Inclusion Criteria:  Patients aged 1 to 20 years with a suspicion of SDB or a high-risk of SDB due to their pathology and hospitalized at Necker Hospital for a sleep study Written informed consent  Exclusion Criteria:  No social insurance Significant psychomotor retardation Cooperation not possible Significant agitation Acute condition and/or temporary drug treatments that may interfere with the results of PSG (upper or lower airway infection) Patient under guardianship/curatorship