Table 1.
General characteristics of the study population of Korean adults, aged 20 years or over, from the Korean Health and Nutrition Examination Survey VI (2013–2015)*
| BMI (kg/m2) | |||||
|---|---|---|---|---|---|
| Variable | n | % | Mean | sd | P value |
| Dinner companion | <0·001 | ||||
| With family | 8553 | 62·26 | 23·62 | 0·05 | |
| With others | 1501 | 14·43 | 23·87 | 0·11 | |
| Alone | 3249 | 23·30 | 24·05 | 0·08 | |
| Age (years) | <0·001 | ||||
| 20–29 | 1413 | 16·97 | 22·76 | 0·12 | |
| 30–39 | 2176 | 19·45 | 23·58 | 0·09 | |
| 40–49 | 2413 | 20·98 | 23·93 | 0·08 | |
| 50–59 | 2617 | 19·63 | 24·18 | 0·07 | |
| 60–69 | 2403 | 12·16 | 24·34 | 0·08 | |
| 70+ | 2281 | 10·81 | 23·85 | 0·09 | |
| Gender | <0·001 | ||||
| Male | 5381 | 46·65 | 24·32 | 0·06 | |
| Female | 7922 | 53·35 | 23·26 | 0·05 | |
| Household income | 0·162 | ||||
| Q1 (low) | 2628 | 15·48 | 24·11 | 0·10 | |
| Q2 | 3370 | 24·83 | 23·77 | 0·08 | |
| Q3 | 3610 | 29·45 | 23·76 | 0·07 | |
| Q4 (high) | 3695 | 30·23 | 23·55 | 0·07 | |
| Marital status | <0·001 | ||||
| Married | 9639 | 68·99 | 23·89 | 0·04 | |
| Widowed | 1327 | 6·87 | 24·25 | 0·12 | |
| Divorced | 534 | 3·83 | 23·76 | 0·18 | |
| Unmarried | 1803 | 20·31 | 23·10 | 0·11 | |
| Living alone | 0·758 | ||||
| Yes | 1360 | 8·33 | 24·08 | 0·12 | |
| No | 11 943 | 91·67 | 23·72 | 0·04 | |
| Educational level | <0·001 | ||||
| Middle school or less | 4713 | 26·72 | 24·33 | 0·06 | |
| High school | 4350 | 36·75 | 23·69 | 0·07 | |
| College or over | 4240 | 36·53 | 23·39 | 0·07 | |
| Occupation | 0·347 | ||||
| White collar | 2862 | 25·13 | 23·52 | 0·08 | |
| Pink collar | 1643 | 13·33 | 23·85 | 0·10 | |
| Blue collar | 3136 | 23·24 | 24·29 | 0·07 | |
| Unemployed | 5662 | 38·30 | 23·55 | 0·07 | |
| Average sleep hours per day | <0·001 | ||||
| <6 | 2240 | 15·30 | 24·23 | 0·09 | |
| 6–7 | 3636 | 27·52 | 23·96 | 0·07 | |
| 7–8 | 3708 | 28·88 | 23·58 | 0·06 | |
| >8 | 3719 | 28·31 | 23·47 | 0·08 | |
| Average sedentary hours per day | 0·011 | ||||
| <5 | 3925 | 28·74 | 23·79 | 0·06 | |
| 5–9 | 5106 | 37·44 | 23·71 | 0·06 | |
| >9 | 4272 | 33·82 | 23·78 | 0·07 | |
| Smoker | |||||
| Current | 2322 | 21·18 | 24·21 | 0·08 | 0·458 |
| Past | 2677 | 20·23 | 24·16 | 0·08 | |
| Never | 8304 | 58·59 | 23·45 | 0·05 | |
| Alcohol consumption frequency | 0·487 | ||||
| Never | 4042 | 25·47 | 23·81 | 0·07 | |
| Once/month or less | 3769 | 28·70 | 23·47 | 0·07 | |
| 2–4 times/month | 2815 | 23·89 | 23·67 | 0·08 | |
| Twice/week or more | 2677 | 21·94 | 24·15 | 0·07 | |
| Total energy intake | |||||
| <7513 kJ (<1800 kcal) | 6405 | 44·08 | 23·67 | 0·06 | 0·074 |
| 7535–10 456 kJ (1801–2499 kcal) | 3980 | 30·37 | 23·65 | 0·07 | |
| ≥10 460 kJ (≥2500 kcal) | 2918 | 25·55 | 24·03 | 0·08 | |
| Year | 0·191 | ||||
| 2013 | 4593 | 33·68 | 23·71 | 0·07 | |
| 2014 | 4343 | 32·68 | 23·69 | 0·07 | |
| 2015 | 4367 | 33·64 | 23·85 | 0·07 | |
| TOTAL | 13 303 | 100·00 | 23·75 | 0·04 | |
*
Complex study design, including survey weights, was considered.