0562 Associations of Insomnia Symptoms and Unhealthy Alcohol Use with Post-Operative Healthcare Utilization in Veterans Undergoing Decompressive Laminectomy for Lumbar Spinal Stenosis

Abstract Introduction Lumbar spinal stenosis (LSS) affects 11-39% of adults and contributes to significant pain and disability. Decompressive laminectomy (DL) is a common surgical intervention for LSS but many with medical and psychosocial comorbidities may not improve. Insomnia and unhealthy alcohol use, for example, are common among people living with chronic pain and may affect key laminectomy outcomes, such as healthcare utilization rates. We examined associations of self-reported rates of post-DL healthcare utilization in Veterans with insomnia symptoms and alcohol use. Methods We analyzed data from a multi-site prospective cohort study of Veterans with LSS undergoing DL. Participants (N=200) self-reported prior 12-month alcohol use behavior (Short Michigan Alcohol Screening Test; SMAST) and prior two-week insomnia symptoms (Insomnia Severity Index; ISI) prior to surgery; 12-months of post DL healthcare office visits, ER visits, hospitalizations, and mental health visits were reported over the telephone monthly. Negative binomial regression models via incident rate ratios (IRR) compared healthcare utilization rates between individuals reporting alcohol-related problems only (SMAST >2), insomnia symptoms only (ISI ≥ 8), and both to those reporting neither. Results Approximately 52% of participants reported insomnia symptoms, 75% unhealthy alcohol use, and 39% both. Rates of office, ER, and hospital visits were descriptively highest in those reporting insomnia only; mental health visits were highest in those with both insomnia and unhealthy alcohol use. Those with insomnia only had more ER (IRR=2.39, p=.04) and mental health visits (IRR=4.32, p=.03) than those with neither insomnia nor unhealthy alcohol use; individuals with both insomnia and unhealthy alcohol use also had more mental health visits (IRR=4.22, p=.01). Adjusting for covariates rendered IRRs attenuated and statistically nonsignificant, but magnitudes remained high. Conclusion Most Veterans with LSS reported insomnia symptoms and/or unhealthy alcohol use. Those with insomnia symptoms reported the highest rates of healthcare utilization, including higher rates of ER and mental health visits. Insomnia symptoms may contribute to post-operative healthcare utilization, lending support for assessment and intervention of sleep-related problems pre-laminectomy. Support (If Any) This material is based on work supported by the Department of Veterans Affairs, Veterans Health Administration, Office of Research and Development, grant # RX000798. Dr. Tighe is supported by Career Development/Capacity Building Award Number IK2 RX003393 from the United States (U.S.) Department of Veterans Affairs Rehabilitation R&D (Rehab RD) Service. Dr. Bachrach is supported by a U.S. Department of Veterans Affairs Health Services Research and Development Service (HSR&D) Career Development Award (CDA 20-057).