Which is NOT a risk factor for DVT?

The correct answer indicates that smoking is not considered a significant risk factor for deep vein thrombosis (DVT), compared to the other options listed.

When examining the risk factors for DVT, cancer is known to increase the likelihood of thrombosis due to various factors such as tumor presence and treatments like chemotherapy that can affect blood coagulation. Surgery is also a well-documented risk factor because it can lead to reduced mobility and tissue damage, both of which can contribute to clot formation. Age is another important risk factor, as the likelihood of DVT increases with advancing age due to changes in blood flow, vessel integrity, and other health conditions that may develop over time.

While smoking can contribute to cardiovascular issues and other health concerns, its direct correlation with DVT risk is not as strong or as widely recognized as the other factors listed. Therefore, identifying smoking as the factor that is not integral to the risk profile for DVT aligns with current understanding and guidelines in vascular health.