| Variable | Underweight (BMI <18.5 kg·m−2) | Normal (BMI 18.5–24.9 kg·m−2) | Overweight (BMI 25–29.9 kg·m−2) | Obese (BMI 30–39.9 kg·m−2) | Morbidly obese (BMI ≥40 kg·m−2) |
| Subjects | 650 | 5653 | 6689 | 5012 | 742 |
| Age | 69.0±3.5 | 69.0±12.3 | 68.5±11.7 | 65.4±11.3 | 59.8±10.4 |
| Male | 626 (96.3) | 5492 (97.2) | 6549 (97.9) | 4840 (96.6) | 703 (94.7) |
| Race | |||||
| White | 417 (64.7) | 3693 (65.5) | 4216 (63.2) | 3354 (67.0) | 501 (67.7) |
| Black | 135 (20.9) | 1190 (21.1) | 1504 (22.6) | 1130 (22.6) | 188 (25.4) |
| Hispanic | 86 (13.3) | 677 (12.0) | 807 (12.1) | 445 (8.9) | 43 (5.8) |
| Other/unknown | 7 (1.1) | 75 (1.3) | 144 (2.2) | 78 (1.6) | 8 (1.1) |
| Married | 284 (43.7) | 2824 (50.0) | 3792 (56.7) | 2858 (57.0) | 392 (52.8) |
| Medical comorbidities | |||||
| Diabetes | 80 (12.3) | 1470 (26.0) | 2926 (43.7) | 3160 (63.1) | 586 (79.0) |
| Diabetes with complications | 24 (3.7) | 600 (10.6) | 1385 (20.7) | 1725 (34.4) | 349 (47.0) |
| AIDS | 12 (1.9) | 117 (2.1) | 75 (1.1) | 45 (0.9) | 4 (0.5) |
| Cancer | 222 (34.2) | 2066 (36.6) | 2466 (36.9) | 1620 (32.3) | 177 (23.9) |
| Stroke | 134 (20.6) | 1721 (30.4) | 2208 (33.0) | 1568 (31.3) | 154 (20.8) |
| Congestive heart failure | 124 (19.1) | 1633 (28.9) | 2442 (36.5) | 2358 (47.1) | 432 (58.2) |
| Cirrhosis | 16 (2.5) | 155 (2.7) | 210 (3.1) | 183 (3.7) | 20 (2.7) |
| COPD | 513 (78.9) | 4051 (71.7) | 4570 (68.3) | 3600 (71.8) | 575 (77.5) |
| Hepatic failure | 3 (0.5) | 69 (1.2) | 100 (1.5) | 90 (1.8) | 7 (0.9) |
| HIV | 5 (0.8) | 68 (1.2) | 49 (0.7) | 24 (0.5) | 2 (0.3) |
| Leukaemia | 13 (2.0) | 170 (3.0) | 259 (3.9) | 184 (3.7) | 16 (2.2) |
| Myocardial infarction | 54 (8.3) | 641 (11.3) | 993 (14.9) | 711 (14.2) | 94 (12.7) |
| Perivascular disease | 148 (22.8) | 1531 (27.1) | 1990 (29.8) | 1477 (29.5) | 191 (25.7) |
| Hemiplegia/paraplegia | 13 (2.0) | 156 (2.8) | 179 (2.7) | 119 (2.4) | 14 (1.9) |
| Peptic ulcer disease | 58 (8.9) | 496 (8.8) | 548 (8.2) | 352 (7.0) | 34 (4.6) |
| Renal disease | 60 (9.2) | 958 (17.0) | 1577 (23.6) | 1377 (27.5) | 202 (27.2) |
| Rheumatological disease | 21 (3.2) | 263 (4.7) | 371 (5.6) | 257 (5.1) | 45 (6.1) |
| Cancer with metastasis | 36 (5.5) | 385 (6.8) | 463 (6.9) | 298 (6.0) | 23 (3.1) |
| Psychiatric comorbidities | |||||
| Alcohol use disorder | 70 (10.8) | 533 (9.4) | 409 (6.1) | 238 (4.8) | 19 (2.6) |
| Substance use disorder | 7 (1.1) | 137 (2.4) | 143 (2.1) | 116 (2.3) | 12 (1.6) |
| Tobacco dependence | 46 (7.1) | 368 (6.5) | 429 (6.4) | 339 (6.8) | 59 (8.0) |
| Post-traumatic stress disorder | 19 (2.9) | 157 (2.8) | 198 (3.0) | 220 (4.4) | 43 (5.8) |
| Dementia | 63 (9.7) | 517 (9.2) | 480 (7.2) | 199 (4.0) | 12 (1.6) |
| Psychotic disorders | 20 (3.1) | 260 (4.6) | 301 (4.5) | 250 (5.0) | 46 (6.2) |
Data are presented as n, mean±sd or n (%). COPD: chronic obstructive pulmonary disease.