Severe bronchiolitis group (n=85) Mild-moderate bronchiolitis group (n=355)
p
Sex (male/female)a 51 /34 226 /129 0.530
Age (months)b 6.50±6.06 6.07±4.72 0.482
Weight-for-age z-scoreb -0.87±1.54 -0.30±1.16 <0.001*
Birth weekb 38.24±2.69 (28-41) 38.39±2.37 (24-42) 0.602
Cesarean deliverya 43 (50.6%) 163 (45.9%) 0.469
Feeding typec 0.263
Mother’s milk only
63 (74.1%)
267 (75.2%)
Mother’s milk + additional food
19 (22.4%)
84 (23.7%)
Formula milk only
3 (3.5%)
4 (1.1%)
History of atopic diseasec 0.073
Gastroesophageal reflux disease 1 (1.2%) 12 (3.4%) 0.478
Hospitalization in neonatal intensive care 30 (35.3%) 89 (25.1%) 0.059
Number of bronchiolitis attacks 1.59±1.02 (1-5) 1.34±0.64 (1-4) 0.004*