Inclusion Criteria: | Â |
 1. Children aged 3–5 years at the time of primary assessment for evaluation of snoring |  |
 2. Deemed suitable for adenotonsillectomy on surgical evaluation |  |
 3. Confirmed on PSG to have mild-moderate OSA, defined as OAHI < 10 events/h |  |
Exclusion Criteria: | Â |
 1. Medical conditions known to affect neurocognitive development (including hearing loss >35DB) |  |
 2. Previous tonsillectomy or airway surgery |  |
 3. High risk genetic and craniofacial syndromes |  |
 4. Previously identified neurodevelopmental conditions |  |
 5. Cyanotic heart disease or previous cardiopulmonary bypass |  |
 6. Conditions that preclude neurocognitive testing or that preclude adenotonsillectomy |  |
 7. Confirmed on PSG to have severe OSA, define as OAHI >10/h |  |