Table 2.

1-year mortality stratified by score points and risk categories

Severity score	Score points	Total	Mortality
		(n = 498)	n	%
CURB-65	0	72	3	4.2
	1	133	14	10.5
	2	177	56	31.6
	3	97	28	28.9
	4	18	5	27.4
	5	1	0	0.0
CRB-65	0	86	4	4.7
	1	248	54	21.8
	2	131	39	29.8
	3	30	8	26.7
	4	3	1	33.3
CCI	0	81	6	7.4
	1	114	14	12.3
	2	94	24	25.5
	3	81	25	30.9
	4	52	11	21.2
	5	43	17	39.5
	6	17	2	11.8
	7	8	3	37.5
	8	5	1	20.0
	9	3	3	100.0
Severity score	Score points	Total	Mortality
		(n = 498)	n	%
CURB-65	Low risk	205	17	8.3
	Intermediate risk	177	56	31.6
	High risk	116	33	28.4
CRB-65	Low risk	86	4	4.7
	Intermediate risk	379	93	24.5
	High risk	33	9	27.3
CCI	Low risk	195	20	10.3
	Intermediate risk	175	49	28.0
	High risk	128	37	28.9

Definition of risk categories:

CURB-65: low risk = 0-1 points, intermediate risk = 2 points, high risk = 3-5 points.

CRB-65: low risk = 0 points, intermediate risk = 1-2points, high risk = 3-4 points.

CCI: low risk = 0-1 points, intermediate risk = 2-3 points, high risk ≥ 3points.

Chi-square test for all associations: p < 0.001.