From: A mortality prediction rule for non-elderly patients with community-acquired pneumonia
 | Risk score for non-elderly patientsa | |||||
---|---|---|---|---|---|---|
Characteristic | 0 | 1 | 2 | 3 | 4 | 5 |
No. of patients | 11,297 (100.0) | 23,670 (100.0) | 10,926 (100.0) | 3,099 (100.0) | 354 (100.0) | 24 (100.0) |
Personal characteristics | ||||||
 Female sex | 5,928 (52.5) | 10,464 (44.2) | 3,929 (36.0) | 870 (28.1) | 101 (28.5) | 8 (33.3) |
 Age, mean years ± SD | 30.0 ± 6.3 | 51.9 ± 11.4 | 56.0 ± 8.7 | 57.9 ± 6.6 | 59.1 ± 5.3 | 59.5 ± 5.5 |
 Body mass index (kg/m2), mean ± SD | 21.9 ± 4.7 | 21.9 ± 4.8 | 21.2 ± 4.9 | 20.1 ± 4.6 | 19.7 ± 4.3 | 18.1 ± 3.9 |
 Charlson comorbidity index, mean ± SD | 0.3 ± 0.6 | 0.7 ± 0.9 | 1.7 ± 1.6 | 1.9 ± 1.8 | 2.5 ± 2.0 | 3.5 ± 1.6 |
 Barthel index, mean ± SD | 97.7 ± 8.0 | 89.7 ± 25.4 | 63.1 ± 42.1 | 31.6 ± 38.9 | 16.4 ± 25.2 | 7.5 ± 16.5 |
Pneumonia severityb | ||||||
 Mild | 10,485 (92.8) | 19,996 (84.5) | 6,294 (57.6) | 319 (10.3) | 0 (0.0) | 0 (0.0) |
 Moderate | 812 (7.2) | 3,652 (15.4) | 4,500 (41.2) | 2,554 (82.4) | 194 (54.8) | 0 (0.0) |
 Severe | 0 (0.0) | 22 (0.1) | 121 (1.1) | 195 (6.3) | 67 (18.9) | 6 (25.0) |
 Extremely severe | 0 (0.0) | 0 (0.0) | 11 (0.1) | 31 (1.0) | 93 (26.3) | 18 (75.0) |
Pneumonia aetiologyc | ||||||
 Pneumococcal | 897 (7.9) | 2,345 (9.9) | 878 (8.0) | 246 (7.9) | 25 (7.1) | 1 (4.2) |
 Mycoplasmal | 2,813 (24.9) | 1,799 (7.6) | 362 (3.3) | 35 (1.1) | 1 (0.3) | 0 (0.0) |
 Influenza | 41 (0.4) | 79 (0.3) | 33 (0.3) | 12 (0.4) | 2 (0.6) | 0 (0.0) |
 Aspiration | 59 (0.5) | 860 (3.6) | 1,720 (15.7) | 855 (27.6) | 86 (24.3) | 6 (25.0) |
Outcome after hospitalisation | ||||||
 Died within 30 days | 2 (0.0) | 88 (0.4) | 270 (2.5) | 285 (9.2) | 76 (21.5) | 11 (45.8) |
 Length of stay (days), mean ± SD | 8.0 ± 5.6 | 12.1 ± 17.7 | 18.8 ± 29.1 | 30.2 ± 70.9 | 37.3 ± 155.3 | 29.2 ± 36.6 |
 ICU admission | 30 (0.3) | 160 (0.7) | 263 (2.4) | 181 (5.8) | 33 (9.3) | 1 (4.2) |