Development and validation of the Japanese version of the Death Literacy Index (DLI-J) and its short form (DLI-J-9).

ABSTRACT:

Aim

To translate, culturally adapt, and psychometrically validate the Japanese version of the Death Literacy Index (DLI-J) and its short-form version (DLI-J-9) to assess death literacy among Japanese adults.

Methods

A multiphase mixed-methods design was employed. The process included forward translation, reconciled single translation, back translation, translation review, cognitive interviews (n = 8), and psychometric validation using a nationally representative online sample of 2500 Japanese adults aged 20-79 years. Participants completed an online survey, with a subsample (n = 300) completing a retest after 4 weeks. Confirmatory factor analysis (CFA), internal consistency, construct validity, and test-retest reliability were evaluated.

Results

The DLI-

SUBMITTER: Kawaguchi K 

PROVIDER: S-EPMC12681991 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature