| Parameter | Scoring | |
|---|---|---|
| Length of stay | <24 hours | 0 |
| 1–5 days | 1 | |
| >5 days | 2 | |
| Respiratory support | CPAP/Vapotherm | 2 |
| Mechanical ventilation | 3 | |
| Risk factors for severe bronchiolitis | 1 risk factor | 1 |
| >1 risk factor | 2 | |
| Virology | Non-RSV monoinfection | 1 |
| RSV monoinfection | 2 | |
| Non-RSV+ other | 2 | |
| RSV + other | 3 |
Mild: 0–3, Moderate: 4–7, Severe:>7