Objective: The relationship of cognitive dysfunction and vestibular dysfunction has been established by various studies. However, the available Patient-Reported Outcome Measures questionnaires that address the main vestibular complaint fail to highlight this domain of dysfunction in this patient population. The objective of this study was to quantify and compare cognitive impairment using a validated cognitive questionnaire across several vestibular diagnoses.
Study design: Cross-sectional study of 186 patients presenting to a tertiary care vestibular clinic with a diagnosis of vestibular migraine, Meniere's disease (MD), benign positional paroxysmal vertigo, or persistent postural-perceptual dizziness (PPPD). Patients completed the Cognitive Failures Questionnaire (CFQ) and the Dizziness Handicap Inventory (DHI).
Results: Mean CFQ scores for this cohort were significantly higher than similarly aged published controls (34.9/100 versus 31.3/100; p < 0.01; mean age, 45 years) as well as published controls between 65 and 74 years of age (34.9/100 versus 31.2/100; p < 0.05). Patients with PPPD or combined vestibular migraine and MD scored the highest on the CFQ and significantly higher than controls (45.1/100, p = 0.001; and 44.1/100, p = 0.006, respectively). Patients with benign positional paroxysmal vertigo had lower scores than normal controls. There is a weak but significant correlation between CFQ and DHI (r = 0.31; p < 0.001). Multivariate linear regression shows that CFQ scores were largely driven by the duration of symptoms (p < 0.001), type of diagnosis (notably PPPD; p = 0.026), and DHI (p < 0.001).
Conclusions: Our results indicate that cognitive impairment is prevalent with chronic vestibular disorders, even in peripheral disorders such as MD. The duration of vestibular symptoms before diagnosis (and management), as well as certain etiologies, may play a bigger role in cognitive disability than age. This is not currently well-addressed in Patient-Reported Outcome Measures questionnaires and may be overlooked at the time of the diagnosis. Appropriate identification may help tailor treatment, namely rehabilitation programs, to individual patients.