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Table 1 Distribution (%) of study sample characteristics by education level among women: Korea National Health and Nutrition Examination Survey, 2010–2014 (N = 14,577)

From: Factors contributing to educational differences in obesity among women: evidence from South Korea

Characteristics Less-educated Highly-educated
Proportion (95% CI) Proportion (95% CI)
Obesity 34.3 (33.2-35.5) 16.0 (14.6-17.5)
Demographic
 Age, years
  25–34 8.8 (8.0-9.7) 41.3 (39.1-43.4)
  35–44 17.6 (16.6-18.7) 36.6 (34.7-38.6)
  45–54 26.6 (25.5-27.7) 16.5 (15.0-18.1)
  55–64 21.5 (20.5-22.4) 4.5 (3.8-5.2)
   ≥ 65 25.6 (24.5-26.7) 1.2 (0.9-1.5)
 Marital status
  Married 73.3 (72.1-74.4) 71.1 (69.0-73.1)
  Non-married 26.7 (25.6-27.9) 28.9 (26.9-31.0)
 Residential area
  Urban 76.7 (73.6-79.5) 90.7 (88.5-92.6)
  Rural 23.3 (20.5-26.4) 9.3 (7.5-11.5)
Socioeconomic
 Occupational status
  Not employed 50.8 (49.5-52.1) 42.6 (40.6-44.6)
  Employed 49.2 (47.9-50.5) 57.4 (55.4-59.4)
Household income
  Median or higher 43.4 (42.0-44.8) 73.0 (71.1-74.9)
  Below median 56.6 (55.2-58.0) 27.0 (25.1-28.9)
Lifestyle
 Current smoking
  Non-smoking 92.8 (92.0-93.4) 95.4 (94.5-96.2)
  Smoking 7.3 (6.6-8.0) 4.6 (3.8-5.5)
 Risk from alcohol intake
  No or low 73.4 (72.3-74.5) 64.3 (62.3-66.3)
  Medium or higher 26.6 (26.6-35.7) 35.7 (33.7-37.7)
 Walking exercise
  Inactive 65.2 (64.0-66.4) 64.4 (62.5-66.3)
  Active 34.8 (33.6-36.0) 35.6 (33.7-37.6)
 Self-perceived stress
  Not stressed 73.0 (72.0-73.9) 69.7 (68.0-71.4)
  Stressed 27.0 (26.1-28.0) 30.3 (28.6-32.0)
N 10,806   3771  
  1. Note: N number, Obesity body mass index ≥25, CI confidence interval
  2. Less-educated denoted high school education or less. Highly-educated denoted college degree or higher
  3. All analyses were conducted considering the complex survey design
  4. Non-married includes never-married, separated, widowed and divorced
  5. Not employed included participants who had no paid work
  6. Income was based on equivalized household income at each survey year