Geographical Distribution of Radiotherapy Resources in Japan: Investigating the Inequitable Distribution of Human Resources by Using the Gini Coefficient

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  • TANIKAWA Takumi
    Department of Medical Informatics and Hospital Management, Asahikawa Medical University Research Center for Charged Particle Therapy, National Institute of Radiological Sciences
  • OHBA Hisateru
    Department of Medical Management and Informatics, Hokkaido Information University
  • OGASAWARA Katsuhiko
    Graduate School of Health Sciences, Hokkaido University
  • OKUDA Yasuo
    Research Center for Charged Particle Therapy, National Institute of Radiological Sciences
  • ANDO Yutaka
    Research Center for Charged Particle Therapy, National Institute of Radiological Sciences

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This is a pilot study that aims to elucidate regional disparities in the distribution of medical resources in Japan. For this purpose, we employed the Gini coefficient (GC) in order to analyze the distribution of radiotherapy resources, which are allocated to each prefecture in Japan depending on the size of its population or physical area. Our study used data obtained from the 2005 and 2007 national surveys on the structure of radiation oncology in Japan, conducted by the Japanese Society for Therapeutic Radiology and Oncology (JASTRO). Our analysis showed that the regional disparities regarding the radiation oncologists and radiotherapy technologists were small, and concluded that such resources were almost equitably distributed. However, medical physicists are inequitably distributed. Thus, policymakers should create and implement measures to train and retain medical physicists in areas with limited radiotherapy resources. Further, almost 26% of the secondary medical service areas lacked radiotherapy institutions. We attribute this observation to the existence of tertiary medical service areas, and almost all of prefectures face a shortage of such resources. Therefore, patients' accessibility to these resources in such areas should be improved.

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