Alcohol Use, Mental Health, and Functional Capacity as Predictors of Workplace Disability in a Cohort With Manifest Huntington’s Disease

Huntington’s disease (HD) is an inherited neurodegenerative disease involving motor, cognitive, psychiatric, and behavioral impairments that eventually affect work-role functioning. There is limited research regarding predictors of workplace disability in HD. The authors examined predictors of work impairment and disability in a cross-sectional cohort of employed persons with symptomatic HD participating in the worldwide Enroll-HD study.

The study sample (N=316) comprised individuals with manifest HD and a CAG repeat length range between 39 and 60 and were currently engaged in paid full- or part-time employment. Univariate and multivariate logistic regression analyses identified predictors and the effect of all predictors in a fully adjusted model.

Of the sample, 20.3% reported missing work due to HD, 60.1% reported experiencing impairment while working due to HD, 79.1% reported having work-related activity impairment due to HD, and 60.8% reported impairment in overall work productivity due to HD. Individuals had 25% higher odds of missing work time if they had a higher level of functional impairment (odds ratio=0.76, 95% CI=0.64, 0.91) and had three times greater odds of missing work if they were current alcohol drinkers, compared with nondrinkers (odds ratio=2.86, 95% CI=1.62, 5.03). Individuals with lower self-perceived mental health were also 5% more likely to experience impairment at work due to HD. Motor impairment was not a strong predictor of workplace disability.

These findings provide important new knowledge that can inform the development of strategies or targeted intervention trials to support persons with symptomatic HD to maintain their work roles.