Table 1. General characteristics of the study population.
| Variables | Eating behaviors | ||||
|---|---|---|---|---|---|
| Total | Healthy | Unhealthy | P-value1) | ||
| BSM | 55,748 (100.0) | 18,141 (32.5) | 37,607 (67.5) | < 0.001 | |
| Accurate estimation | 33,870 (60.8) | 11,408 (33.7) | 22,462 (66.3) | ||
| Underestimation | 11,566 (20.8) | 3,318 (28.7) | 8,248 (71.3) | ||
| Overestimation | 10,312 (18.4) | 3,415 (33.1) | 6,897 (66.9) | ||
| BMI | 0.021 | ||||
| Normal weight | 40,183 (72.0) | 12,966 (32.3) | 27,217 (67.7) | ||
| Underweight | 3,878 (7.0) | 1,247 (32.2) | 2,631 (67.8) | ||
| Overweight | 11,687 (21.0) | 3,928 (33.6) | 7,759 (66.4) | ||
| Age | < 0.001 | ||||
| 12 | 4,760 (8.5) | 1,856 (39.0) | 2,904 (61.0) | ||
| 13 | 9,328 (16.7) | 3,356 (36.0) | 5,972 (64.0) | ||
| 14 | 9,637 (17.3) | 3,179 (33.0) | 6,458 (67.0) | ||
| 15 | 9,433 (16.9) | 2,901 (30.8) | 6,532 (69.3) | ||
| 16 | 8,896 (16.0) | 2,767 (31.1) | 6,129 (68.9) | ||
| 17 | 9,208 (16.5) | 2,733 (29.7) | 6,475 (70.3) | ||
| 18 | 4,486 (8.1) | 1,349 (30.1) | 3,137 (69.9) | ||
| Sex | < 0.001 | ||||
| Girls | 26,689 (47.9) | 9,824 (36.8) | 16,865 (63.2) | ||
| Boys | 29,059 (52.1) | 8,317 (28.6) | 20,742 (71.4) | ||
| Grade | < 0.001 | ||||
| 7 | 9,528 (17.1) | 3,666 (38.5) | 5,862 (61.5) | ||
| 8 | 9,426 (16.9) | 3,145 (33.4) | 6,281 (66.6) | ||
| 9 | 9,721 (17.4) | 3,098 (31.9) | 6,623 (68.1) | ||
| 10 | 9,022 (16.3) | 2,768 (30.7) | 6,254 (69.3) | ||
| 11 | 8,774 (15.7) | 2,708 (30.9) | 6,066 (69.1) | ||
| 12 | 9,277 (16.6) | 2,756 (29.7) | 6,521 (70.3) | ||
| Residential area | < 0.001 | ||||
| Rural | 3,453 (6.2) | 1,238 (35.9) | 2,215 (64.2) | ||
| Urban | 23,697 (42.5) | 7,631 (32.2) | 16,066 (67.8) | ||
| Metropolitan | 28,598 (51.3) | 9,272 (32.4) | 19,326 (67.6) | ||
| Household economic status | 0.084 | ||||
| High | 21,898 (39.3) | 7,185 (32.8) | 14,713 (67.2) | ||
| Middle | 26,856 (48.2) | 8,760 (32.6) | 18,096 (67.4) | ||
| Low | 6,994 (12.5) | 2,196 (31.4) | 4,798 (68.6) | ||
| Current smoking | < 0.001 | ||||
| No | 52,273 (93.8) | 17,549 (33.6) | 34,724 (66.4) | ||
| Yes | 3,475 (6.2) | 592 (17.0) | 2,883 (83.0) | ||
| Current alcohol consumption | < 0.001 | ||||
| No | 47,762 (85.7) | 16,377 (34.3) | 31,385 (65.7) | ||
| Yes | 7,986 (14.3) | 1,764 (22.1) | 6,222 (77.9) | ||
| Stress status | < 0.001 | ||||
| None | 2,139 (3.8) | 823 (38.5) | 1,316 (61.5) | ||
| Low | 31,623 (56.7) | 10,887 (34.4) | 20,736 (65.6) | ||
| High | 21,986 (39.5) | 6,431 (29.3) | 15,555 (70.8) | ||
| Depression | < 0.001 | ||||
| No | 40,265 (72.2) | 13,850 (34.4) | 26,415 (65.6) | ||
| Yes | 15,483 (27.8) | 4,291 (27.7) | 11,192 (72.3) | ||
| Weight control attempt | < 0.001 | ||||
| No | 26,466 (47.5) | 8,234 (31.1) | 18,232 (68.9) | ||
| Yes | 29,282 (52.5) | 9,907 (33.8) | 19,375 (66.2) | ||
Values are presented as number (%).
BSM, body shape misperception; BMI, body mass index.
1)P-values for the χ2 test to evaluate and compare the general characteristics of the study participants.