This study aimed to compare positive airway pressure (PAP) therapy compliance between patients with comorbid insomnia and sleep apnea (COMISA) and those with obstructive sleep apnea (OSA) alone.

It also assessed the influence of insomnia clinic visits on PAP compliance.

Patients diagnosed with OSA and initiated on PAP therapy between January 2012 and December 2021 were included.

The COMISA group (n=43) comprised patients with insomnia, while the control group (n=86) consisted of OSA patients without insomnia, matched 1:2 based on age and sex.

COMISA patients were further categorized into group A (n=20), with at least two insomnia clinic visits, and group B (n=23) with one or no visits. PAP compliance in each group was evaluated at 3 and 9 months.