P095 Clinical and polysomnographic characteristics of Indigenous and non-Indigenous children undergoing adenotonsillectomy with clinically suspected sleep disorders at the Top End Northern Territory of Australia

Sleep apnoea and poor sleep quality are growing public health issues which may begin in childhood and progress to significant lifelong morbidity. Literature regarding the prevalence of surgery for obstructive sleep apnoea (OSA) among Indigenous Australian children however is sparse. Children and polysomnographic (PSG) characteristics among children undergoing adenotonsillectomy (AT) for clinically suspected sleep-disordered breathing were assessed in this retrospective study. Paediatric patients Indigenous and non-Indigenous children referred for a diagnostic (PSG) via ENT service at the Top End Northern Territory of Australia for a sleep study between 2016 and 2020 were included. Of the 375 patients referred through an ENT service for a diagnostic PSG, 115 were identified to have undergone an AT and were included. The majority of patients were male (58%) and non-Indigenous (88%), in the normal weight category (64%) with a median age of 4.1 years. The median reported PDSS was 12, and snoring was reported in 77% of patients, with witnessed apnoeas in 31% and excessive daytime sleepiness in 23%. Most patients were identified to have OSA on PSG (65%, median AHI 1.6, 64% mild, 12% moderate, 23% severe). Median sleep efficiency was 85%, with a total sleep time of 520 minutes and WASO of 74 minutes. Total average SpO2 was a median of 93.5% and SpO2 Nadir 85%. We discuss how our findings can translate to future service planning and delivery whilst respecting cultural safety and indigenous group engagement.