BACKGROUND AND OBJECTIVES: Early-onset dementia (EOD), affecting individuals younger than 65 years, imposes a substantial socioeconomic burden. However, evidence on long-term income trajectories and productivity loss across EOD subtypes remains limited. The aim of this study was to evaluate income trajectories and societal productivity loss in individuals with different EOD subtypes. METHODS: This retrospective, population-based longitudinal cohort study included all patients with EOD from Kuopio University Hospital and Oulu University Hospital referral area between January 2010 and December 2021. Diagnoses were re-validated through clinical data review. For each study case, 10 randomly selected matched controls were used. Demographics, education, and comorbidities were obtained from national registers. Annual gross income was retrieved from Statistics Finland tax records. The Human Capital Approach was used to calculate productivity losses, in effect by estimating the annual income difference relative to controls using a generalized estimating equation regression model, with panel data spanning 15 years before diagnosis and the year of diagnosis. RESULTS: < 0.001). DISCUSSION: This large-scale longitudinal study demonstrates significant productivity loss up to 15 years before EOD diagnosis, with variation across dementia subtypes. Earlier recognition and targeted interventions are needed in the future to mitigate the substantial socioeconomic burden of EOD. TRIAL REGISTRATION INFORMATION: This study is part of DEGE-RWD-research project (protocol registered to ClinicalTrials.gov: NCT06209515), coordinated by Neurocenter Finland.
Kivisild et al. (Wed,) studied this question.