Baseline factors, 30 day fatality, and survival owing to treatment in relation to time from onset of symptoms to coming under ambulance care
| Delay (hours) | |||
|---|---|---|---|
| ⩽ 1 | > 1, ⩽ 2 | > 2, ⩽ 4 | |
| No of cases (%) | 612 (34) | 401 (22) | 324 (18) |
| Age (years) (SD) | 62 (10) | 63 (9) | 63 (9) |
| Female (%) | 23 | 29 | 29 |
| Out of hospital arrest (%) | 14 | 3 | 1 |
| 30 day fatality/1000 | 173 | 122 | 133 |
| Survival owing to treatment/1000 (95% CI) | 136 (109 to 163) | 99 (70 to 128) | 64 (34 to 100) |
CI, confidence interval.