Multi-Center Registry Cohort Study on Prognostic Factors and Prediction Model Construction in Aneurysmal SAH

Inclusion Criteria: * Subarachnoid hemorrhage confirmed by computed tomography (CT); * Cerebral angiography (CTA) and digital subtraction angiography (DSA) examination confirming intracranial aneurysm rupture as the cause of the subarachnoid hemorrhage; * Blood routine, biochemical function, blood coagulation function, and craniocerebral CT performed within 24 hours of symptom onset; * Underwent aneurysm clipping by surgery or endovascular embolization within 72 hours after-onset. Exclusion Criteria: * Aneurysm rupture bleeding time exceeding 24 hours before hospital admission; * Incomplete image data or blood test information; * Long-term use of anticoagulant medications such as aspirin or warfarin; * Admitted to hospital with active infectious diseases; * long-term anticoagulant drugs such as aspirin, wave dimensions; * Presence of other intracranial vascular malformations.