A national prevalence study of early-onset dementia in Japan has provided data on their challenges and support needs, as documented by the individual and their family members. This study examined differences between 1) cases that the onset of early-onset dementia was detected by work colleagues, and 2) other cases.

After identifying medical or long-term care service offices used by people with early-onset dementia in 12 regions in Japan, a questionnaire was distributed to the individuals and their family members. The items surveyed were age at the time of the survey, gender, employment at the onset, age when the initial symptoms were detected, the person who detected the initial symptoms, and consideration received at the workplace. In this report, only those who were working at the onset were included in the analysis. Next, they were divided into two groups according to whether the person who detected the initial symptoms was a colleague or not, and a chi-square test was used to compare the two groups. This study was conducted with the approval of the Ethics Committee of the Tokyo Metropolitan Institute of Gerontology and Geriatric Medicine.

Of the 1035 questionnaires collected, 559 were were working at the time of onset of initial symptoms, and 149 (26.7%) of these cases were initially detected by a colleague. Comparison between groups revealed that the cases detected by colleagues 1) were recommended to see an occupational physician (P<0.001), 2) were referred to a specialist (P<0.001), 3) received consideration such as reassignment in the workplace (P<0.001), 4) received consideration regarding transportation (P=0.023), 5) had someone to talk to in the workplace (P<0.001), and 6) were significantly unlikely to receive no consideration at all (P=0.010).

Early-onset dementia was noticed by a colleague due to an increase mistake in the workplace but may have received reasonable accommodations that could have been considered by each workplace. The results of this study may help to promote dementia-friendly workplace strategies.