O071 Chronic non-cancer pain in patients attending a diagnostic sleep study

Abstract Introduction Chronic non-cancer pain (CNCP) is the leading cause of disability globally affecting 20% of adults in Australia. It is associated with poor sleep and increased substance use including prescription medications. This study aimed to determine its prevalence in patients attending a tertiary referral sleep laboratory and assess impact on sleep and the nature of substance use. Methods Participants (n=245, 112 females, 50.0 ± 15.3 years) completed in-lab overnight diagnostic polysomnography and validated pain and sleep questionnaires (including Brief Pain Inventory [BPI]). Pain questionnaires (BPI [Yes/No] and Pain Sleep Questionnaire [75+]) were used to indicate probable CNCP. Fifteen participants with CNCP completed an interview exploring pain and sleep. Results 59.6% indicated CNCP. Those with CNCP were more likely to be older (CNCP 51.6, Controls 47.6, p<0.05), female (p<0.001), had higher BMI (p=0.008) and to rate sleep as fairly or very bad (p<0.05). Participants with BPI interference 5+ (clinically significant) had a higher AHI (p=.028), increased REM latency (p<0.001) and %REM sleep (p<.001). Interviewees indicated poor sleep to be a consequence of pain. Nine described misusing medication including taking more than prescribed (2), medication prescribed to someone else (5), pain medication for sleep (3), and six misusing alcohol (6). Discussion CNCP prevalence in patients attending for a diagnostic sleep study is triple that of the general population. There is concern regarding misuse of prescription medication and alcohol in people with sleep disturbance and CNCP. Consideration should be given to an interdisciplinary approach to pain and sleep management.