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Ottawa Subarachnoid Hemorrhage (SAH) Rule for Headache Evaluation

Age ≥40
No 0
Yes 1
Neck pain or stiffness
No 0
Yes 1
Witnessed loss of consciousness
No 0
Yes 1
Onset during exertion
No 0
Yes 1
Thunderclap headache (peaking pain within 1 second)
No 0
Yes 1
Limited neck flexion on examination
No 0
Yes 1
Result:

Background

Result Interpretation

Ranges Ranges