Table 1. Laboratory risk factors for... | American Society of Hematology

Table 1.

Laboratory risk factors for thrombosis in 109 women with a history of VTE

Risk factors	Abnormality/total	Percentage
None	39 of 101^*	39.0
Heterozygous factor V:R506Q	38 of 109	35.0
Homozygous factor V:R506Q	5 of 109	4.6
Heterozygous G20210A prothrombin	8 of 107	7.5
Antithrombin deficiency	2 of 109	1.8
Protein C deficiency	5 of 109	4.6
Protein S deficiency	5 of 109	4.6
Hyperhomocystinemia	11 of 101	11.0
Elevated factor VIII	12 of 102	12.0
Lupus anticoagulant	3 of 109	2.8
Of these
Two risk factors combined	13 of 101^*	13.0
Three risk factors combined	3 of 101^*	3.0

Risk factors	Abnormality/total	Percentage
None	39 of 101^*	39.0
Heterozygous factor V:R506Q	38 of 109	35.0
Homozygous factor V:R506Q	5 of 109	4.6
Heterozygous G20210A prothrombin	8 of 107	7.5
Antithrombin deficiency	2 of 109	1.8
Protein C deficiency	5 of 109	4.6
Protein S deficiency	5 of 109	4.6
Hyperhomocystinemia	11 of 101	11.0
Elevated factor VIII	12 of 102	12.0
Lupus anticoagulant	3 of 109	2.8
Of these
Two risk factors combined	13 of 101^*	13.0
Three risk factors combined	3 of 101^*	3.0

In 101 women, all risk factors were determined.