“…On the other hand, many studies have been conducted to select the most significant variables for predicting COVID-19 mortality from a clinical perspective. In these studies, the top 10 predictors or effective factors for the mortality of COVID-19 patients are advanced age (older age) [2-6, 55, 63, 65, 67], longer LOS [1-3, 6, 65], mechanical ventilation [4,7,55,[61][62][63], fever [1,2,6,55,61,62,65], decreased SPO 2 (low oxygen saturation) [35,49,51,60], elevated interlukin-6 [4,5,55,[61][62][63][64][65], high blood pressure [2, 4-6, 8, 55, 63, 64], leukocytosis [1,4,7,8,61,63,64], increased BUN [4,5,55,[61][62][63][64][65], cardiovascular [1, 2, 4-6, 8, 55, 61-65], and COPD [4,6,…”