Table VI.

Wells scores for predicting PTP of PE

Wells	Score	Modified wells	Score
Clinical signs of DVT	3.0	Clinical signs of DVT	1.0
Recent surgery or immobilization	1.5	Recent surgery or immobilization	1.0
Heart rate > 100 beats/min	1.5	Heart rate > 100 beats/min	1.0
Previous VTE	1.5	Previous VTE	1.0
Hemoptysis	1.0	Hemoptysis	1.0
Malignancy	1.0	Malignancy	1.0
Alternative diagnosis less likely than PE	3.0	Alternative diagnosis less likely than PE	1.0

Wells score three-level: < 2 points – low; 2-6 points – intermediate; > 6 points – high. Wells score two-level: PE unlikely < 4 points; PE likely > 4 points. Simplified Wells score: PE unlikely < 1 point; PE likely – 1 point. PE – pulmonary embolism, PTP – pretest probability