Table 1.

Association of Patient-Specific Risk Factors With Risk of First Episode of VTE [65,66,67].

Intrinsic Risk Factors	Odds Ratio (or) for VTE
Elevated BMI > 30	2.3
Heterozygous Prothrombin gene mutation	2.8
Heterozygous Factor V Leiden gene mutation	4.2
Homozygous Prothrombin gene mutation	6.7
Homozygous Factor V Leiden gene mutation	11.5
Antithrombin deficiency	14.0