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Table 6 Comparison of characteristics in each group of risk score for non-elderly patients with community-acquired pneumonia

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)

  1. Definition of abbreviations: SD standard deviation
  2. Data are n (%) of patients, unless noted otherwise
  3. aEach risk factor (requires help with feeding, malignancy, confusion, low blood pressure, and age 40–64) receives one point. A total point score for each patient is obtained by summing the points
  4. bThe pneumonia severity was evaluated using the A-DROP scoring system, which assesses confusion, dehydration (the existence of a clinical sign of dehydration or blood urea nitrogen level ≥210 mg/L), respiratory failure (SpO2 ≤ 90 % or PaO2 ≤ 60 mmHg), and a low blood pressure (systolic blood pressure ≤90 mmHg). Scoring: 0 = mild, 1–2 = moderate, 3 = severe, and 4 = extremely severe
  5. cThe percentages are not equal to 100 % because other bacterial or viral and unspecified bacterial pneumonia are excluded from this table