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Negative / Null Result ReportOpen accessMedicine

Regional disparities in insurance-covered cognitive behavioural therapy in Japan: a nationwide cross-sectional study using National Database Open Data, 2015-2023.

Fujii T; Nogami Y; Seo T · 2026 · BMJ open

WASTE classifies this as Negative / Null Result Report · AI classification, approximate

The study found no significant effect — useful as a negative control or null benchmark for your own design.

Abstract (excerpt)

Objectives Cognitive behavioural therapy (CBT) is recommended as a first-line treatment for depression and anxiety disorders, but its utilisation under Japan's national health insurance remains poorly understood. This study aimed to…

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Metadata source: Europe PMC · DOI 10.1136/bmjopen-2025-115722