■ 学会名
ISPOR Europe 2024

■ 発表日
2024/11/17-20

■ 筆頭演者
Tianyi Zhang
Milliman Inc.

■ 共同演者
Kosuke Iwasaki, Tomomi Takeshima, Ayano Chida
Milliman Inc.

■ 発表形態
Poster

■ 要旨
Depression is a common chronic disease that lowers quality of life and leads to significant economic burdens, including medical costs, productivity losses, and suicide-related expenses. Health literacy (HL) is increasingly recognized as a factor that helps individuals make informed health decisions. This study explored the association between HL and the prevalence of depression using health insurance claims data linked with responses to the Communicative and Critical Health Literacy Scale developed by Ishikawa et al. Depression was identified by at least one ICD-10 diagnosis of “F32” or “F33” in 2022. HL was categorized into low, medium, and high levels through principal component analysis. Among 27,909 insured individuals with HL data, the overall prevalence of depression was 4.4%. After adjusting for demographics, prevalence was 5.0% in the low HL group, 4.2% in the medium group, and 3.9% in the high group. The findings indicate that individuals with higher HL levels are less likely to have reported depression. More research into the relationship between HL and the prevalence of depression could identify opportunities to reduce the rate of depression.