Table 1.

Khorana Risk Score criteria for assessing venous thromboembolism in patients with cancer

Risk factor	Points		Present patient
Site of primary cancer
Very high risk (stomach, pancreas)	2
High risk (lung, lymphatic system, reproductive organs, bladder, testicular)	1
Low risk (all other sites)	0		0
Other characteristics
Platelet count ≥350,000/μl	1
Hemoglobin level < 10 g/dl or use of red cell growth factors	1
White blood cell count > 11,000/μl	1		1
Body mass index ≥35 kg/m2	1
Risk category	Score (Total points)	Risk of symptomatic VTE
High risk	≥3	7.1%
Intermediate risk	1 or 2	2.1%	1
Low risk	0	0.8%

VTE venous thromboembolism