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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.