Seasonal and cultural effects on calendar day variations in trauma incidence in Japan.

ABSTRACT: Trauma incidence patterns are influenced by societal and cultural factors. However, research has mainly focused on short-term periods. This study examined daily trauma trends throughout the year to identify fluctuations aligned with lifestyle patterns under a relatively homogeneous ethnocultural context, using long-term nationwide trauma data. Data from patients with trauma recorded in the Japan Trauma Data Bank (2004-2021; n = 383,473) were retrospectively analyzed. Participants were grouped by transport date into 365 daily cohorts. Daily patient volumes, injury severity, suicide attempts, and mortality were assessed. Outliers were identified using negative binomial regression with periodic functions, logistic regression adjusted for trauma severity, and the Generalized Extreme Studentize

SUBMITTER: Suzuki K 

PROVIDER: S-EPMC12715191 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature