Question:easy
All of the following are risk factors for deep vein thrombosis (DVT) except -
All of the following are risk factors for deep vein thrombosis (DVT) except -
Show Hint
Advanced age, not youth, is the venous-clot risk factor.
Updated On: Jun 24, 2026
- Duration of surgery more than thirty minutes
- Obesity
- Age less than forty years
- Use of the oestrogen-progesterone contraceptive pills
Show Solution
The Correct Option is C
Solution and Explanation
Step 1: Read this as an odd-one-out item. Three choices should genuinely raise the chance of a clot in a deep vein, and one will not.
Step 2: Group the true risk factors. A long operation lasting over half an hour keeps the patient still and lets blood pool in leg veins. Excess body weight worsens this pooling and shifts the blood toward clotting. Pills containing oestrogen and progesterone are classic drug-related causes of clots because they increase circulating procoagulant factors.
Step 3: Now test the age option. The danger from age comes from being OLD, not young. Patients beyond 40 and especially the elderly clot more easily. A person under 40 years is at lower baseline risk, so describing youth as a risk factor is wrong.
Step 4: The single non-risk choice is age below forty years.
\[\boxed{\text{Age less than forty years}}\]
Step 2: Group the true risk factors. A long operation lasting over half an hour keeps the patient still and lets blood pool in leg veins. Excess body weight worsens this pooling and shifts the blood toward clotting. Pills containing oestrogen and progesterone are classic drug-related causes of clots because they increase circulating procoagulant factors.
Step 3: Now test the age option. The danger from age comes from being OLD, not young. Patients beyond 40 and especially the elderly clot more easily. A person under 40 years is at lower baseline risk, so describing youth as a risk factor is wrong.
Step 4: The single non-risk choice is age below forty years.
\[\boxed{\text{Age less than forty years}}\]
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