TABLE 3.
Prehospital time intervals stratified by index hospitalization mortality.
| Prehospital time interval (min) | Total (n = 365)a | Patients without mortality (n = 354)a | Patients with mortality (n = 11)a | Shift in locationb (95% CI) | p-valuec |
|---|---|---|---|---|---|
| FMC to PCI (n = 365) (PCI time - at patient) | 85 (73–99) | 84 (72–98) | 122 (91–138.5) | −29.0 (−51.0 to −9.0) | 0.004 |
| Dispatch time (n = 365) (dispatch - call received) | 1 (0–2) | 1 (0–2) | 1 (0–1.5) | 0.0001 (−1.0 to 1.0) | 0.84 |
| Response time (n = 365) (on scene - dispatch) | 9 (6–12) | 9 (6–12) | 10 (9–12.5) | −1.0 (−4.0 to 2.0) | 0.39 |
| Time to first ECG (n = 361) (12-lead ECG - at patient) | 4 (2–6) | 4 (2–6) | 4 (3.5–13) | −1.0 (−4.0 to 2.0) | 0.44 |
| Activation time (n = 327) (cath lab activation - 12-lead ECG) | 15 (8–23) | 15 (8–23) | 28 (9–48) | −10.9 (−31.0 to 1.0) | 0.10 |
| Scene time (n = 365) (depart scene - on scene) | 14 (12–18) | 14 (12–17) | 15 (13.5–22) | −2.0 (−6.0 to 1.0) | 0.16 |
| Transport time (n = 365) (at destination - depart scene) | 27 (22–33) | 26.5 (22–33) | 27 (19–30.5) | 1.0 (−4.0 to 7.0) | 0.67 |
| Total EMS time (n = 365) (at destination - on scene) | 41 (35–48) | 41 (35–48) | 42 (33–50) | −2.0 (−9.0 to 6.0) | 0.68 |
| Door to PCI time (n = 365) (PCI time - at destination) | 43 (33–57) | 42 (33–56) | 76 (55.5–97) | −30.0 (−49.0 to −12.0) | 0.001 |
Abbreviations: FMC, first medical contact; IQR, interquartile range; PCI, percutaneous coronary intervention.
a
Data are reported as median (IQR).
b
Hodges-Lehmann estimator for the shift in location of the distribution of times for patients with mortality compared to those without mortality.
c
Wilcoxon rank-sum test.