Journal
SLEEP
Volume 42, Issue 12, Pages -Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/sleep/zsz178
Keywords
obstructive sleep apnea; insomnia; COMISA; comorbid insomnia; cognitive and behavioral therapy for insomnia; continuous positive airway pressure therapy; adherence
Categories
Funding
- Philips Respironics
- Australian Research Council [FT120100510]
- Philips Respironics via the CRC for Alertness, Safety and Productivity
- Re-timer (Re-timer Pty Ltd, Adelaide, Australia)
- Australian Research Council [FT120100510] Funding Source: Australian Research Council
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Study Objectives: Insomnia and obstructive sleep apnea (OSA) commonly co-occur which makes OSA difficult to treat with continuous positive airway pressure (CPAP). We conducted a randomized controlled trial in participants with OSA and co-occurring insomnia to test the hypothesis that initial treatment with cognitive and behavioral therapy for insomnia (CBT-i), versus treatment as usual (TAU) would improve insomnia symptoms and increase subsequent acceptance and use of CPAP. Methods: One hundred and forty-five participants with OSA (apnea-hypopnea index >= 15) and comorbid insomnia were randomized to either four sessions of CBT-i, or TAU, before commencing CPAP therapy until 6 months post-randomization. Primary between-group outcomes included objective average CPAP adherence and changes in objective sleep efficiency by 6 months. Secondary between-group outcomes included rates of immediate CPAP acceptance/rejection, and changes in; sleep parameters, insomnia severity, and daytime impairments by 6 months. Results: Compared to TAU, participants in the CBT-i group had 61 min greater average nightly adherence to CPAP (95% confidence interval [CI] = 9 to 113; p = 0.023, d = 0.38) and higher initial CPAP treatment acceptance (99% vs. 89%; p = 0.034). The CBT-i group showed greater improvement of global insomnia severity, and dysfunctional sleep-related cognitions by 6 months (both: p < 0.001), and greater improvement in sleep impairment measures immediately following CBT-i. There were no between-group differences in sleep outcomes, or daytime impairments by 6 months. Conclusions: In OSA participants with comorbid insomnia, CBT-i prior to initiating CPAP treatment improves CPAP use and insomnia symptoms compared to commencing CPAP without CBT-i. OSA patients should be evaluated for co-occurring insomnia and considered for CBT-i before commencing CPAP therapy.
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