Table 2.
Univariate analysis of clinical characteristics and survival in the derivation cohort.
| CHARACTERISTIC | NUMBER OF PATIENTS (%) | P-VALUE | |
|---|---|---|---|
| DERIVATION COHORT N = 330 | VALIDATION COHORT N = 140 | ||
| N = 330 | N = 140 | ||
| Male sex | 193 (58) | 72 (51) | 0.158 |
| Age > 70 | 148 (45) | 67 (48) | 0.549 |
| Independent ADLs | 160 (48) | 76 (54) | 0.25 |
| Not-completely-independent ADLs | 128 (39) | 47 (34) | 0.285 |
| PMH CVA | 37 (11) | 15 (11) | 0.875 |
| CRI/ESRD | 71 (22) | 29 (21) | 0.846 |
| Angina pectoris | 102 (31) | 36 (26) | 0.258 |
| CHF (III or IV) | 98 (30) | 36 (26) | 0.382 |
| PMH MI | 73 (22) | 24 (17) | 0.223 |
| Cancer | 82 (25) | 32 (23) | 0.645 |
| Cirrhosis | 9 (3) | 6 (4) | 0.379 |
| Dementia | 13 (4) | 4 (3) | 0.566 |
| Respiratory insufficiency | 114 (35) | 47 (34) | 0.839 |
| Immunocompromised | 8 (2) | 4 (3) | 0.786 |
| Sepsis | 25 (8) | 9 (6) | 0.661 |
| Pneumonia | 46 (14) | 19 (14) | 0.916 |
| Recent MI | 90 (27) | 41 (29) | 0.656 |
| CVA | 14 (4) | 8 (6) | 0.49 |
| Coma | 13 (4) | 3 (2) | 0.326 |
| Ventilation | 145 (44) | 71 (51) | 0.178 |
| Hypotension | 94 (28) | 35 (25) | 0.439 |
| S3 gallop | 1 (<1) | 0 (0) | 0.514 |
| Oliguria | 4 (1) | 2 (1) | 0.848 |
| Pulmonary edema | 73 (22) | 37 (26) | 0.313 |
| Abnl BUN | 48 (15) | 23 (16) | 0.602 |
| Abnl Cr | 136 (41) | 51 (36) | 0.333 |
| Abnl pH | 75 (23) | 28 (20) | 0.513 |
| Abnl PaCO2 | 95 (29) | 38 (27) | 0.717 |
| Abnl PaO2 | 23 (7) | 11 (8) | 0.734 |
| Abnl bicarb | 31 (9) | 11 (8) | 0.593 |
| Deceased | 245 (74) | 104 (74) | 0.992 |
Notes: The four features in bold demonstrated a statistically significant difference between patients who survived and did not survive (via χ2 analysis at the 0.05 level).