PP1410 - Enhancing Driving Safety in Older Adults: Investigating the Impact of Age-Related Balance and Vestibular Declines Using vHIT

Abstract:
This project investigates the relationship between age-related balance impairments and driving behaviors in older adults, utilizing Video Head Impulse Testing (vHIT) alongside clinical evaluations. As driving risks escalate with age due to declines in vision, hearing, and vestibular function, this study focuses on the Vestibulo-Ocular Reflex (VOR) and its impact on driving safety. By assessing balance, VOR, and resilience in participants aged 50-80, we aim to identify individuals at higher risk of driving-related accidents. The findings will inform targeted interventions to enhance driving safety and improve the quality of life for elderly drivers, addressing a critical public health concern.

Summary:
Objectives
This project aims to enhance the understanding of the relationship between age-related balance impairments and driving behaviors in the elderly population. Specifically, it seeks to investigate how balance issues impact driving safety among older adults by employing Video Head Impulse Testing (vHIT) alongside other clinical evaluation protocols. We hypothesize that a significant proportion of older adults will exhibit suboptimal vHIT results, indicating balance impairments, and that these impairments will correlate with poorer driving performance as assessed in simulated driving tasks.

Rationale
Traffic accidents are a leading cause of mortality globally, with over 1.3 million fatalities each year. In the United States, traffic-related injuries among older adults are on the rise, with drivers aged 70 and above experiencing higher crash death rates compared to middle-aged drivers. Declines in vision, hearing, and cognitive function negatively affect driving abilities, particularly through deterioration of the Vestibulo-Ocular Reflex (VOR), which is crucial for stabilizing vision during head movements. Understanding how age-related changes in balance and vestibular function impact driving behavior is vital for identifying individuals at risk of driving-related problems and developing targeted interventions.

Design
This study will involve ten participants from each of the following age groups: 50-60, 60-70, and 70-80, alongside a control group of participants aged 25-45. Each participant will undergo assessments of balance, VOR function, resilience (measured using the RS-14 Resilience Scale), and simulated driving performance. The study design includes correlational analyses to explore relationships between VOR function, balance, resilience, and driving behaviors. Statistical analyses will be conducted to evaluate the data collected and to test our hypotheses.

Results
Results are expected to reveal a significant portion of the elderly population exhibiting suboptimal vHIT results, indicating age-related balance impairments. Additionally, we anticipate finding a correlation between these balance impairments and poorer driving behaviors in the simulated assessments. The data analysis will elucidate how factors such as resilience and physiological balance contribute to driving safety. This project will be completed by February 3, 2025.

Brief Summary of Clinical Takeaways:
The findings from this study will offer valuable insights into the interplay between age-related vestibular declines and driving safety, which is crucial for the aging population. By identifying individuals at risk, targeted interventions can be developed to enhance driving safety among older adults. The emphasis on both psychological resilience and physiological balance factors provides a holistic approach to mitigating risks associated with age-related declines in driving performance.