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Table 1 Municipal characteristics used in this study

From: Analysis of the regional distribution of road traffic mortality and associated factors in Japan

Characteristics Description Source
Demographic characteristics
 Population density Number of persons per hectare The Survey on Areas by Municipalities and the Basic Resident Register
 Daytime population Number of persons in daytime in a municipality The Census
 Proportion of young population Proportion of young population aged below 15 years The Basic Resident Register
 Proportion of non-Japanese persons Proportion of non-Japanese persons among the total population (%) The Basic Resident Register
 Proportion of divorced persons Proportion of divorced persons among persons aged 15 years old or more (%) The Census
Socioeconomic characteristics
 Proportion of persons with lower educational level Proportion of elementary school or junior high school graduates among population aged 15 years or more (%) The Census
 Proportion of clerical workers Proportion of clerical workers in the labor force (%) The Census
 Proportion of agriculture, forestry, and fisheries workers Proportion of agriculture, forestry, and fisheries workers in the labor force (%) The Census
 Proportion of service workers Proportion of service workers in the labor force (%) The Census
 Proportion of blue-collar workers Proportion of blue-collar workers in the labor force (%) The Census
 Proportion of unemployed persons Proportion of unemployed persons in the labor force (%) The Census
 Taxable income per capita The Survey on Taxation Status of Municipal Tax and the Basic Resident Register
Medical characteristics
 Number of clinics per 100,000 persons Number of clinics per 100,000 persons The Survey of Medical Institutions and the Basic Resident Register
 Number of physicians per 100,000 persons Number of physicians per 100,000 persons The Statistics of Physicians, Dentists and Pharmacists and the Basic Resident Register
 Number of hospitals per 100,000 persons Number of hospitals per 100,000 persons The Survey of Medical Institutions and the Basic Resident Register
Weather characteristics
 Proportion of rainy days Proportion of rainy days in a year (%) Japan Meteorological Agency
 Proportion of snow days Proportion of snow days in a year (%) Japan Meteorological Agency
Characteristics related to vehicles
 Proportion of holders of a driver’s license Proportion of holders of a driver’s license among persons aged > 15 years (%) The Statistics of Driver’s License and the Census
 Number of owned vehicles per household Number of owned vehicles per household among two-person households The National Survey of Family Income and Expenditure
 Number of owned motorcycles per 1000 persons Number of owned motorcycles per household among 1000 persons The Automobile Inspection & Registration Information Association and the Basic Resident Register