A Comparison of UK and USA Idiopathic Intracranial Hypertension (IIH) Patient Populations

The management of IIH varies among centers and countries. Demographic factors potentially influencing the presentation/severity of IIH in USA vs UK are obesity, affecting 25.4% of British women and 33.9% of American women1, and ethnicity2, with 2.81% of the British population identifying as black on the latest census data, compared to 32% in USA and 61% local to our USA referral center. We compared the presenting features of IIH between populations in UK and USA tertiary referral centers, assessing whether population differences cause different presentations.