|  | Madrid | Andalusia | Overall | 
      
        | n=229 | n=324 | n=553 | 
      
        | Age, years |  |  |  | 
      
        | Mean (SD) | 4.2 (0.20) | 5.9 (0.29) | 5.2 (0.89) | 
      
        | Gender, (n (%))[1] |  |  |  | 
      
        | Male | 103 (45.0) | 161 (49.7) | 264 (47.7) | 
      
        | Female | 126 (55.0) | 163 (50.3) | 289 (52.3) | 
      
        | Concomitant vaccination, (n (%))a | 227 (99.1) | 4 (1.2) | 231 (41.8) | 
      
        | Haemophilusinfluenzae type b vaccines | 1 (0.4) | 0 (0.0) | 1 (0.4) | 
      
        | Measles vaccines | 226 (98.7) | 1 (25.0) | 227 (97.4) | 
      
        | Meningococcal vaccines | 0 (0.0) | 1 (25.0) | 1 (0.4) | 
      
        | Pneumococcal vaccines | 1 (0.4) | 0 (0.0) | 1 (0.4) | 
      
        | Poliomyelitis vaccines | 1 (0.4) | 0 (0.0) | 1 (0.4) | 
      
        | Varicella Zoster vaccines | 0 (0) | 2 (50.0) | 2 (0.9) | 
      
        | Disease on day of inclusion, (n (%))a |  |  |  | 
      
        | Acute disease | 6 (2.6) | 14 (4.3) | 20 (3.6) | 
      
        | Chronic disease | 24 (10.5) | 32 (9.9) | 56 (10.1) | 
      
        | Medication prior to inclusion[2], (n (%))a | 11 (4.8) | 5 (1.5) | 16 (2.9) | 
      
        | Concomitant medication, (n (%))a | 23 (10.0) | 33 (10.2) | 56 (10.1) | 
      
        | Medication used to treat ARs, (n (%))a | 36 (7.0) | 89 (13.5) | 125 (10.6) | 
      
        | Medication used to    treat ARs, (n (%))[3] |  |  |  | 
      
        | Antibiotics for topical use | 0 (0.0) | 2 (3.2) | 2 (2.1) | 
      
        | Antihistamines for systemic use | 1 (2.9) | 1 (1.6) | 2 (2.1) | 
      
        | Antiinflammatory and antirheumatic  products, NSAIDs | 21 (61.8) | 51 (82.3) | 72 (75.0) | 
      
        | Antivaricose therapy | 0 (0.0) | 1 (1.6) | 1 (1.0) | 
      
        | Corticosteroids for systemic use | 0 (0.0) | 2 (3.2) | 2 (2.1) | 
      
        | Corticosteroids | 1 (2.9) | 2 (3.2) | 3 (3.1) | 
      
        | Other analgesics and antipyretics | 10 (29.4) | 3 (4.8) | 13 (13.5) | 
      
        | Motility stimulants | 1 (2.9) | 0 (0.0) | 1 (1.0) |