Perception of symptoms according to past medical history
| Past medical history | Angina | Indigestion | No idea | Other | MI | Total |
| MI ± angina | 18 (26) | 9 (13) | 5 (7) | 9 (13) | 28 (41) | 69 (22) |
| Angina alone | 18 (30) | 15 (24) | 12 (20) | 9 (15) | 7 (11) | 61 (20) |
| No cardiac history | 8 (4) | 59 (32) | 41 (22) | 48 (26) | 27 (15) | 183 (58) |
| Total | 44 (14) | 83 (27) | 58 (18) | 66 (21) | 62 (20) | 313 (100) |
Values are n (%).
MI, myocardial infarction.