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Table 6 Population and outcomes stratification according to the risk of early ICU admission index (REA-ICU index) of patients with community acquired pneumonia

From: Risk stratification of early admission to the intensive care unit of patients with no major criteria of severe community-acquired pneumonia: development of an international prediction rule

  

Derivation population

Validation population

Risk class

Score

N

ICU ≤ 3 days,

% (95% CI)

Death ≤ 28 days,

% (95% CI)

n

ICU ≤ 3 days,

% (95% CI)

Death ≤ 28 days,

% (95% CI)

I

≤ 3

2510

1.1

(0.7 to 1.6)

1.2

(0.8 to 1.8)

1099

1.3

(0.7 to 2.1)

1.9

(1.2 to 2.9)

II

4 to 6

1498

5.5

(4.4 to 6.8)

6.0

(4.8 to 7.3)

633

7.1

(5.2 to 9.4)

4.4

(3.0 to 6.3)

III

7 to 8

419

11.0

(8.2 to 14.4)

9.1

(6.5 to 12.2)

164

12.2

(7.6 to 18.2)

7.9

(4.2 to 13.2)

IV

≥ 9

166

27.1

(20.5 to 34.5)

15.1

(10.0 to 21.4)

71

32.4

(21.7 to 44.5)

22.5

(13.5 to 34.0)

Total

 

4593

4.4

(6.0 to 7.4)

4.0

(3.4 to 4.6)

1967

5.2

(5.8 to 8.0)

4.0

(3.1 to 4.9)

  1. ICU ≤ 3 days and death ≤ 28 days refer to patients who were admitted to an ICU within three days of presentation to the emergency department or who died within 28 days of presentation, respectively. Results are expressed as percentages of each outcome within each REA-ICU risk class. CI = confidence interval; ICU = intensive care unit.