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Table 1 Characteristics of the 200 patients of the study

From: Diagnostic accuracy of C-reactive protein and procalcitonin in suspected community-acquired pneumonia adults visiting emergency department and having a systematic thoracic CT scan

  No (%) or mean ± SDa
Characteristics Total (n = 200)
General characteristics  
 Age  
  Mean age (years) 63.9 ± 19.1
   ≥ 65 years 108 (54.0)
 Sex  
  Female 99 (49.5)
  Male 101 (50.6)
 Nursing home resident 8 (4.0)
Background and vaccinations  
 Comorbidities  
  At least 1 comorbidity 102 (51.0)
  Chronic respiratory disease 57 (28.5)
  Congestive heart failure 16 (8.0)
  Kidney disease 13 (6.5)
  Neoplasia 18 (9.0)
  Liver disease 9 (4.5)
  History of stroke 7 (3.5)
 Vaccination status  
  Influenza vaccination during the past year 75 (37.5)
  Pneumococcal vaccination 27 (13.5)
Community-acquired pneumonia characteristics at inclusion  
 Previous antibiotic treatment 68 (34.0)
 Symptoms duration before visiting ED (days) 9.6 ± 10.9
 Signs and symptoms in the ED  
  Cough 153 (76.5)
  Chest pain 66 (33.0)
  Expectoration 96 (48.0)
  Dyspnea 142 (71.0)
  Chills 71 (35.5)
  Headaches 43 (21.5)
  Myalgia 45 (22.5)
  Crackles 65 (32.5)
  Fever 63 (31.5)
  Confusion 3 (1.5)
  Respiratory rate > 30/min 24 (12.0)
  Heart rate > 125/min 13 (6.5)
  Systolic blood pressure < 90 mmHg 4 (2.0)
Diastolic blood pressure < 60 mmHg 16 (8.0)
 Community-acquired pneumonia severity scores  
  PSI risk class  
   I 31 (15.5)
   II 61 (30.5)
   III 41 (20.5)
   IV 54 (27.0)
   V 13 (6.5)
 Biological data  
  White blood cell (103/mm3) 11.6 ± 5.0
  Urea > 11 mmol/L 23 (11.5)
  pH < 7.35 2 (1.0)
  PaO2 < 60 mmHg or Sat02 < 90 % 25 (12.5)
Biomarkers resultsa  
 CRP (mg/L)  
  In all patients (n = 200) 74.5 [21.6 - 150.8]
  In patients with a CAP classified as  
   « excluded » (n = 71) 23.4 [5.0 - 96.2]
   « possible » (n = 23) 48.6 [16.0 - 147.1]
   « probable » (n = 8) 78.8 [27.7 - 240.9]
   « definite » (n = 98) 125.1 [65.0 - 208.7]
 Procalcitonin (PCT) (μg/L)  
  In all patients (n = 200) 0.18 [0.07 - 0.91]
  In patients with a CAP classified  
   « excluded » (n = 71) 0.11 [0.06 - 0.42]
   « possible » (n = 23) 0.14 [0.07 - 0.63]
   « probable » (n = 8) 0.63 [0.06 - 1.41]
   « definite » (n = 98) 0.24 [0.11 - 1.38]
Community-acquired pneumonia management  
 Emergency physician's mean years in practice 5.8 ± 6.0
 28-day mortality 6 (3.0)
  1. Abbreviations: ED emergency department, PSI Pneumonia Severity Index, CRP C-reactive protein, CAP community-acquired pneumonia
  2. aResults are expressed as number (%) or mean ± standard deviation (SD) except for biomarker results expressed as median (IQR)