Selective CT for Anticoagulated Head Injured Patients

Inclusion Criteria: * Age ≥16 years * Presents to the emergency department after a head injury * Patient has a head CT in the emergency department * Is a current anticoagulant user Exclusion Criteria: * Head injury occurred \>48 h before patient's arrival to the emergency department * Penetrating head injury * Previously enrolled * Patient resides outside of the hospital's catchment area * Patient was transferred from another emergency department following neuroimaging * Patient was not managed by the emergency or trauma physician in the emergency department * Leaves the emergency department prior to completion of their medical assessment