PAP Therapy Data provides a clue to Co-Morbid Sleep Disorders Positive airway pressure (PAP) usage data is integral to the management of patients with sleep disordered breathing. In follow-up visits, sleep physicians typically review residual apnea-hypopnea index (AHI), average pressure settings, and hours of usage to determine efficacy of PAP therapy for their patients. Remote monitoring of PAP therapy on cloud-based applications also allows for assessment of daily hours of usage and timing of usage, which can be utilized as surrogate markers for total sleep time and sleep routine, respectively. This longitudinal information about sleep habits can be helpful to evaluate for other co-morbid sleep disorders that may contribute to daytime sleepiness and are typically are evaluated using subjective sleep diaries or objective and less readily available actigraphy. Here, we present a series of cases in which PAP usage data revealed irregular sleep schedules, circadian rhythm disorders, and insomnia.

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