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Table 1 Baseline characteristics of the cohort

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

Total number of patients249
Female (%)127 (51.0)
Median age in years (IQR)56 (43–67)
Duration of complaints:
 - Less than a week (%)45 (18.1)
 - Between 1 and 2 weeks (%)104 (41.8)
 - Between 2 and 3 weeks (%)97 (39.0)
Comorbidity (%)196 (78.7)
Hospital admission in previous year (%)32 (12.9)
Received influenza vaccination (%)108 (43.4)
Antibiotic usage previous 3 months (%)
 - None121 (48.6)
 - One course95 (38.2)
 - More than one course33 (13.3)
Antibiotic courses (%)
 - Amoxicillin48 (29.6)
 - Amoxicillin with clavulanic acid7 (4.3)
 - Penicillin5 (3.1)
 - Doxycycline38 (23.5)
 - Macrolide14 (8.6)
 - Quinolone3 (1,9)
 - Other4 (2.5)
 - Unknown antibiotic43 (26.5)
Smoking (previous or current) (%)141 (56,6)
Median CRB-65 scorea (IQR)0 (0–1)
  1. IQR interquartile range
  2. 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