0580 Predictors of PAP Compliance One Month After Bariatric Surgery

Abstract Introduction Obesity is a major risk factor for Obstructive sleep apnea (OSA). Bariatric surgery is a popular treatment modality for sustainable weight loss in obese patients with OSA. Meta-analysis of several randomized controlled trials and observational studies showed that bariatric surgery led to improvement in OSA severity but not cure. These patients will likely need continued treatment for OSA to minimize its complications. It is unclear what factors influence positive airway pressure (PAP) therapy adherence and compliance postoperatively. Our study aims to identify predictors of PAP compliance 1 month after bariatric surgery. Methods Patients who underwent bariatric surgery at our institution between April and October 2023 and had diagnosed obstructive sleep apnea were identified. The 140 patients were followed prospectively through surgery and 30-day post-surgery. Medical health records, polysomnography or home sleep study results, and on-line databases of PAP use were reviewed for each patient. We used Pearson correlation coefficient testing and t-test to examine potential predictors of PAP use in the 30-day post-operative period. Results There are statistically significant correlations (p 0.05) between post-surgical PAP use and use during 7 days of initial set up (r = 0.642), time spent below 90% SpO2 during sleep testing (r = 0.425), time spent below 88% SpO2 (r = 0.246), pre-operative STOP-BANG (r = 0.200), and time from sleep testing to surgery (r = 0.242). Pre-surgical AHI and having been evaluated by a sleep physician pre-operatively did not show statistically significant association with post-operative PAP use. Conclusion PAP use during 7 days of initial set up is highly predictive of 1-month post-operative PAP use and may serve as a valuable marker to intervene on those patients with low use to improve long-term PAP use. Patients who were diagnosed with OSA close to their surgery had lower PAP use, suggesting patients may benefit from more time to get used to the treatment before having surgery. Support (if any)