High night-to-night variability in childhood obstructive sleep apnea severity

Area of Science:

• Pediatric Sleep Medicine
• Respiratory Medicine
• Clinical Diagnostics

Background:

• Overnight polysomnography (PSG) is the standard diagnostic tool for childhood obstructive sleep apnea (OSA).
• Night-to-night variability in PSG results is known in adults but poorly understood in pediatric populations.
• This study addresses the test-retest reliability of PSG in children diagnosed with moderate-to-severe OSA.

Purpose of the Study:

• To evaluate the test-retest reliability of polysomnography (PSG) in children with moderate-to-severe obstructive sleep apnea (OSA).
• To determine if a single PSG is sufficient for accurate diagnosis and management of pediatric OSA.

Main Methods:

• Secondary analysis of baseline and repeat PSG data from two pediatric clinical trials.
• Included children aged 4-18 years with moderate-to-severe OSA.
• Compared diagnostic PSG results obtained approximately 48 days apart.

Main Results:

• Twenty-seven children were analyzed (median age 8 years).
• A significant proportion (26%) showed mild or no OSA on repeat PSG.
• Poor correlation was found for key OSA metrics: apnea-hypopnea index (ICC 0.27), oxygen desaturation index (ICC 0.10), and hypoxic burden (ICC 0.45).

Conclusions:

• Polysomnography demonstrates poor test-retest reliability in children with moderate-to-severe OSA.
• Relying solely on a single night of PSG may lead to misdiagnosis or inadequate treatment planning for pediatric OSA.
• Further research into optimizing diagnostic protocols for pediatric OSA is warranted.