Table 1.

Characteristics of socio-demographic indicators among municipalities in Japan (N = 3361).

Indicator	Mean ± S.D.	(range)
Population (thousands)	37.8 ± 77.3	(0.2 – 1024.1)
Population density (per square kilometer)	928.9 ± 2257.6	(1.5 – 19854.1)
Proportion of elderly (%) a	23.7 ± 7.3	(7.6 – 50.6)
Percentage of households of a single elderly (%)a	8.0 ± 4.2	(0.7 – 31.6)
Percentage of nuclear households (%)	54.4 ± 8.7	(20.2 – 78.8)
Divorce rate (per 1000)	1.7 ± 0.4	(0.9 – 4.0)
Per capita income (thousand yen)	1225 ± 299	(419 – 3926)
Unemployment rate (%)	3.88 ± 1.64	(0.0 – 18.1)

^a65 years or over