| Gender Male
 Female
 | n % 117 (54.2)
 99 (45.8)
 | 
      
        | Age years (n=216) mean    ± SD
 median    (min-max)
 | 68.79 ± 13.27 70 (17-96)
 | 
      
        | CURB-65 2
 3
 | n % 177 (75)
 39 (25)
 | 
      
        | PSI-stage 3
 4
 5
 | n % 197 (91.21)
 15 (6.94)
 4 (1.85)
 | 
      
        | WBC (/mm³) >10000
 <6000
 | n % 115 (53.3)
 101 (46.7)
 | 
      
        | ESR (mm/h) (n=216) mean ± SD
 median    (min-max)
 | 37.62 ± 23.54 32 (1-97)
 | 
      
        | CRP (mg/dl) (n=216) mean ± SD
 median    (min-max)
 | 61.59 ± 65.14 39.5 (0.18-360)
 | 
      
        | Serum Albumin (g/dl) (n=216) mean ± SD
 median    (min-max)
 | 3.63 ± 0.53 3.58 (2.25-5 07)
 | 
      
        | BUN/ Alb (n=216) mean ± SD
 median    (min-max)
 | 5.53 ± 3.58 4.3 (1.57-25.66)
 | 
      
        | paO2 (mmHg) (n=208) mean ± SD
 median    (min-max)
 | 61.08 ± 12.32 60 (32-107)
 |