Medical Care and Long-Term Care Expenditures Attributable to Alzheimer's Disease Onset: Results from the LIFE Study

Abstract

Background: Alzheimer's disease (AD) can increase both medical care and long-Term care (LTC) costs, but the latter are frequently neglected in estimates of AD's economic burden. Objective: To elucidate the economic burden of new AD cases in Japan by estimating patient-level medical care and LTC expenditures over 3 years using a longitudinal database. Methods: The study was performed using monthly claims data from residents of 6 municipalities in Japan. We identified patients with new AD diagnoses between April 2015 and March 2016 with 3 years of follow-up data. Medical care and LTC expenditures were estimated from 1 year before onset until 3 years after onset. To quantify the additional AD-Attributable expenditures, AD patients were matched with non-AD controls using propensity scores, and their differences in expenditures were calculated. Results: After propensity score matching, the AD group and non-AD group each comprised 1748 individuals for analysis (AD group: mean age±standard deviation, 81.9±7.6 years; women, 66.0%). The total additional expenditures peaked at 1398 in the first month, followed by 1192 and 1031 in the second and third months, respectively. The additional LTC expenditures increased substantially 3 months after AD onset (227), and gradually increased thereafter. These additional LTC expenditures eventually exceeded the additional medical care expenditures in the second year after AD onset. Conclusion: Although total AD-Attributable expenditures peaked just after disease onset, the impact of LTC on these expenditures rose over time. Failure to include LTC expenditures would severely underestimate the economic burden of AD.