Background: Percutaneous dilation tracheostomy is an aerosol-generating procedure carrying a documented infectious risk during respiratory virus pandemics. For this reason. during the COVID-19 outbreak. surgical tracheostomy was preferred to the percutaneous one. https://jhtstrt7nvvz.nizarblog.com/35080250/implementation-of-data-mining-prediction-delivery-time-using-linear-regression-algorithm