Table 2.

Association of Acquired Risk Factors With The Risk of First Episode of VTE [42,76,84,85,86,87].

Acquired Risk Factors	Odds Ratio (or) for VTE
Seated immobility at work *	1.8
Long-Haul Travel †	2.1
Testosterone supplementation	2.3
Low risk COC (Levonorgestrel)	3.6
Pregnancy or Postpartum	4.2
Trauma/Fracture	4.6
Medical Hospitalization	5.1
Neurologic Disease with Leg Paresis	6.1
High risk COC (Desogestrel)	6.8
Active Cancer	14.6
Surgery	21.7

* Seated at least eight hours a day and at least three hours at a time without getting up; † Greater than four hours in a seated position in plane, car, bus, or train.