Prevalence of abnormal cranial CT scan in Nontraumatic headache patients with red flag symptoms at the emergency department in Hospital Universiti Sains Malaysia.

Introduction: Data on the prevalence of nontraumatic headaches with red flag symptoms in Asia are sparse. Therefore, the objectives of this study were to determine the final diagnosis and prevalence of abnormal CT scans in patients who presented to the emergency department (ED) with red flag symptoms.

Materials And Methods: This was a retrospective study based on the Radiology Department database of patients who presented to the ED with complaints of nontraumatic headache, had red flag symptoms, and underwent cranial CT scans.