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| Characteristic | N (%) |
| Age, mean ± SD | 77.6 ± 8.3 |
| Sex, male | 150 (51.7%) |
| BMI < 18.5 | 20 (6.9%) |
| BMI 18.5 – 25.9 | 106 (36.6%) |
| BMI 26 – 29.9 | 75 (25.9%) |
| BMI 30 – 35.9 | 52 (17.9%) |
| BMI 36 – 40 | 17 (5.9%) |
| BMI > 40 | 20 (6.9%) |
| Past medical history | |
| Asthma | 18 (6.2%) |
| Coronary artery disease | 80 (27.6%) |
| Chronic obstructive pulmonary disease | 19 (6.6%) |
| Diabetes mellitus | 150 (51.7%) |
| End-stage renal disease | 37 (12.8%) |
| Hypertension | 236 (81.4%) |
| Obstructive sleep apnea | 11 (3.8%) |
