Epidemiological research about relation with the fundamental characteristic of life expectancy, medical care factors, and social economy factors in second medical care areas in Japan

合并各市的原始数据，并将其转换为二级医疗保健地区的日期。报告了预期寿命、医疗保健因素、社会经济因素的关系及地区差异。本研究主要目的在探讨全民健康保险医疗费用的地区差异因素。为了比较日本各地区之间的医疗费用，使用了”地区差异指数”。地区差异指数是对年龄构成差异进行校正的指标。主要研究结果如下：（1）日本西部和北海道的住院医疗费用有较高的趋势。口腔医疗费用在大城市有较高的趋势。不同医疗费用的分布有差异。2)地区差异指数与医疗机构的数量有关。认为医疗费用与卫生资源的可及性有关。3)住院医疗费用的地区差异指数与老年人比例有关。有人认为，不必要的住院治疗是相关的。

The original data of municipalities were combined and converted into the date of the date of secondary medical care areas. The relation and regional difference of the life expectancy, the medical care factor, and the social economy factor were reported. The purpose of main research was to examine the regional difference factor of medical expenditure by National Health Insurance. To compare medical expenditure among regions in Japan, the" regional difference index" has been used. A regional difference index is the index which rectified the difference of age composition. The main findings are summarized as follows; 1) Medical expenditure for hospitalization had a high tendency in western part of Japan and Hokkaido. Medical expenditure for dental care had a high tendency in the big city part. Distribution had a difference according to the kind of medical expenditure. 2) The regional difference index have related to the number of medical facilities. It was suggested that medical expenditure have relation to access to health resource. 3) About medical expenditure for hospitalization, regional difference index have related to an elderly ratio. It was suggested that unnecessary hospitalization is related.