Characteristics of the participants and stratification by gender
| Characteristic | Overall | Male | Female |
|---|---|---|---|
| Number | 901 | 409 (45.4%) | 492 (54.6%) |
| Age, mean±SD | 74.04±6.92 | 76.35±7.33 | 72.12±5.92 |
| BMI (kg/m2) | 24.29±3.25 | 24.38±2.92 | 24.22±3.50 |
| Occupation | |||
| White collar | 503 (55.8%) | 273 (66.7%) | 230 (46.7%) |
| Blue collar | 203 (22.5%) | 128 (31.3%) | 75 (15.2%) |
| Not working | 195 (21.6%) | 8 (2%) | 187 (38%) |
| Years of formal education | |||
| ≦12 years | 574 (63.7%) | 201 (49.1%) | 373 (75.8%) |
| >12 years | 327 (36.3%) | 208 (50.9%) | 119 (24.2%) |
| Weekly exercise level | |||
| None | 137 (15.2%) | 49 (12.0%) | 88 (17.9%) |
| 1–3 times | 226 (25.1%) | 92 (22.5%) | 134 (27.2%) |
| Everyday | 538 (59.7%) | 268 (65.5) | 270 (54.9%) |
BMI, body mass index.