Table 1. The characteristics of the participants.
| Variables | Men (n = 4,479) | Women (n = 4,521) | |
|---|---|---|---|
| Age (years) | 42.27 ± 18.38 | 43.61 ± 18.79 | |
| Physical activity | None | 2,351 (52.5) | 2,704 (59.8) |
| At least weekly | 2,128 (47.5) | 1,817 (40.2) | |
| Household income | Under 1,000,000 won (USD 1,000) | 210 (4.7) | 303 (6.7) |
| 1,000,000 − 1,500,000 won | 251 (5.6) | 288 (6.4) | |
| 1,510,000 − 2,000,000 won | 361 (8.1) | 377 (8.3) | |
| 2,010,000 − 2,500,000 won | 616 (13.8) | 606 (13.4) | |
| 2,510,000 − 3,000,000 won | 689 (15.4) | 628 (13.9) | |
| 3,010,000 − 3,500,000 won | 823 (18.4) | 752 (16.6) | |
| 3,510,000 − 4,000,000 won | 586 (13.1) | 587 (13.0) | |
| 4,010,000 − 4,500,000 won | 383 (8.6) | 410 (9.1) | |
| 4,510,000 − 5,000,000 won | 269 (6.0) | 266 (5.9) | |
| 5,010,000 − 5,500,000 won | 176 (3.9) | 208 (4.6) | |
| 5,510,000 − 6,000,000 won | 51 (1.1) | 51 (1.1) | |
| Over 6,000,000 won (USD 6,000) | 64 (1.4) | 45 (1.0) | |
Results are expressed as mean ± SD or n (%). Estimate 1$ = 1,000 won