Basal Characteristics Frecuency (n=197) %
Epidemiology Epidemiology Epidemiology
Female 79 40.1
Male 118 59.9
Breastfeeding (6 months) 90 45.7
Complete vaccination schedule (n=31) 8 4.1
Pathological personal history Pathological personal history Pathological personal history
Previous wheezing 92 46.7
Smoking parents 84 42.6
Gastroesophageal Reflux Disease 82 41.6
Previous bronchiolitis pictures 66 36.5
Prematurity (<34 weeks of pregnancy) 20 10.2
Low birth weight (<1500g) 15 7.6
Repeated airway infection (>3 per year) 67 34.0
Asthma 24 12.2
Obesity 9 4.6
Low weight 6 3.0
Immunosupression 3 1.5
Chromosomal syndromes 1 0.5
Steroid use 2 1.0
Renal disease 1 0.5
Signs and symptoms Signs and symptoms Signs and symptoms
Hyaline rhinorrhea 142 72.8
Fever 141 71.6
Productive cough 99 59.3
Oral intolerance 74 37.3
Dyspnea 27 13.7
Intercostal retractions 148 75.1
Pharyngeal hyperemia 138 70.1
Wheezing 108 54.8
Crackles 106 53.8
Thoracoabdominal dissociation 99 50.3
Nose flaring 87 44.2
Cyanosis 38 19.3
Oxygenation index at admission Oxygenation index at admission Oxygenation index at admission
Mild 76 38.6
Moderate 85 43.1
Severe 5 2.5
Bronchiolitis severity Bronchiolitis severity Bronchiolitis severity
Mild 149 75.6
Moderate 39 19.8
Severe 9 4.6
Clinical Presentation Clinical Presentation Clinical Presentation
Pneumonia 84 42.6
Pneumonia and isolation 46 23.4
Ventilator-associated pneumonia 3 1.5
Hospital-Acquired Pneumonia 2 0.5
Coinfections Coinfections Coinfections
Viruses 45 22.8
Rinovirus 21 10.7
Influenza H3N2 9 4.6
Parainfluenza 9 4.6
Influenza H1N1 PD09 1 0.5
Bacteria 46 23.4
S. pneumoniae 23 11.7
H. Influenzae 10 5.1
Bacterial after 48 hours of admission 4 2
E. coli 2 1
P. aeruginosa 1 0.5
S. aureus 1 0.5
Fungi 1 0.5
Aspergillus spp. 1 0.5