Frequency and prognostic factors of olfactory dysfunction after traumatic brain injury.

Objective: To assess the frequency and factors associated with posttraumatic olfactory dysfunction, including anosmia, in a follow-up of patients with moderate and severe traumatic brain injury (TBI).

Methods: The setting was a cross-sectional study of patients that were consecutively included in the Trondheim TBI database, comprising injury-related variables. Eligible participants 18-65 years were contacted 9-104 months post trauma and asked olfactory-related questions.