Definitions used in the present report
| Term | Definition |
| Temporal pattern of wheeze | |
| Episodic (viral) wheeze | Wheezing during discrete time periods, often in association with clinical evidence of a viral cold, with absence of wheeze between episodes |
| Multiple-trigger wheeze | Wheezing that shows discrete exacerbations, but also symptoms between episodes |
| Duration of wheeze | |
| Transient wheeze | Symptoms that commenced before the age of 3 yrs and are found (retrospectively) to have disappeared by the age of 6 yrs; transient wheeze may be episodic or multiple-trigger wheeze |
| Persistent wheeze | Symptoms that are found (retrospectively) to have continued until the age of ≥6 yrs; persistent wheeze may be episodic or multiple-trigger wheeze |
| Late-onset wheeze | Symptoms that start after the age of 3 yrs; late-onset wheeze may be episodic or multiple-trigger wheeze |