0491 Exploring COMISA, Sleep-related Symptoms, and Healthcare Utilization in Military Personnel

Abstract Introduction Insomnia and obstructive sleep apnea (OSA) are the two most common sleep disorders seen in clinical practice. Comorbid insomnia and OSA (COMISA) is a very common clinical presentation. The purpose of this study was to estimate the effect of COMISA on sleep, daytime symptoms, and healthcare resource utilization compared to OSA or insomnia alone among military personnel. Methods Military personnel with sleep problems were recruited from two military treatment facilities. Insomnia and OSA were defined using validated cutoffs on the Insomnia Severity Index and Berlin Questionnaire, respectively, and COMISA was defined as comorbid insomnia and OSA. Subjective and objective sleep were measured via standardized sleep diaries and a commercial wearable (Fitbit Inspire 2) over ten days. Daytime symptoms (e.g., sleepiness, depression, anxiety, pain) were assessed using standardized self-report questionnaires. Subjective cognition was assessed via three Likert items. Healthcare resource utilization (HCRU) was assessed using an established questionnaire tailored for this study. To compare differences between COMISA, OSA, and insomnia groups, one-way ANOVA was performed. Results The final sample included 201 participants (n=113, 43.8% men, mean age=44.5 SD=12.7) who self-reported being of White (111, 55.2%), Black (50, 24.9%), Hispanic (21, 10.5%) or Other (19, 9.5%) race. Of these, 22 (10.9%) were categorized as insomnia alone, 98 (48.8%) as OSA alone, and 81(40.3%) as COMISA. Relative to individuals with OSA, individuals with COMISA demonstrated worse subjective (but not objective) sleep; worse subjective daytime symptoms; worse subjective memory, attention, and executive function; and increased healthcare utilization including total HCRU and outpatient visits to internal medicine, neurology, emergency department, and urgent care. Some but few significant differences were observed between participants with insomnia relative to those with COMISA. Conclusion Among military personnel with sleep problems and relative to OSA alone, COMISA was associated with worse subjective sleep, worse daytime symptoms, worse subjective cognition, and greater HCRU. Future research should seek to seek to improve health and economic outcomes among individuals with COMISA. Support (if any) DoD (W81XWH1990006 via the Medical Technology Enterprise Consortium)