Comparison of characteristics of questionnaire responders and non-responders in four year survivors of a myocardial infarction
| Responders (n = 421) | Non-responders (n = 64) | p Value | |
|---|---|---|---|
| Median age (IQR) | 67 (59, 73) | 68 (56, 78) | 0.602 |
| Male | 278 (66.0) | 37 (57.8) | 0.253 |
| Previous myocardial infarction | 51 (12.1) | 10 (15.6) | 0.557 |
| Q wave myocardial infarct | 336 (79.8) | 47 (73.4) | 0.317 |
| Anterior infarction | 165 (39.2) | 18 (26.9) | 0.118 |
| Diabetes | 45 (10.7) | 7 (10.9) | 0.875 |
| Killip class | |||
| 1 | 278 (66.0) | 49 (76.6) | 0.126 |
| 2 | 124 (29.5) | 12 (18.8) | 0.104 |
| 3/4 | 17 (4.0) | 3 (4.7) | NA |
| Events after discharge (admissions) | |||
| Coronary revascularisation | 67 (15.9) | 4 (6.3) | 0.046 |
| Recurrent myocardial infarction | 46 (10.9) | 7 (10.4) | 0.832 |
| Possible infarction/unstable angina | 76 (18.1) | 10 (15.6) | 0.766 |
| Cardiac failure | 25 (5.9) | 3 (4.7) | NA |
Values are n (%) unless stated otherwise.
IQR, interquartile range; NA, not applicable (numbers too small for χ2 to be valid).