Balance Disorders: Insufficient Supply of Vestibular Examinations by the Italian National Health Service, 2021-2023

Background: Vestibular tests are critical for an early detection of balance disorders, thereby reducing the risk of falls, particularly in older adults. The present is an ecologic study where the units of observation are the Italian Regions. Regional scores of access to essential levels of care (LEAs) were employed as predictors to investigate the hypothesis that vestibular examinations supplied by the Italian National Health Service (NHS) were insufficient to meet the needs of the Italian population. Methods: The number of first-level (clinical evaluations of vestibular function) and second-level (recorded spontaneous nystagmus, induced nystagmus, or rotary stimulation) vestibular tests per 100 K population was estimated by Italian region and calendar year during the 2021-2023 period. The odds (i.e., number of any second-level vestibular tests divided by difference between number of first- and second-level tests) by region and calendar year were investigated as a proxy for regional propensity to refer patients to a second-level test following a first-level vestibular assessment. A logistic regression investigated the odds by region and calendar year. Lastly, the regional number × 100 K population (prevalence) of vestibular examinations underwent linear regression analysis, using LEAs as predictors. Results: Descriptive analysis showed that first-level assessments were the most common vestibular tests in Italy during the 2021-2023 period. Prevalence of first-level vestibular examinations was not associated with any indicator of access to healthcare in linear regression. By contrast, the prevalence of second-level vestibular tests decreased with social inequality yet increased with the indicator of higher access to hospital care. In logistic regression, referral propensity to second-level vestibular tests progressively decreased from 2021 to 2023 and exhibited considerable regional variability, being lower than in Lombardy (reference) in all other Italian regions but Veneto (aOR = 4.826; 95%CI: 4.445; 5.329) and Trento autonomous province (aOR = 1.488; 1.363; 1.624). Conclusions: The number of vestibular function tests supplied by the National Health Service in Italy during the 2021-2023 period was probably insufficient to meet the care needs of the general population, forcing more than 66.8% of patients to forgo vestibular evaluation or turn to private audiological services with out-of-pocket payments. The shortfall was greater for more costly instrumental (second-level) vestibular tests, whose supply was influenced by social inequalities and barriers to accessing audiology care at the regional level. The National Recovery and Resiliency Plan has allocated EUR 20.23 billion for healthcare services in Italy, with the aim of addressing patient care requirements in every area of the country.