DRAGON Score (post-tPA outcome)
DRAGON score (Strbian 2012): predicts functional outcome after IV thrombolysis for anterior-circulation stroke (0-10).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Hyperdense MCA sign / early infarct on CT
- Both present (+2)
- Pre-stroke mRS > 1
- Yes
- Age
- 82
- Baseline glucose > 8 mmol/L
- Yes
- Onset-to-treatment time
- 120
- Baseline NIHSS
- 18
Result: DRAGON 10/10: miserable prognosis (mRS 0-2 ~0%; miserable outcome, mRS 5-6, ~89-97% at scores 8-10).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Outcome
- good outcome (mRS 0-2) ~96% at 0-1 and 0% at 8-10; miserable outcome (mRS 5-6) ~89% at 8 and ~97% at 9-10; the middle range is intermediate.
What you enter
- Hyperdense MCA sign / early infarct on CT
- Pre-stroke mRS > 1
- Age (years)
- Baseline glucose > 8 mmol/L (>144 mg/dL)
- Onset-to-treatment time (min)
- Baseline NIHSS
How this is calculated
- Components
- Dense artery / early infarct on CT (0/+1/+2), prestroke mRS > 1 (+1), Age (0/+1/+2), Glucose > 8 mmol/L (+1), Onset-to-treatment > 90 min (+1), and NIHSS (0/+1/+2/+3), summed 0-10.
Strbian D, Meretoja A, Ahlhelm FJ, et al. Predicting outcome of IV thrombolysis-treated ischemic stroke patients: the DRAGON score. Neurology. 2012;78(6):427-432. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.