Table 1. Demographic and Clinical Characteristics of the Study Sample.
| Characteristic | n | % |
|---|---|---|
| Age (mean, yrs) | 4,534 | 76.0 |
| Age (yrs) | ||
| <65 | 675 | 14.9 |
| 65-74 | 1,040 | 22.9 |
| 75-84 | 1,731 | 38.2 |
| ≥85 | 1,088 | 24.0 |
| Male | 4,537 | 43.2 |
| Caucasian | 4,537 | 94.2 |
| Body mass index (mean) | 3,722 | 27.7 |
| Comorbidities | ||
| Anemia | 4,537 | 23.5 |
| Chronic lung disease | 4,537 | 34.8 |
| Coronary heart disease | 4,537 | 56.8 |
| Diabetes | 4,537 | 39.9 |
| Heart failure | 4,537 | 74.6 |
| Hyperlipidemia | 4,537 | 20.1 |
| Hypertension | 4,537 | 65.2 |
| Myocardial infarction | 4,537 | 47.9 |
| Renal failure/disease | 4,537 | 23.3 |
| Stroke | 4,537 | 14.6 |
| Physiologic findings (mean) | ||
| Systolic blood pressure (mmHg) | 4,524 | 144.6 |
| Diastolic blood pressure (mmHg) | 4,470 | 76.8 |
| Heart rate (bpm) | 4,532 | 90.7 |
| eGFR | 4,472 | 63.1 |
| Blood urea nitrogen (mg/dl) | 4,482 | 34.4 |
| Serum sodium (mg/dl) | 4,495 | 137.2 |
| Died during hospitalization | 4,537 | 6.8 |