Table 1.

Simplified pulmonary embolism severity index, according to [9]

Variable	Points
Age >80 years	1
History of cancer	1
History of heart failure or chronic lung disease	1
Pulse rate ≥110 bpm	1
Systolic blood pressure <100 mmHg	1
Oxygen saturation <90 % on room air	1

Patients with none of the clinical variable (i.e., total score of 0) are considered as low risk and have mortality and pulmonary embolism-related complication rates significantly lower as those with a score of ≥1