General distribution of socioeconomic status, chronic disease, obesity level by BMI, weight perception and HRQoL by sex
| Men (n=18 602) | Women (n=25 281) | |||
| N* | % (SE)† | N | % (SE) | |
| Survey cycle | ||||
| KNHANES IV (2007–2009) | 6981 | 33.0 (0.5) | 9408 | 32.5 (0.5) |
| KNHANES V (2010–2012) | 7370 | 40.7 (0.6) | 10 005 | 40.9 (0.5) |
| KNHANES VI (2013–2014) | 4251 | 26.4 (0.5) | 5868 | 26.7 (0.4) |
| Age | ||||
| 19–40 | 5719 | 42.3 (0.6) | 7870 | 38.3 (0.5) |
| 40–59 | 6915 | 40.4 (0.5) | 9434 | 39.7 (0.4) |
| 60+ | 5968 | 17.4 (0.3) | 7977 | 22.0 (0.4) |
| Education | ||||
| Elementary school | 3424 | 12.2 (0.3) | 8208 | 24.9 (0.4) |
| Middle school | 2226 | 10.0 (0.3) | 2593 | 10.0 (0.2) |
| High school+ | 12 952 | 77.8 (0.4) | 14 480 | 65.1 (0.5) |
| Equivalised household income‡ | ||||
| 1T | 5931 | 26.8 (0.5) | 9002 | 31.6 (0.5) |
| 2T | 6376 | 36.2 (0.5) | 8248 | 34.6 (0.5) |
| 3T | 6295 | 37.1 (0.6) | 8031 | 33.8 (0.6) |
| Marital status | ||||
| Single | 3109 | 26.1 (0.5) | 3070 | 17.3 (0.4) |
| Married | 14 495 | 69.4 (0.5) | 17 294 | 66.6 (0.4) |
| Divorced/separated/widowed | 998 | 4.6 (0.2) | 4917 | 16.1 (0.3) |
| Job | ||||
| Manual | 4811 | 28.7 (0.5) | 4002 | 18.5 (0.3) |
| Non-manual | 8952 | 48.2 (0.5) | 8022 | 31.2 (0.4) |
| Others | 4839 | 23.1 (0.4) | 13 257 | 50.3 (0.4) |
| Chronic disease | ||||
| 0 | 10 267 | 62.1 (0.4) | 12 526 | 54.8 (0.4) |
| 1 | 4976 | 24.6 (0.4) | 6691 | 25.7 (0.3) |
| 2+ | 3359 | 13.2 (0.3) | 6064 | 19.5 (0.3) |
| Obesity level by BMI | ||||
| Underweight (<18.5 kg/m2) | 596 | 3.0 (0.2) | 1417 | 6.7 (0.2) |
| Normal/overweight (18.5–<25 kg/m2) | 11 414 | 60.5 (0.4) | 16 524 | 66.0 (0.4) |
| Obese (25–<30 kg/m2) | 5944 | 32.2 (0.4) | 6276 | 22.9 (0.3) |
| Severe obesity (≥30 kg/m2) | 648 | 4.3 (0.2) | 1064 | 4.4 (0.2) |
| Weight perception | ||||
| Thin (somewhat/very) | 4051 | 21.3 (0.4) | 3707 | 13.9 (0.3) |
| Normal | 7660 | 39.5 (0.4) | 10 246 | 40.6 (0.4) |
| Somewhat fat | 5922 | 33.2 (0.4) | 8884 | 35.2 (0.4) |
| Very fat | 969 | 6.1 (0.2) | 2444 | 10.2 (0.2) |
| Low HRQoL | ||||
| Lowest quintile of EQ-5D score | 2619 | 10.0 (0.3) | 5914 | 18.9 (0.3) |
*Unweighted frequency.
†Weighted proportion (SE).
‡Equivalised household income was calculated as the total household income divided by the square root of the number of household members; these scores were divided into tertiles.
BMI, body mass index; HRQoL, health-related quality of life; KNHANES, Korean National Health and Nutrition Examination Survey.