Table 1 Characteristics of the respondents
| Â | n | % | Â | n | % |
|---|---|---|---|---|---|
Overall | 9414 | 100.0 | Equivalized income | Â | Â |
Sports activity |  |  |    <1 million yen | 937 | 10.0 |
   No sports activities | 5227 | 55.5 |    1-2 million yen | 2123 | 22.6 |
   Several times a year | 70 | .7 |    2-3 million yen | 2161 | 23.0 |
   Once or twice a month | 230 | 2.4 |    3-4 million yen | 1451 | 15.4 |
   Once a week | 676 | 7.2 |    ≥4 million yen | 929 | 9.9 |
   Twice or three times a week | 1176 | 12.5 |    Missing | 1813 | 19.3 |
   Almost everyday | 1495 | 15.9 | Having paid work |  |  |
   Missing | 540 | 5.7 |    Yes | 2272 | 24.1 |
Walking time/day |  |  |    No | 6970 | 74.0 |
   Less than 30 minutes | 2936 | 31.2 |    Missing | 172 | 1.8 |
   30 to 60 minutes | 3074 | 32.7 | SRH |  |  |
   60 to 90 minutes | 1183 | 12.6 |    Good | 6591 | 70.0 |
   More than 90 minutes | 1104 | 11.7 |    Poor | 2585 | 27.5 |
   Missing | 1117 | 11.9 |    Missing | 238 | 2.5 |
Age | Â | Â | GDS | Â | Â |
   65-69 | 3386 | 36.0 |    Low depressive symptoms | 7401 | 78.6 |
   70-74 | 2765 | 29.4 |    High depressive symptoms | 565 | 6.0 |
   75-79 | 1886 | 20.0 |    Missing | 1448 | 15.4 |
   80-84 | 938 | 10.0 | IADL |  |  |
   ≥85 | 439 | 4.7 |    High IADL | 7178 | 76.2 |
Gender |  |  |    Low IADL | 1837 | 19.5 |
   Male | 4519 | 48.0 |    Missing | 399 | 4.2 |
   Female | 4895 | 52.0 | Location |  |  |
Marital status |  |  |    North | 3856 | 41.0 |
   Married | 6759 | 71.8 |    South | 5558 | 59.0 |
   Divorced/widowed | 2321 | 24.7 | Years of residence |  |  |
   Never married | 127 | 1.3 |    <50 years | 4819 | 51.2 |
   Missing | 207 | 2.2 |    ≥50 years | 4138 | 44.0 |
Educational attainment |  |  |    Missing | 457 | 4.9 |
   <6 | 430 | 4.6 |  |  |  |
   6-9 | 5242 | 55.7 |  |  |  |
   10-12 | 2711 | 28.8 |  |  |  |
   ≥13 | 903 | 9.6 |  |  |  |
   Missing | 128 | 1.4 |  |  |  |