Evaluation of financial relationships between Japanese certified pediatric hematologist/oncologists and pharmaceutical companies: a cross-sectional analysis of personal payments from pharmaceutical companies between 2016 and 2019.

This cross-sectional study evaluated the magnitude of personal payments made by pharmaceutical companies to pediatric hematologist-oncologists (PHOs) board-certified by the Japanese Society of Pediatric Hematology/Oncology (JSPHO), using publicly disclosed data. Among all 307 PHOs, 215 (70.0%) PHOs received $916 703 personal payments from 54 pharmaceutical companies between 2016 and 2019 in total. Median four-year payments per PHO was $1440 (interquartile range, $523-$4015). Payments per PHO significantly increased during the study period, by 23.8% (95% confidence interval: 15.3%-32.8%, P < 0.001) annually. Furthermore, leading PHOs, including university professors, society board members, and clinical practice guideline authors, received far larger personal payments from the companies.