Mental Fatigue in Patients with Hearing Loss and/or Tinnitus Undergoing Audiological Rehabilitation—A Pilot Study

Background: Both tinnitus and hearing loss are multidimensional. The purpose of this study was to identify and determine the degree of mental fatigue in patients with hearing loss and/or tinnitus participating in audiological rehabilitation, and to examine the self-reported mental fatigue scale (MFS) in this patient group. Methods: Patients undergoing audiological rehabilitation at the Department of Audiology and Neurotology, Karolinska University Hospital, Sweden, between 2011 and 2017 who completed a self-reported MFS questionnaire were investigated. Data on 76 patients were analysed in this pilot study. Patients were also assessed using the Tinnitus Handicap Inventory (THI). Results: The study population had an age range of 38–65 years, and most had normal hearing (37%) or mild to moderate hearing loss (46%). Only 17% had severe to profound hearing loss. A total of 56.5% had tinnitus, of whom 39.5% scored ≥57 on the THI, indicating severe tinnitus, whereas 43.5% reported no tinnitus. The MFS scores, ranging from 13 to 42.5 points, were divided into three severity levels for analysis: 10.5–15, 15.5–20, and ≥20.5. In total, 67% of the patients had MFS scores ≥ 20.5. Importantly, most of the participants (90%) with a THI score ≥ 57 belonged to that group. A significant positive correlation between a high MFS score and severe tinnitus was found. Conclusions: The study reveals that severe mental fatigue is more common in patients with severe tinnitus than sole hearing loss.