Severe hearing loss is a sensory deficit with considerable impact on the patient’s daily life and on society. Previous research has established occupational obstacles in professionally active patients with hearing loss. However, studies investigating the impact of severe hearing loss and cochlear implantation (CI) on work performance using a quantitative and longitudinal study design and validated questionnaires are lacking. This study aims to answer the following research question: ‘What is the impact of unilateral and bilateral severe hearing loss and CI on the cost for society, health state, employment, productivity and social well-being?’. We hypothesise hearing impairment to influence work performance. After establishing the impact, we will be able to enhance the support of hearing impaired patients to maintain employed.
A total of 200 professionally active adults between 18 and 65 years old with severe hearing loss will be included for assessment at baseline and reassessment at 3, 6 and 12 months. The following four study groups are included: bilateral severely hearing impaired participants without CI (1) and with CI (2) and unilateral severely hearing impaired participants in acute (3) and chronic (4) setting. The primary outcome of this study is the change in index score on the Work Limitations Questionnaire, which evaluates the degree of limitations and health-related productivity loss. Secondary outcome measures include audiometric and cognitive evaluations and validated questionnaires evaluating employment, work productivity, quality of life and direct healthcare costs. Linear mixed models will assess the evolution in time and the difference in evolution between groups.