Table 3. Incidence rates according to the severity of CRS1.

Comparison of rates (RR, 95% CI; p).

Event: Death during hospital stay
	No. events / Person-days to event	Incidence rate per 103 (95% CI)	RR	p
No CRS	49 /20446	2.4 (1.8–3.2)	1	-
CRS1 severity 1	0/391	0.0 (0.0–9.4)	0 (0.0–3.3)	0.395
CRS1 severity 2	7/549	12.8 (5.1–26.3)	5.3 (2.2–11.2)	<0.001
CRS1 severity 3	7/478	14.6 (5.9–30.1)	6.1 (2.6–12.9)	<0.001
CRS1 severity 4	50/1525	32.8 (24.3–43.2)	13.7 (9.2–20.3)	<0.001
Event: Death or readmission during the first year after discharge
	No. events / Person-days to event	Incidence rate per 103 (95% CI)	RR	p
No CRS	285/511184	5.6 (4.9–6.3)	1	-
CRS1 severity 1	8/7925	10.1 (4.3–19.9)	1.8 (0.9–3.7)	0.090
CRS1 severity 2	17/8757	19.4 (11.3–31.1)	3.5 (2.1–5.7)	<0.001
CRS1 severity 3	18/6653	27.1 (16.0–42.8)	4.9 (3.0–7.8)	<0.001
CRS1 severity 4	68/14177	48.0 (37.3–60.8)	8.6 (6.6–11.2)	<0.001