DAPT Score

What is the DAPT score?

The DAPT score is a clinical tool designed to estimate the net benefit vs harm of extending dual antiplatelet therapy beyond 12 months after coronary stent placement.

Source note: Derived from the DAPT Study prediction rule (Yeh et al., 2016). In practice, it is used alongside bleeding-risk assessment and clinical judgment.

How is it calculated?

• Age ≥75: −2; Age 65–74: −1; Age <65: 0.
• Current smoker: +1.
• Diabetes: +1.
• MI at presentation: +1.
• Prior PCI or prior MI: +1.
• Stent diameter <3 mm: +1.
• Paclitaxel-eluting stent: +1.
• CHF or LVEF <30%: +2.
• Vein graft stent: +2.

Interpretation

• Favorable: score ≥2 (more likely net benefit from prolonged DAPT).
• Borderline: score =1 (individualize decision; consider bleeding risk and context).
• Unfavorable: score ≤0 (prolonged DAPT often has unfavorable net benefit).

How to use the result

This tool supports decision-making about DAPT duration after PCI. The result should be interpreted with the patient’s bleeding risk, comorbidities, stent/PCI complexity, and local guideline pathways.

• Use after the patient has completed ~12 months of DAPT without major bleeding or ischemic events.
• A higher score suggests more ischemic benefit relative to bleeding risk when extending DAPT.
• Always review modifiable bleeding risks (blood pressure control, interacting drugs, GI protection when appropriate).
• This score does not apply to all situations (e.g., separate indications for anticoagulation).