Comparison of emergency medical services time between the control and affected period
| Control period (Week 114 to 1) n=7087 | Affected period (Week 0 to 11) n=679 | p Value (control vs affected) | SMD (95% CI) | |
|---|---|---|---|---|
| Total EMS time (min) | ||||
| Median (IQR) | 31 (24–40) | 36 (27–52) | <0.001* | |
| Mean (SD) | 35 (17.4) | 43 (2.3) | <0.001† | 0.41 (0.40 to 0.43) |
| >60 min (%) | 584 (8.2) | 151 (22.2) | <0.001‡ | |
| Response time (min) | ||||
| Median (IQR) | 8 (6–10) | 8 (6–11) | <0.001* | |
| Mean (SD) | 8.5 (4.6) | 9.2 (5.3) | <0.001† | 0.17 (0.14 to 0.20) |
| On-scene time (min) | ||||
| Median (IQR) | 13 (10–18) | 15 (11–19) | <0.001* | |
| Mean (SD) | 15 (7.4) | 16 (8.5) | <0.001† | 0.13 (0.10 to 0.15) |
| Transport time (min) | ||||
| Median (IQR) | 7 (4–14) | 10 (5–23) | <0.001* | |
| Mean (SD) | 12 (13.2) | 18 (19.1) | <0.001† | 0.41 (0.39 to 0.43) |
*Mann–Whitney's U test.
†Welch's t-test.
‡χ2 test.
EMS, emergency medical services; SMD, standardised mean difference.