Table 1.
Whole-cohort baseline characteristics
| Median age (years) (IQR) | 3.11 (1.39–6.02) |
| Age (years), n (%) | |
| <1 | 36 (16) |
| 1–2 | 45 (20) |
| 2–5 | 63 (29) |
| 5–10 | 45 (20) |
| 10–15 | 32 (14) |
| Female, n (%) | 96 (44) |
| Fever recorded, n (%) | 120 (55) |
| Median duration of fever (days) (IQR) | 3 (2–6) |
| Symptoms, n (%) | |
| Increased work of breathing | 202 (91) |
| Cough | 191 (87) |
| Wheeze | 112 (51) |
| Stridor | 13 (5.9) |
| Chest pain | 4 (1.8) |
| Antibiotics given before presentation? | |
| Yes, n (%) | 44 (20) |
| Amoxicillin | 18 |
| Amoxicillin/clavulanate | 2 |
| Cephalosporins | 10 |
| Macrolides | 10 |
| Other | 11 |
| Comorbid medical conditions | 174 (78) |
| Asthma | 89 |
| Other lung disease (including bronchopulmonary dysplasia) | 36 |
| Neurologic/neurodevelopmental | 52 |
| Genetic disease | 26 |
| Cardiac disease | 26 |
| Endocrine disorders | 13 |
| Tracheostomy | 13 |
| Chronic kidney disease | 7 |
| Immunodeficiency/immunosuppressant drugs | 5 |
| Haemoglobinopathies | 5 |
| Malignancy | 3 |
| Chronic liver disease | 1 |
| Other | 27 |
| Home ventilation/oxygenation, n (%) | 16 (7) |
| Mechanical ventilation | 7 |
| Noninvasive ventilation | 6 |
| Oxygen therapy without ventilation | 3 |
PICU, paediatric intensive care unit.