Table 1. Basic characteristics of study population (n = 4,600).
| Characteristics | Whole popultion Number (%) | Body weight misperception: Number (%) | P for trend | ||
|---|---|---|---|---|---|
| No | Yes | ||||
| Sociodemographic factors | |||||
| Age (yr) | 20-34 | 1,426 (42.7) | 776 (28.8) | 650 (34.0) | < 0.001 |
| 35-49 | 1,964 (26.3) | 1,150 (42.8) | 814 (42.6) | ||
| 50-64 | 1,210 (31.0) | 763 (28.4) | 447 (23.4) | ||
| Residence* | |||||
| Capital city | 1,216 (26.4) | 719 (26.7) | 497 (26.0) | 0.991 | |
| Metropolitan | 980 (21.3) | 543 (20.2) | 437 (22.9) | ||
| Town or city | 2,404 (52.3) | 1,427 (53.1) | 977 (51.1) | ||
| Household income† | Lowest third | 461 (10.0) | 299 (11.1) | 162 (8.5) | 0.060 |
| Middle third | 2,541 (55.2) | 1,475 (54.9) | 1,066 (55.8) | ||
| Highest third | 1,516 (33.0) | 864 (32.1) | 652 (34.1) | ||
| No response | 82 (1.8) | 51 (1.9) | 31 (1.6) | ||
| Education | ≤ Elementary school | 632 (13.7) | 425 (15.8) | 207 (10.8) | 0.774 |
| Middle/high school | 2,475 (53.8) | 1,414 (52.6) | 1,061 (55.5) | ||
| ≥ College | 1,490 (32.4) | 848 (31.5) | 642 (33.6) | ||
| Unknown | 3 (0.1) | 2 (0.1) | 1 (0.1) | ||
| Marital status‡ | Married, with spouse | 3,443 (74.8) | 1,997 (74.3) | 1,446 (75.7) | 0.651 |
| Married, without spouse | 450 (9.8) | 286 (10.6) | 164 (8.6) | ||
| Not married | 699 (15.2) | 400 (14.9) | 299 (15.6) | ||
| Unknown | 8 (0.2) | 6 (0.2) | 2 (0.1) | ||
| Occupation§ | White collar | 957 (20.8) | 559 (20.8) | 398 (20.8) | 0.279 |
| Blue collar | 1,393 (30.3) | 862 (32.0) | 531 (27.8) | ||
| Unemployed (housewife, student, etc.) | 1,815 (39.5) | 1,016 (37.8) | 799 (41.8) | ||
| No response | 435 (9.4) | 252 (9.4) | 183 (9.6) | ||
| General health status | |||||
| Self-rated health status | Good | 1,912 (41.6) | 1,151 (42.8) | 761 (39.8) | < 0.001 |
| Middle | 1,839 (40.0) | 1,099 (40.9) | 740 (38.7) | ||
| Poor | 847 (18.4) | 437 (16.2) | 410 (21.5) | ||
| Unknown | 2 (0.0) | 2 (0.1) | |||
| Health behavior | |||||
| Frequency of drinking | Never | 1,351 (29.4) | 834 (31.0) | 517 (27.0) | 0.001 |
| 1/month | 1,777 (38.6) | 1,053 (39.2) | 724 (37.9) | ||
| 2-4/month | 994 (21.6) | 558 (20.7) | 436 (22.8) | ||
| 2-3 times/week | 390 (8.5) | 199 (7.4) | 191 (10.0) | ||
| More than 4 times/week | 88 (1.9) | 45 (1.7) | 43 (2.3) | ||
| Smoker | No | 4,067 (88.4) | 2,397 (89.1) | 1,670 (87.4) | 0.671 |
| Yes | 279 (6.1) | 146 (5.4) | 133 (7.0) | ||
| Former | 254 (5.5) | 146 (5.4) | 108 (5.6) | ||
| Exercise (MET-min∥) | ≤ 600 | 1,206 (26.2) | 725 (27.0) | 481 (25.2) | 0.425 |
| 601-2,999 | 1,626 (35.4) | 908 (33.7) | 718 (37.6) | ||
| ≥ 3,000 | 1,059 (23.0) | 629 (23.4) | 430 (22.5) | ||
| No response | 709 (15.4) | 427 (15.9) | 282 (14.7) | ||
| Mental status | |||||
| Stress recognition | Hardly | 511 (11.1) | 339 (12.6) | 172 (9.0) | < 0.001 |
| Little | 2,725 (59.2) | 1,626 (60.5) | 1,099 (57.5) | ||
| Much | 1,139 (24.8) | 621 (23.1) | 518 (27.1) | ||
| Very much | 225 (4.9) | 103 (3.8) | 122 (6.4) | ||
| Depressed mood | No | 3,859 (83.9) | 2,262 (84.1) | 1,597 (83.6) | 0.061 |
| Yes | 741 (16.1) | 427 (15.9) | 314 (16.4) | ||
*There are 7 metropolitan areas in Korea: the remaining areas were defined as either town or country; †Household income was defined as household income divided by the square root of the number of people in the household; ‡"Without spouse" includes participants who were divorced or whose spouse had died; §"White collar" includes managers, professionals, and office workers. "Blue collar" includes people in service areas, business sales, technicians, manual laborers, and people working in the agriculture, forestry, and fishing industries. MET, The Metabolic Equivalent of Task.