Masakazu Fujii

Comparison of Nationwide Volumes for Five Major Gastrointestinal Surgical Procedures in Japan: Implications From Publicly Available NCD and NDB Open Data

ABSTRACT Aim In Japan, the National Clinical Database (NCD), a clinician‐reported registry, and the National Database of Health Insurance Claims and Specific Health Checkups of Japan Open Data (NDB Open Data), an administrative claims database, are both widely used as nationwide...