Table 2 Basic characteristics of the data used in this study

Socioeconomic characteristics

 Proportion of fatherless households

1.3 (1.0—1.7)

 Proportion of divorced persons

5.0 (4.3—5.8)

 Proportion of persons with low educational level

23.2 (16.7—31.0)

 Proportion of labourers

7.4 (6.6—8.4)

 Proportion of unemployed persons

3.9 (3.2—4.6)

 Taxable income per capita (Unit:1,000 yen)

1095.6 (922.9—1289.2)

 Proportion of households living in rental housing

19.8 (12.9—27.2)

Other characteristics

 Population density

2.0 (0.6—7.4)

 Proportion of non-Japanese persons

0.7 (0.4—1.3)

 Proportion of elderly households

25.4 (21.2—31.2)

 Proportion of single households

27.5 (22.8—32.8)

 Proportion of self-employed persons

16.1 (11.3—22.9)

 Number of hospitals per capita

5.9 (0.0—10.1)

 Number of medical clinics per capita

68.4 (54.1—84.9)

HBV screening

 Number of participants

752 (280—2198)

 Number of HBsAg-positive persons

6.0 (2.0—15.0)

 HBsAg positive rate per 1,000 participants

6.2 (3.4—10.5)

 HCV screening

 Number of participants

745 (278—2182)

 Number of HCV carriers

2.0 (0.0—7.0)

 HCV prevalence per 1,000 participants

2.3 (0.0—4.5)