Table 1.
Sociodemographic and clinical characteristics at admission of infants included in the study
| n = 445 | |
|---|---|
| Sex (% male) | 260 (58.4) |
| Gestational age (weeks) | 39 [37–40] |
| Birth weight (grams) | 3100 [2745–3440] |
| Weight at admission (Kilograms) | 5.2 [4.2–6.5] |
| Age at admission (months) | 2.5 [1.4–4.6] |
| Prematurity (%) | 67 (15.1) |
| Type of delivery (% caesarean section) | 143 (32.1) |
| Patients with at least 1 comorbidity (%) | 35 (7.9) |
| Underlying disease (%) | |
|
Chronic lung disease Airway anomaly Congenital heart disease Central nervous system disorder Neuromuscular disease Down syndrome Others |
4 (0.9) 2 (0.5) 24 (5.4) 6 (1.3) 2 (0.5) 3 (0.7) 2 (0.5) |
| Family history of atopy (%) | 84 (18.9) |
| Personal history of atopy (%) | 33 (7.4) |
| Siblings (%) | 289 (64.9) |
| Feeding modality (%) | |
|
Breastfeeding Formula feeding |
251 (56.4) 180 (40.4) |
| Fever (%) | 222 (49.9) |
| Food refusal (%) | 257 (57.8) |
| Apneas (%) | 25 (5.6) |
Categorical variables expressed as absolute frequency and percentage, and quantitative variables as median and interquartile range [IQR].