | 89 (4) | .065b |
| Cancer | 340 (10) | 108 (10) | 232 (11) | .600b |
| CHF | 689 (21) | 235 (22) | 454 (21) | .499b |
| COPD | 1095 (33) | 380 (35) | 715 (32) | .149b |
| CVD | 277 (8) | 100 (9) | 177 (8) | .256b |
| DM (no complications) | 1020 (31) | 336 (31) | 684 (31) | .943b |
| DM (complications) | 255 (8) | 82 (8) | 173 (8) | .758b |
| Dementia | 175 (5) | 55 (5) | 120 (5) | .643b |
| ESRD | 263 (8) | 95 (9) | 168 (8) | .262b |
| Liver (mild) | 342 (10) | 104 (10) | 238 (11) | .276b |
| Liver (moderate-severe) | 72 (2) | 21 (2) | 51 (2) | .481b |
| Myocardial infarction | 234 (7) | 80 (7) | 154 (7) | .696b |
| Metastatic cancer | 114 (3) | 36 (3) | 78 (4) | .738b |
| Charlson index | ||||
| Median (Q1, Q3) | 2 (1,4) | 2 (1,4) | 2 (1,4) | .752a |
Abbreviations: AIDS, acquired immunodeficiency syndrome; CHF, congestive heart failure; COPD, chronic obstructive pulmonary disease; CVD, cardiovascular disease; DM, diabetes mellitus; ESRD, end-stage renal disease; Q1, 1st quartile; Q3, 3rd quartile.
a
Wilcoxon rank-sum test.
b
Pearson χ2 test.