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Table 1 Descriptive characteristics of a sample of young South Korean adults aged 20 to 39 years --2010–12 Korea National Health and Nutrition Examination Survey (KNHANES) (N = 6055)

From: Body weight misperception and psychological distress among young South Korean adults: the role of physical activity

  Total (Mean ± SD) (N = 6055) Men (Mean ± SD) (n = 2572) Women (Mean ± SD) (n = 3483)
Age (years) 30.06 ± 5.5 29.93 ± 5.5 30.21 ± 5.5
Body mass index (kg/m2) 23.17 ± 3.7 24.20 ± 3.6 21.99 ± 3.5
  Total (%) Men (%) Women (%)
Education
  ≥ Post-sec graduate 47.9 50.3 45.1
Household incomea
 Quartile 1 8.3 8.9 7.6
 Quartile 2 27.7 27.1 28.3
 Quartile 3 35.0 35.5 34.3
 Quartile 4 29.1 28.4 29.7
Marital status
 Never married 49.9 56.5 42.2
 Married living with spouse 48.3 42.5 55.0
 Previously marriedb 1.8 1.0 2.8
Employment status (unemployed)c 34.1 22.2 47.5
Area of residenced
 Metro Seoul 29.5 28.5 30.7
 Non-Metro Seoul 70.5 71.5 69.3
Self-rated health
 Healthy 42.7 47.0 37.7
 Neutral 48.4 45.1 52.1
 Not healthy 8.9 7.9 10.2
Currently smoking 32.3 52.9 8.9
High-risk drinkinge 16.9 23.0 10.0
Physical activity
 Vigorous-intensity ≥ 20 min/session, ≥ 3 day/week 15.5 19.5 11.0
 Moderate-intensity ≥ 30 min/session, ≥ 5 day/week 9.5 11.7 6.9
 Walking ≥ 30 min/session, ≥ 5 day/week 43.5 47.0 39.4
 Muscular strengthening ≥ 2 day/week 22.5 32.3 11.2
Body Mass Index (kg/m2)
 Underweight < 18.5 7.5 2.9 12.7
 Normal 18.5–22.9 39.3 30.5 49.2
 Overweight 23–24.9 26.2 30.6 21.0
 Obese ≥ 25 27.1 35.9 17.1
Body weight perception
 Under-perception 43.3 66.9 16.3
 Accurate-perception 48.9 32.2 68.0
 Over-perception 7.7 0.8 15.6
Psychological distress
 Stressed 30.9 27.8 34.4
 Depressed 9.5 6.8 12.7
 Suicidal ideation 10.9 6.5 16.0
  1. aIncome quartiles were calculated based on standardized income (total monthly household income divided by the square root of the number of household members)
  2. bPreviously married included individuals who are divorced or separated from their spouse by death or other reasons
  3. cUnemployed status included students and housewives
  4. dMetro Seoul included Seoul, Incheon metropolitan cities, and Gyeonggi province
  5. eHigh-risk drinking: ≥ 7 cups/occasion and ≥ twice/week for men; ≥ 5 cups/occasion and ≥ twice/week for women [23]