• Daniel I Rhon, Suzanne J Snodgrass, Joshua A Cleland, and Chad E Cook.
• Center for the Intrepid, Brooke Army Medical Center, Joint Base San Antonio Fort Sam Houston, TX; Doctoral Program in Physical Therapy, Baylor University, Joint Base San Antonio Fort Sam Houston, TX; College of Health Sciences, University of Newcastle, Callaghan, Australia.
• Pain Physician. 2019 Jul 1; 22 (4): E351-E360.

BackgroundThere is a relationship between sleep, pain, and chronic opioid utilization. This has been poorly explored in general, and especially in patients undergoing orthopaedic surgery. Fewer studies have investigated this relationship based on a sleep diagnosis present both before and after surgery.ObjectivesTo identify the association between insomnia and sleep apnea and downstream opioid use and medical utilization (visits and cost) in the 2 years following arthroscopic hip surgery.Study DesignA retrospective cohort.SettingThe US Military Health System.MethodsThis was a consecutive cohort of individuals undergoing hip arthroscopy in the Military Health System (MHS). Medical utilization data were abstracted from the MHS Data Repository between 2003 and 2015, representing 1 year prior and 2 years after surgery for every individual. Sleep disorder diagnoses (insomnia and sleep apnea) were identified using International Classification of Disease codes, and opioid utilization was determined from pharmacy data based on American Hospital Formulary Service codes 280808 and 280812. Sleep disorders present before surgery were used as predictors in multivariate logistic regression, and sleep disorders present after surgery were examined for associations with the outcomes using the Chi-square tests. The dependent variables in both cases were downstream medical utilization (costs, visits, and opioid use).ResultsOf 1870 eligible patients (mean age 32.3 years; 44.5% women), 165 (8.8%) had a diagnosis of insomnia before surgery and 333 (17.8%) after surgery; whereas 93 (5.0%) had a diagnosis of apnea before surgery and 268 (14.3%) after surgery. A diagnosis of insomnia before surgery predicted having at least 3+ opioids prescriptions after surgery (adjusted odds ratio, 1.97 [95% confidence interval, 1.39, 2.79]) and greater downstream total medical visits and costs in the 2 years after surgery. However, the number of individuals with a diagnosis of insomnia or apnea after surgery more than doubled, and was significantly associated with chronic opioid use, all-cause medical and all hip-related medical downstream visits and costs in the 2 years after surgery.LimitationsThe use of observational data and claims data are only as good as how it was entered.ConclusionsSleep disorders prior to surgery predicted chronic opioid use and medical utilization after surgery. However, a much higher rate of individuals had sleep apnea and insomnia present after surgery, which were significantly associated with chronic opioid use and greater total and hip-related medical utilization (visits and costs). Screening for sleep disorders prior to surgery may be important, but an even higher rate of sleep disorders may be developed after surgery, and continued screening after surgery may have greater clinical merit. Assessing quality of sleep during perioperative management may provide a unique opportunity to decrease pain and chronic opioid use after surgery.Key WordsPain, opioid use, insomnia, sleep apnea, orthopaedic surgery, military medicine, health care utilization.

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