A physical therapist evaluates a patient who presents with leg swelling and discomfort. The patient has a history of recent surgery and prolonged immobility. Based on the Wells Criteria for deep vein thrombosis, which of the following would be the MOST relevant factor in assessing the patient's risk for deep vein thrombosis?

Body mass index greater than 28
2. Previous history of deep vein thrombosis 10 years ago
3. Previous history of prostate cancer 5 years ago
4. Current diagnosis of cellulitis

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