Table 2 Comparison of variables relating to acute myocardial infarction event for ambulance and non‐ambulance users.
| Variable | Ambulance (48) | Non‐ambulance (57) | p Value |
|---|---|---|---|
| n (%) | n (%) | ||
| After hours (presentation on weekendor between 17:00 and 07:59) | 40 (83.3) | 39 (68.4) | 0.054 |
| Weekend | 16 (33.3) | 8 (14.3) | 0.022 |
| Risk factors | |||
| Smoking | 21 (43.8) | 34 (59.6) | 0.104 |
| Hypertension | 28 (58.3) | 31 (54.4) | 0.685 |
| Lipids | 21 (43.8) | 25 (43.9) | 0.991 |
| Family history | 18 (37.5) | 18 (31.6) | 0.524 |
| Overweight | 14 (29.2) | 12 (21.1) | 0.337 |
| Diabetes | 10 (20.8) | 15 (26.3) | 0.511 |
| Previous IHD event | 21 (43.8) | 16 (28.1) | 0.094 |
| Prior AMI | 9 (18.8) | 11 (19.3) | 0.844 |
| Type of symptoms | |||
| CP | 34 (70.8) | 43 (75.4) | 0.595 |
| Nausea | 17 (35.4) | 22 (38.6) | 0.737 |
| Vomiting | 12 (25.0) | 6 (10.5) | 0.05 |
| Neck pain | 9 (18.8) | 7 (12.3) | 0.358 |
| Dizziness | 8 (16.7) | 6 (10.5) | 0.356 |
| Arm pain | 26 (54.2) | 30 (52.6) | 0.875 |
| Shortness of breath | 18 (37.5) | 25 (43.9) | 0.509 |
| Sweating | 16 (33.3) | 18 (31.6) | 0.848 |
| CP type* | |||
| Tightness | 10 (20.8) | 10 (17.5) | 0.669 |
| Dull | 2 (4.2) | 6 (10.5) | 0.221 |
| Heavy | 10 (20.8) | 12 (21.1) | 0.978 |
| Sharp | 12 (25.0) | 4 (7.0) | 0.011 |
| Burning | 4 (8.3) | 7 (12.3) | 0.751 |
| Stabbing | 2 (4.2) | 5 (8.8) | 0.45 |
| Cramp‐like | 4 (8.3) | 6 (7.5) | 0.751 |
| CP in the ED | 27 (56.3) | 33 (57.9) | 0.865 |
| STEMI | 22 (45.8) | 24 (42.1) | 0.701 |
| Anginine at home | 13 (27.1) | 4 (7.0) | 0.007 |
| CP onset at home | 41 (85.4) | 38 (66.7) | 0.027 |
| Other person present | 33 (68.8) | 44 (77.2) | 0.33 |
AMI, acute myocardial infarction; CP, chest pain; ED, emergency department; IHD, ischaemic heart disease; STEMI, ST‐elevation myocardial infarction.
*Not all patients were able to describe characteristics of chest pain.