“…The main risk factors that may affect haemorrhage rates after CTE will be collected in this study. [9][10][11][12][13][14][15][16][17][18][19][20] Risk factors due to the patient's own condition include, gender, age, body mass index, education status of the primary guardian, date of symptoms onset, parameters of polysomnography, concomitant symptoms other than sleep disorders, history of other systemic diseases, tonsil size, adenoid size, etc. Risk factors due to surgical intervention include surgery date, surgery time, intraoperative blood loss, use of suture haemostasis technique, use of medicine during anaesthesia, brand and model of plasma radiofrequency used in the operation, etc.…”