Table 2.

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.