P131 Factors associated with Referral to Sleep Clinic and Diagnosis of Obstructive Sleep Apnoea in Pregnant People with Class III Obesity

BACKGROUND: Obstructive Sleep Apnoea (OSA) in pregnancy is associated with increased maternal and neonatal morbidity. Evidence supporting use of traditional screening tools (e.g. Epworth Sleepiness Scale and STOP-BANG) in pregnancy is inconsistent, especially for people with class III obesity. This study aims to determine factors associated with referral to sleep clinic and diagnosis of OSA in pregnant people with class III obesity. METHOD: Retrospective audit of records for people with class III obesity seen in high-risk pregnancy clinic at Canberra Hospital between 1/7/20 and 30/6/21. It will a) describe patient factors associated with referral to sleep clinic and b) describe patient factors associated with diagnosis of OSA (apnoea-hypopnoea index ≥5). PROGRESS TO DATE: Approval to proceed as quality improvement project by ACT Health Ethics Committee. Data collection will be completed in 4-8 weeks. Preliminary results will be available by September-October 2022. INTENDED OUTCOME AND IMPACT: Clinical parameters associated with sleep clinic referral will be presented and compared to existing evidence. Initial data screening suggests that referral rates to sleep clinic are low and reasons for this will be explored. Clinical features associated with a diagnosis of OSA in those who proceeded for polysomnography will also be presented. Our results will inform local practice to determine if pregnant people with class III obesity are being appropriately referred to sleep clinic and objectively assessed for OSA. Our research will add to the limited research in this area and inform further prospective studies on effective screening in this population.