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Patients often present with dizziness that doesn't fall neatly into traditional diagnostic categories. One subset of such cases, termed “persistent postural-perceptual dizziness (PPPD),” was characterized in a recent consensus conference (J Vestib Res 2017; 27:191); criteria include the following:
Dizziness, unsteadiness, or nonspinning vertigo present on most days for 3 months or longer and fluctuating in severity
Exacerbation by upright posture, active or passive motion, or exposure to moving visual stimuli or complex visual patterns
In this U.K. study, researchers surveyed about 2000 community-dwelling adults plus several hundred healthy volunteers and students to determine the frequency of PPPD symptoms. Surveys included two standardized s…