Table 2.

Outcomes of ITSA analyses.

	Coefficient	95% CI	p-Value
Impact of the protocol on in-hospital deaths (primary outcome)
Time change	−0.0036	−0.12 to 0.11	0.95
Level change	−1.49	−4.82 to 1.84	0.39
Trend change	−0.044	−0.22 to 0.14	0.63
Impact of the protocol on in-hospital deaths (according to sensitivity analysis of the primary outcome)
Time change	−0.035	−0.14 to 0.067	0.50
Level change	−1.18	−4.15 to 1.79	0.44
Trend change	−0.08	−0.239 to 0.079	0.33
TRISS	−54.1	−81.0 to −27.2	<0.001
Impact of the protocol on the number of IVR procedures (secondary outcome)
Time change	0.09	−0.03 to 0.21	0.151
Level change	8.01	4.48 to 11.53	<0.001
Trend change	−0.35	−0.54 to −0.17	<0.001

ITSA: interrupted time-series analysis, CI: confidence interval, TRISS: trauma and injury severity score.