Table 3. Distribution of prodromal symptoms and the duration of symptoms by age.
A P-value of <0.05 was considered statistically significant. Data presented as N (%)
*Based on patients with prodromal symptoms
| Age | P-value | |||
| <40 years | 41-60 years | >60 years | ||
| Total (N) | 21 | 157 | 64 | - |
| Prodromal symptoms | 10 (47.6%) | 59 (37.6%) | 31 (48.4%) | 0.274 |
| *Symptom type | ||||
| Chest pain (mild) | 7 (70%) | 42 (71.2%) | 19 (61.3%) | 0.627 |
| Chest heaviness | 6 (60%) | 21 (35.6%) | 17 (54.8%) | 0.122 |
| Chest burning | 3 (30%) | 15 (25.4%) | 9 (29%) | 0.912 |
| Other types of pain | 2 (20%) | 6 (10.2%) | 3 (9.7%) | 0.630 |
| Palpitation | 3 (30%) | 23 (39%) | 16 (51.6%) | 0.370 |
| Unusual fatigue | 1 (10%) | 9 (15.3%) | 13 (41.9%) | 0.010 |
| Sleep disturbance | 3 (30%) | 16 (27.1%) | 3 (9.7%) | 0.134 |
| Shortness of breath | 3 (30%) | 22 (37.3%) | 9 (29%) | 0.706 |
| Lightheadedness or dizziness | 0 (0%) | 8 (13.6%) | 2 (6.5%) | 0.305 |
| Anxiety | 4 (40%) | 13 (22%) | 6 (19.4%) | 0.388 |
| Sudden heat or flushing or a cold sweat | 2 (20%) | 11 (18.6%) | 10 (32.3%) | 0.336 |
| Sudden back pain that is not related to an injury or exertion | 1 (10%) | 10 (16.9%) | 11 (35.5%) | 0.082 |
| Sudden nausea or vomiting or unexplained indigestion | 1 (10%) | 13 (22%) | 10 (32.3%) | 0.307 |
| *Duration of symptom | ||||
| 1 week | 2 (20%) | 18 (30.5%) | 12 (38.7%) | 0.650 |
| 2 weeks | 4 (40%) | 16 (27.1%) | 6 (19.4%) | |
| 4 weeks | 2 (20%) | 6 (10.2%) | 2 (6.5%) | |
| More than a month | 2 (20%) | 19 (32.2%) | 11 (35.5%) | |