| Variable | Alive at 30 days | Died within 30 days | p-value | Alive at 90 days | Died within 90 days | p-value |
| Subjects | 5787 | 566 | 5337 | 1016 | ||
| Age yrs | 74.8±5.8 | 76.3±6.5 | 0.9 | 74.8±5.8 | 75.8±6.3 | 0.9 |
| Males | 5708 (98.6) | 561 (99.1) | 0.33 | 5265 (98.6) | 1004 (98.8) | 0.66 |
| Married | 3109 (53.8) | 294 (51.9) | 0.48 | 2882 (54.1) | 521 (51.3) | 0. 10 |
| Pre-existing comorbid conditions | ||||||
| Congestive heart failure | 2734 (47.2) | 254 (44.8) | 0.28 | 2505 (46.9) | 483 (47.5) | 0.72 |
| Myocardial infarction | 1271 (21.9) | 105 (18.5) | 0.06 | 1542 (28.8) | 344 (33.8) | 0.001 |
| Moderate or severe liver disease | 26 (0.4) | 4 (0.7) | 0.39 | 500 (9.3) | 130 (12.8) | 0.001 |
| Dementia | 562 (9.7) | 68 (12.0) | 0.08 | 23 (0.4) | 7 (0.6) | 0.27 |
| Peripheral vascular disorders | 1786 (30.8) | 156 (27.5) | 0.10 | 1653 (30.9) | 289 (28.4) | 0.10 |
| Cerebrovascular disease | 1707 (29.5) | 179 (31.6) | 0.29 | 1171 (21.9) | 205 (20.1) | 0.21 |
| Hemiplegia or paraplegia | 313 (5.4) | 31 (5.4) | 0.94 | 279 (5.2) | 65 (6.4) | 0.13 |
| Diabetes, uncomplicated | 1937 (33.4) | 158 (27.9) | 0.007 | 1794 (33.6) | 301 (29.6) | 0.013 |
| Diabetes, complicated | 922 (15.9) | 53 (9.3) | <0.001 | 855 (16.0) | 120 (11.8) | <0.001 |
| Renal failure | 743 (12.8) | 72 (12.7) | 0.93 | 658 (12.3) | 157 (15.4) | 0.006 |
| Mild liver disease | 184 (3.1) | 26 (4.5) | 0.07 | 167 (3.1) | 43 (4.2) | 0.07 |
| Peptic ulcer disease | 830 (14.3) | 62 (10.9) | 0.02 | 768 (14.3) | 124 (12.2) | 0.06 |
| AIDS | 18 (0.3) | 0 (0) | 0.18 | 15 (0.2) | 3 (0.3) | 0.93 |
| Metastatic cancer | 488 (8.4) | 96 (16.9) | <0.001 | 398 (7.4) | 186 (18.3) | <0.001 |
| Solid tumour without metastasis | 2200 (38.0) | 237 (41.8) | 0.07 | 1979 (37.1) | 458 (45.1) | <0.001 |
| Rheumatoid arthritis/collagen vascular diseases | 416 (7.1) | 34 (6.0) | 0.29 | 385 (7.2) | 65 (6.4) | 0.35 |
| Geriatric care | 419 (7.6) | 45 (8.1) | 0.65 | 378 (7.4) | 86 (8.7) | 0.15 |
| Diabetes medications | 0.58±1.4 | 0.38±1.1 | <0.001 | 0.6±1.4 | 0.4±1.2 | 0.002 |
| Cardiovascular medications | 3.2±2.9 | 2.4±2.6 | <0.001 | 3.2±2.9 | 2.7±2.7 | <0.001 |
| Respiratory medications | 3.1±2.3 | 2.4±2.3 | <0.001 | 3.1±2.3 | 2.7±2.3 | <0.001 |
Data are presented as n, n (%) or mean±sd, unless otherwise stated.