Table 1.

The summary of the variables being involved in each algorithm

Variables	Standard	Age-adjusted	YEARS	PERC	PEGeD
DVT signs	+	+	+	+	+
PE likely	+	+	+	–	+
HR	+	+	–	+	+
Recent immobilization or surgery	+	+	–	+	+
History of VTE	+	+	–	+	+
Hemoptysis	+	+	+	+	+
Cancer	+	+	–	–	+
One D-dimer cutoff value	+	–	–	–	–
Two D-dimer cutoff values	–	+	+	–	+
Age	–	+	–	+	–
SaO2	–	–	–	+	–
Oral hormone use	–	–	–	+	–

+ denotes that the variable is involved in the algorithm; − denotes that the variable is not involved in the algorithm; DVT Deep Venous Thrombosis, PE Pulmonary Embolism, HR Heart Rate, VTE Venous Thromboembolism, SaO2 Arterial Oxygen Saturation