Age

Age < 41 years+0Age 41–60 years+1Age 61–74 years+2Age ≥ 75 years+3

BMI > 25 kg/m² (Overweight or Obese)

BMI ≤ 25 kg/m²+0BMI > 25 kg/m²+1

Planned / Performed Surgery Duration

Minor surgery < 45 minutes+1Surgery > 45 minutes (open or laparoscopic)+2Elective major lower extremity arthroplasty (hip or knee replacement)+5

Active or Prior Malignancy (History of Cancer)

No malignancy+0Active or prior malignancy+2

Prior VTE (DVT or PE)

No prior VTE+0Prior DVT or PE+3

Known Thrombophilia

No known thrombophilia+0Known thrombophilia (any of the above)+3

Medical Conditions Associated with Immobility

No significant immobility+0Prolonged immobility, paraplegia, or immobilizing cast+1

Additional Risk Factors

None of the below+0Varicose veins / current leg swelling / acute MI / CHF / COPD exacerbation / IBD / pregnancy / OCPs / HRT (1 pt each — sum up to 3 for this field)+1Central venous catheter / history of stroke within 1 month / multiple trauma / spinal cord injury (add 3–5 pts)+3

Caprini Score — VTE Risk Assessment for Surgical Patients

Caprini Score — VTE Risk Assessment for Surgical Patients