Table 1. Baseline characteristics for patients stratified by age ≤ 80 years and > 80 years.
| Characteristics | ≤ 80 years (n = 152) | > 80 years (n = 71) | P-value |
| Data are presented as median (interquartile range) or n (%). | |||
| Age, yrs | 71 (65–77) | 84 (82–88) | 0.001 |
| Male | 99 (65.1%) | 33 (46.5%) | 0.008 |
| Body mass index, kg/m2 | 26.3 (24.2–30.1) | 26.4 (24.2–30.9) | 0.924 |
| Vital signs on admission | |||
| Body temperature, °C | 36.0 (35–36.5) | 36.1 (35.5–36.6) | 0.398 |
| Heart rate, beats/min | 87 (71–109) | 82 (65–109) | 0.219 |
| Systolic blood pressure, mmHg | 110 (94–133) | 106 (88–130) | 0.618 |
| Respiratory rate, breaths/min | 20 (16–23) | 20 (17–25) | 0.384 |
| Cardiovascular risk factors | |||
| Arterial hypertension | 118 (77.6%) | 62 (87.3%) | 0.087 |
| Diabetes mellitus | 62 (40.8%) | 34 (47.9%) | 0.319 |
| Hyperlipidemia | 75 (49.3%) | 39 (54.9%) | 0.437 |
| Smoking | 65 (42.8%) | 11 (15.5%) | 0.001 |
| Prior medical history | |||
| Coronary artery disease | 60 (39.5%) | 34 (47.9%) | 0.653 |
| Congestive heart failure | 47 (30.9%) | 37 (52.1%) | 0.002 |
| Atrial fibrillation | 46 (30.3%) | 37 (52.1%) | 0.002 |
| Chronic kidney disease | 49 (32.2%) | 37 (52.1%) | 0.005 |
| Stroke | 23 (15.1%) | 10 (14.1%) | 0.837 |
| Chronic obstructive pulmonary disease | 38 (25.0%) | 9 (12.7%) | 0.036 |
| Liver cirrhosis | 7 (4.6%) | 0 | 0.066 |
| Medication on admission | |||
| Angiotensin-converting enzyme inhibitor | 58 (38.2%) | 25 (35.2%) | 0.672 |
| Angiotensin II receptor blocker | 29 (19.1%) | 19 (26.8%) | 0.194 |
| Beta-blocker | 76 (50.0%) | 50 (70.4%) | 0.004 |
| Angiotensin receptor neprilysin inhibitor | 6 (3.9%) | 1 (1.4%) | 0.311 |
| Aldosterone antagonist | 25 (16.4%) | 10 (14.1%) | 0.651 |
| Diuretics | 61 (40.1%) | 46 (64.8%) | 0.001 |
| Acetylsalicylic acid | 48 (31.6%) | 23 (32.4%) | 0.903 |
| P2Y12 inhibitor | 14 (9.2%) | 5 (7.0%) | 0.589 |
| Statin | 77 (50.7%) | 33 (46.5%) | 0.561 |