| 
      
        |  | H1N1 (n=5)
 | Other diagnostics (n=124) | P |  
        | n (%) | n (%) |  
        | Clinical characteristics |  
        | Age (years) | 60,8±10,4 | 72,2±10 | 0,015 |  
        | height (cm) | 170±4,1 | 163±6,5 | 0,058 |  
        | Obesity | 1 (20) | 4 (3,2) | 0,238 |  
        | Non smoker (years) | 3±3 | 8,97±10,2 | 0,06 |  
        | Hospitalization last year (n) | 2 (40) | 16 (12,9) | 0,143 |  
        | Grade obstruction (FVC/FEV1 post BD)
 | 43±3,5 | 49,6±13,5 | 0,019 |  
        | Episode clinical |  
        | Peak temperature (ºC) | 38,4±0,67 | 37,1±1 | 0,027 |  
        | Congestion | 2 (40) | 10 (8) | 0,068 |  
        | Headache | 2 (40) | 3 (2,4) | 0,020 |  
        | Laboratory data |  
        | Total lymphocytes (mm3) | 912±379 | 1498±2198 | 0,036 |  
        | Hematocrit (%) | 46,5±2,6 | 42,3±4,7 | 0,02 |  
        | Treatment |  
        | Inhaled corticoids | 3 (60) | 27 (21,7) | 0,084 |  
        | Antipyretics | 5 (100) | 53 (42,7) | 0,017 |  
        | Mechanical ventilation | 2 (40) | 7 (5,6) | 0,039 |  
        | Clinical evolution |  
        | Early evaluation Failure
 Improvement
 | 1 (20) 3 (60)
 | 1 (0,8) 113 (91,1)
 | 0,030 |  
        | Clinical failure No
 Respiratory failure
 | 2 (40) 3 (60)
 | 115 (92,7) 6 (4,8)
 | 0,011 |  
        | ICU admission | 2 (40) | 7 (5,6) | 0,039 |  
        | Change of antibiotics |  
        | No change | 1 (20) | 78 (62,9) | 0,014 |  
        | Resistance | 0 (0) | 10 (8) |  
        | Empiric | 3 (60) | 35 (28,2) |  |