Background: The incidence of vestibular neuritis in Norway is unknown. The disorder causes acute dizziness, which is a common reason for hospital admission. The objective of this study was to analyse the number of patients admitted to Norwegian hospitals for vestibular neuritis over an eleven-year period.
Material and method: The number of patients admitted to hospital for vestibular neuritis and reported to the Norwegian Patient Registry in the period 2011-2021 was recorded. The figures were compared with the number of patients admitted for other vertiginous disorders.
Results: The number of patients admitted to hospital for vestibular neuritis was 11.2 per 100,000 inhabitants per year (range 8.2-15.3). The number of patients admitted to hospital in the study period increased by an average of 7.9 % per year and was highest in the final year. Out of 63,884 patients admitted for vertiginous disorders in the study period, 6,450 (10.1 %) had vestibular neuritis.
Interpretation: The number of patients admitted to hospital for vestibular neuritis each year increased considerably in the study period. This is likely to be a reflection of the increased hospitalisation rate and improvements in diagnostic workup more than an actual increase in the incidence of the disorder. A minority of patients admitted for vertiginous disorders had vestibular neuritis.