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Table 3 Multivariate analysis of clinical variables and biomarkers in prediction model for pneumonia in 249 patients presenting at radiology department with acute respiratory tract infection in primary care

From: Prediction model for pneumonia in primary care patients with an acute respiratory tract infection: role of symptoms, signs, and biomarkers

Diagnostic variableMultivariable OR (95%CI)P value
Age cohort (18–47 years is reference category) 0.54
• 48–631.74 (0.48–6.30) 
• ≥640.61 (0.05–8.07) 
Runny nose absent3.12 (1.22–8.00)0.02
Feel ill13.33 (2.80–63.40)0.00
Current smoker0.27 (0.06–1.19)0.08
Oxygen saturation0.94 (0.72–1.24)0.68
CRB-65 scorea (0 IS REFERENCE CATEGORY) 0.41
• 15.29 (0.46–61.15) 
CRP > 30 mg/l4.66 (1.73–12.55)0.00
  1. aCRB-65 severity score predicting 30 day mortality with higher score implicating higher 30 day mortality. C = new onset confusion, R = respiratory rate ≥ 30/min, B = Blood pressure (Systolic < 90 mmHg or Diastolic ≤60 mmHg), 65 = Age ≥ 65
  2. No values for CRB65 score of 2 since only 2 patients were present in that category