Table 1

Main characteristics of study population

Characteristicn (%)
Total number of patients3523
Demographic data
 Mean (SD) age (years)65.5 (18.7)
 Male2218 (63)
 History of smoking963 (28)
 History of alcohol abuse581 (17)
Site of care
 Outpatients514 (15)
 Inpatients3009 (85)
  Ward2521 (72)
  ICU488 (14)
Comorbidities
 Chronic respiratory disease1599 (46)
 Chronic cardiovascular disease640 (18)
 Diabetes mellitus538 (16)
 Neurological disease555 (16)
 Chronic renal disease247 (7)
 Chronic hepatic disease154 (4)
Symptoms
 Cough2827 (81)
 Sputum2098 (61)
 Dyspnoea2327 (67)
 Chest pain1435 (41)
 Fever2824 (81)
 Median (IQR) duration of symptoms (days)4.0 (5.0)
Clinical, laboratory and radiographic findings
 Median (IQR) CRP (mg/dl)17.0 (19.3)
 Median (IQR) WBC count (×109/l)13.0 (8.3)
 Median (IQR) platelet count (×109/l)237.0 (115.0)
 Alveolar pattern infiltrates2920 (87)
 Multilobar involvement (≥2 lobes)844 (24)
 Pleural effusion485 (14)
 Median (IQR) length of hospital stay (days)6.0 (6.0)
  • CRP, C-reactive protein; ICU, intensive care unit; WBC, white blood cells.