National trends in incidence, mortality, hospitalizations, and expenditures for pemphigus in Taiwan

Background: Data on trends in epidemiological characteristics and economic burden of pemphigus are scarce. Objective: To describe national trends in pemphigus' incidence, mortality, hospitalizations, and expenditures between 2003 and 2015 in Taiwan. Methods: This nationwide study used the Taiwan National Health Insurance Research Database to identify pemphigus patients from 2003 to 2015. Annual incidence, prevalence, healthcare utilization, and expenditure trends were calculated and analyzed. Results: Pemphigus' incidence increased significantly from 3.19 to 4.70 per million person-years in 2003-2010 but fluctuated in 2011-2015. Pemphigus patients had higher mortality and care costs. Medical utilization and expenditure declined for pemphigus inpatients and outpatients. Systemic corticosteroid use decreased, but mortality remained stable. Conclusion: The health expense reduction for pemphigus was mainly attributed to decreased utilization, length of stay, and inpatient costs. The persistently elevated mortality rate highlights an unmet need in pemphigus therapy. (C) 2020 Japanese Society for Investigative Dermatology. Published by Elsevier B.V. All rights reserved.