ASTRAL Score (90-Day Stroke Outcome)
ASTRAL score: 1 point per 5 years of age, 1 per NIHSS point, onset > 3 h, new visual-field defect, abnormal admission glucose, and impaired consciousness predict the 90-day unfavorable-outcome probability after ischemic stroke.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age
- 75 years
- Admission NIHSS
- 10
- Onset > 3 h (or unknown)
- Yes
- New visual-field defect
- No
- Admission glucose > 7.3 or < 3.7 mmol/L
- No
- Impaired consciousness
- No
Result: ASTRAL score 27 — higher scores predict a higher 90-day unfavorable-outcome probability.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Score
- A rising integer score maps to a higher probability of 90-day unfavorable outcome (mRS > 2). A prognostic score, not a treatment order.
What you enter
- Age
- Admission NIHSS
- Onset > 3 h (or unknown) (+2)
- New visual-field defect (+2)
- Admission glucose > 7.3 or < 3.7 mmol/L (+1)
- Impaired consciousness (+3)
How this is calculated
Ntaios G, Faouzi M, Ferrari J, Lang W, Vemmos K, Michel P. An integer-based score to predict functional outcome in acute ischemic stroke: the ASTRAL score. Neurology. 2012;78(24):1916-1922. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.