Driving cessation over a 24-year period: Dementia severity and cerebrospinal fluid biomarkers

INTRODUCTION

With 36 million older adult U.S. drivers, safety is a critical concern, particularly among those with dementia. It is unclear at what stage of Alzheimer's disease (AD) older adults stop driving and whether preclinical AD affects driving cessation.

METHODS

Time to driving cessation was examined based on Clinical Dementia Rating (CDR) and AD cerebrospinal fluid biomarkers. 1795 older adults followed up to 24 years received CDR ratings. A subset (591) had cerebrospinal fluid biomarker measurements and was followed up to 17 years. Differences in CDR and biomarker groups as predictors of time to driving cessation were analyzed using Kaplan-Meier curves and Cox proportional models.

RESULTS

Higher CDR scores and more abnormal biomarker measurements predicted a shorter time to driving cessation.

DISCUSSION

Higher levels of AD biomarkers, including among individuals with preclinical AD, lead to earlier driving cessation. Negative functional outcomes of preclinical AD show a nonbenign phase of the disease.

Driving cessation and AD: Issues congronting patients and family

This study surveyed older drivers with Alzheimer's disease (AD), collaterals familiar with the patient's driving, and a control group for the purpose of obtaining information about driving habits and plans for driving cessation. Drivers with dementia are at a greater risk for getting lost and having crashes than other older drivers. Family members are concerned about crashes to the extent that they are trying to prevent the AD driver from driving. Despite their concerns, many AD drivers and their families have not made plans for driving cessation. These results can assist health care professionals in developing approaches to assist AD drivers and their families as they make the transition to non-driving status.

Self-regulation of older drivers with cognitive impairment: a systematic review

BACKGROUND

Cognitive decline contributes significantly to the safety risk of older drivers. Some drivers may be able to compensate for the increased crash risk by avoiding complex driving situations or restricting their driving.

OBJECTIVE AND METHOD

A comprehensive English-language systematic review was conducted to determine the level of evidence for older adult drivers with cognitive impairment engaging in self-regulation.

RESULTS

Twelve studies were included in the review. The majority of studies investigated driver avoidance, followed by driver restriction. Few studies ascertained the reasons for changing driving behaviour.

CONCLUSIONS

The evidence supports the view that drivers with cognitive impairment do restrict their driving and avoid complex driving situations. However, it remains to be determined whether the drivers who engage in self-regulation have insight into their own driving abilities or whether external factors result in self-regulation of driving behaviour.

Association of the spatial layout of the home and ADL abilities among older adults with dementia

We investigated the relationship between architectural space syntax measures describing the spatial layout of a home and activities of daily living (ADL) among people with dementia. We visited the homes of 82 participants in a dementia care comparative effectiveness clinical trial and measured the space syntax variables intelligibility and convexity along with several clinical variables, including ADLs. In regression models, we estimated the cross-sectional association between space syntax measures and ADLs. Higher convexity was associated with worse performance of basic but not instrumental ADLs (adjusted β =19.2, P = .02). Intelligibility was not associated with ADLs. These results imply that enclosed rooms with a clearly legible meaning and function might be better memorized and associated with the spatial layout of the home resulting in better basic ADL performance. These results warrant further research on space syntax measures in the home environment of people with dementia, including longitudinal study, which we are pursuing.

Differences in perceptions regarding driving between young and old drivers and non-drivers in Japan

OBJECTIVE

The issue of driving cessation for dementia patients is one of the urgent public health priorities in Japan and is often complicated, with family or social barriers yet to be sufficiently addressed. Because the possibility of dementia or family caregiving can befall anyone, we focused on the disparity in people's perceptions of driving as possible barriers. The present study aimed to assess perceptions of driving among the general public and examine differences in perceptions based on age and driving status.

METHODS

A survey was conducted in a sample of the general public aged 40 and over in Japan. Respondents were 1010 people who received a self-administered questionnaire that included questions regarding perceptions about driving and sociodemographic factors.

RESULTS

The drivers that participated in this study tended to highly agree that 'driving is a "right" which we all deserve', compared with the non-drivers. The most common reason for reluctance to stop driving among drivers was the possible loss of personal mobility. Apart from transportation, older drivers were more likely than younger drivers to value the qualitative aspects of driving, for example, driving was viewed as 'a motivating factor in my life'.

CONCLUSIONS

These disparities in the general public's perceptions about driving may be possible family or social barriers to driving cessation in the case of drivers with dementia. Our findings also suggest that when addressing the need for driving retirement, not only mobility but also the qualitative aspects of driving be paid more attention.

Environmental interventions and the design of homes for older adults with dementia: an overview

In Western societies, the vast majority of people with dementia live at home and wish to remain doing so for as long as possible. Aging in place can be facilitated through a variety of environmental interventions, including home modifications. This article provides an overview of existing design principles and design goals, and environmental interventions implemented at home, based on literature study and additional focus group sessions. There is a multitude of design principles, design goals, and environmental interventions available to assist with activities of daily living and functions, although few systematic studies have been conducted on the efficacy of these goals and interventions. The own home seems to be a largely ignored territory in research and government policies, which implies that many problems concerning aging in place and environmental interventions for dementia are not adequately dealt with.

Driving and dementia of the Alzheimer type: beliefs and cessation strategies among stakeholders

PURPOSE

Although driving by persons with Alzheimer's disease (AD) is an important public health concern, we know little about the attitudes and perceptions of key stakeholders regarding driving safety in these individuals or the factors that precipitate and influence driving assessment and cessation decisions.

DESIGN AND METHODS

We convened 10 focus groups composed of persons intimately involved in driving decisions for older adults to identify and compare beliefs and perceptions concerning AD and driving and to identify effective strategies to limit or cease unsafe driving. The 68 focus-group participants included health professionals, transportation and law-enforcement professionals, current and former drivers with AD, and family caregivers of current and former drivers with the disease.

RESULTS

With few exceptions, participants said that a diagnosis of very mild AD alone did not preclude driving. Most regarded family members as pivotal in monitoring and managing unsafe driving and recognized their need for institutional and medical support, especially support from physicians in counseling and evaluation of health-related fitness of older drivers. Members of each group acknowledged their own roles and responsibilities in driving decisions and described difficulties they experienced in making assessments and implementing decisions to limit or stop the driving of given individuals with AD.

IMPLICATIONS

Education of families, professionals, and transportation specialists is needed to understand the influence of AD severity on driving abilities, identify problem driving behaviors, make appropriate referrals of unsafe drivers, and access available resources for drivers with AD and those most responsible for their safety.

Identifying driving impairment in Alzheimer disease: a comparison of self and observer reports versus driving evaluation

This study examined the relationship between driving behaviors and awareness of deficit in patients with Alzheimer's disease (AD). Fifteen mildly impaired AD patients and 15 healthy elderly controls with valid drivers' licenses were administered a series of questionnaires concerning daily functioning and driving performance, and all 30 subjects were evaluated on a standardized road test. Self-report and caregiver/informant responses were compared with determine levels of discrepancy in ratings, while comparisons of AD and healthy elderly controls revealed group differences. Actual driving performance was considered the standard by which to determine accuracy of perceptions. Drivers with AD were rated as significantly worse than healthy elderly drivers on nine of 10 driving behaviors by an independent evaluator. AD patients' self-reports of driving ability were significantly better than the evaluator's ratings on seven of the 10 items, whereas the healthy elderly drivers rated themselves better than did the evaluator on one item. Although caregivers were likely to acknowledge a general concern with their AD patients' driving, they underreported specific driving problems when their ratings were compared with those of an independent evaluator. These findings have implications for the development of caregiver-based modifications of driving behavior.