Hence, to differentiate a patient with PTE from one with pneumonia, Equation (15) is suggested by the decision tree algorithm.(15)Condition=PTE,ifTN≤78.20and((UTI≤67.41andSat≤98)or(UTI>67.41andUr<10.043))Pneumonia,ifTN>78.2andPlat>153.0andPT>11.3where TN = “total neutrophils”, UTI = “ultrasensitive troponin I”, “Sat = saturation”, Ur = “urea”, Plat = “platelets”, and PT = “prothrombin time”. Here, F2 is linked to bacterial urinary tract infection.