|  | Mean | SD |
---|---|---|---|
BMI a (kg/m2) | Â | 22.9 | 3.2 |
 |  | n | % |
BMI (category) | Underweight: < 18.5 | 935 | 7.4 |
 | Normal: 18.5-24.9 | 8757 | 69.5 |
 | Overweight: 25-29.9 | 2625 | 20.8 |
 | Obese: ≥30 | 278 | 2.2 |
Driving status | Non-driver | 6246 | 49.6 |
 | Driver | 6349 | 50.4 |
Household composition | Living with someone | 11449 | 90.9 |
 | Living alone | 1146 | 9.1 |
Gender | Male | 5921 | 47.0 |
 | Female | 6674 | 53.0 |
Age | 65-69 | 3909 | 31.0 |
 | 70-74 | 3773 | 30.0 |
 | 75-79 | 2710 | 21.5 |
 | 80-84 | 1504 | 11.9 |
 | ≥85 | 699 | 5.5 |
Marital status | Married | 8905 | 70.7 |
 | Unmarried | 3128 | 24.8 |
 | Missing | 562 | 4.5 |
Educational attainment | < 10 years | 7228 | 57.4 |
 | 10-12 years | 3677 | 29.2 |
 | ≥13 years | 1318 | 10.5 |
 | Missing | 372 | 3.0 |
Equivalized income | < 1.5 million yen | 2529 | 20.1 |
 | 1.5-3.0 million yen | 4434 | 35.2 |
 | 3.0-4.5 million yen | 1738 | 13.8 |
 | ≥4.5 million yen | 777 | 6.2 |
 | Missing | 3117 | 24.7 |
Drinking | No or moderate drinking | 11693 | 92.8 |
 | Heavy drinking | 631 | 5.0 |
 | Missing | 271 | 2.2 |
Walking | 30 minutes or more | 8075 | 64.1 |
 | Less than 30 minutes | 3869 | 30.7 |
 | Missing | 651 | 5.2 |
SRH b | Good | 7197 | 57.1 |
 | Poor | 2875 | 22.8 |
 | Missing | 2523 | 20.0 |
IADL c | High IADL | 8882 | 70.5 |
 | Low IADL | 3185 | 25.3 |
 | Missing | 528 | 4.2 |
Diagnosed as cancer | No | 12099 | 96.1 |
 | Yes | 405 | 3.2 |
 | Missing | 91 | 0.7 |
Diagnosed as heart disease | No | 10855 | 86.2 |
 | Yes | 1649 | 13.1 |
 | Missing | 91 | 0.7 |
Diagnosed as stroke | No | 12107 | 96.1 |
 | Yes | 397 | 3.2 |
 | Missing | 91 | 0.7 |