💊 DAPT Score (Dual Antiplatelet Duration)
Weigh prolonged dual antiplatelet therapy after PCI with the DAPT score.
Clinical takeaway
Applies to patients event-free and DAPT-tolerant at 12 months.
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When to use
Decide whether to extend DAPT beyond 12 months.
How it works
Age ≥75 (−2)/65–74 (−1); smoking, diabetes, MI at presentation, prior PCI/MI, stent < 3 mm, paclitaxel stent each +1; CHF/LVEF < 30% and vein-graft PCI +2. ≥ 2 favours prolonged DAPT.
Key points
- Applies to patients event-free and DAPT-tolerant at 12 months.
- ≥ 2 → ischaemic benefit likely exceeds bleeding harm.
- Combine with a formal bleeding risk assessment.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Age | < 65 (0) |
|---|---|
| Current cigarette smoker | No |
| Diabetes mellitus | No |
| MI at presentation | No |
| Prior PCI or prior MI | No |
| Stent diameter < 3 mm | No |
| Paclitaxel-eluting stent | No |
| CHF or LVEF < 30% | No |
| Saphenous vein graft PCI | No |
→DAPT score0
- Interpretation：< 2 — favour shorter DAPT (bleeding risk may outweigh benefit)
- Caveat：Calculated only for patients event-free at 12 months who tolerated DAPT; combine with formal bleeding risk assessment.
| Age | ≥ 75 (−2) |
|---|---|
| Current cigarette smoker | Yes (+1) |
| Diabetes mellitus | Yes (+1) |
| MI at presentation | Yes (+1) |
| Prior PCI or prior MI | Yes (+1) |
| Stent diameter < 3 mm | Yes (+1) |
| Paclitaxel-eluting stent | Yes (+1) |
| CHF or LVEF < 30% | Yes (+2) |
| Saphenous vein graft PCI | Yes (+2) |
→DAPT score8
- Interpretation：≥ 2 — benefit of prolonged DAPT likely outweighs bleeding risk
- Caveat：Calculated only for patients event-free at 12 months who tolerated DAPT; combine with formal bleeding risk assessment.
Frequently asked questions
- What is DAPT Score (Dual Antiplatelet Duration)?
- Weigh prolonged dual antiplatelet therapy after PCI with the DAPT score.
- How is DAPT Score (Dual Antiplatelet Duration) calculated? What is the core formula?
- Age ≥75 (−2)/65–74 (−1); smoking, diabetes, MI at presentation, prior PCI/MI, stent < 3 mm, paclitaxel stent each +1; CHF/LVEF < 30% and vein-graft PCI +2. ≥ 2 favours prolonged DAPT.
- When is DAPT Score (Dual Antiplatelet Duration) used?
- Decide whether to extend DAPT beyond 12 months.
- What are the key clinical points for DAPT Score (Dual Antiplatelet Duration)?
- Applies to patients event-free and DAPT-tolerant at 12 months. ≥ 2 → ischaemic benefit likely exceeds bleeding harm. Combine with a formal bleeding risk assessment.
- What are the limits and cautions when using DAPT Score (Dual Antiplatelet Duration)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is DAPT Score (Dual Antiplatelet Duration) calculated in practice? Can you show a worked example?
- Inputs: Age < 65 (0), Current cigarette smoker No, Diabetes mellitus No, MI at presentation No, Prior PCI or prior MI No, Stent diameter < 3 mm No, Paclitaxel-eluting stent No, CHF or LVEF < 30% No… → Result: DAPT score 0（Interpretation: < 2 — favour shorter DAPT (bleeding risk may outweigh benefit), Caveat: Calculated only for patients event-free at 12 months who tolerated DAPT; combine with formal bleeding risk assessment.） Inputs: Age ≥ 75 (−2), Current cigarette smoker Yes (+1), Diabetes mellitus Yes (+1), MI at presentation Yes (+1), Prior PCI or prior MI Yes (+1), Stent diameter < 3 mm Yes (+1), Paclitaxel-eluting stent Yes (+1), CHF or LVEF < 30% Yes (+2)… → Result: DAPT score 8（Interpretation: ≥ 2 — benefit of prolonged DAPT likely outweighs bleeding risk, Caveat: Calculated only for patients event-free at 12 months who tolerated DAPT; combine with formal bleeding risk assessment.）