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Table 2 30-day mortality stratified by score points and risk categories

From: External validation of the CURSI criteria (confusion, urea, respiratory rate and shock index) in adults hospitalised for community-acquired pneumonia

Severity score

Score points

No. of patients

Mortality

  

N = 553

n

%

CRB-651

0

87

3

3.4

 

1

271

24

8.9

 

2

155

24

15.5

 

3

38

8

21.1

 

4

2

0

0

CURB-652

0

73

2

2.7

 

1

138

7

5.1

 

2

200

23

11.5

 

3

116

19

16.4

 

4

26

8

30.8

 

5

0

0

0

CURSI3

0

195

8

4.1

 

1

240

26

10.8

 

2

98

16

16.3

 

3

19

8

42.1

 

4

1

1

100

Severity score

Risk category

No. of patients

Mortality

  

N = 553

n

%

CRB-654

Low risk

87

3

3.4

 

Intermediate risk

426

48

11.3

 

High risk

40

8

20.0

CURB-655

Low risk

211

9

4.3

 

Intermediate risk

200

23

11.5

 

High risk

142

27

19.0

CURSI6

Low risk

435

34

7.8

 

High risk

118

25

21.2

  1. Definition of risk categories.
  2. CRB-65: low risk = 0 points; intermediate risk = 1–2 points; high risk = 3–4 points.
  3. CURB-65: low risk = 0–1 points; intermediate risk = 2 points; high risk = 3–5 points.
  4. CURSI: low risk = 0–1 points; high risk = 2–4 points.
  5. P-values according to chi-square test: 1p = 0.007; 2p < 0.001; 3p < 0.001; 4p = 0.014; 5p < 0.001; 6p < 0.001.