Table 2 Obesity prevalence rate (%) by educational level and sex: Korea National Health and Nutrition Examination Survey, 2010–2012

All participants

31.9

(1.3)

38.0

(1.3)

40.5

(1.3)

<.001

39.7

(1.0)

30.0

(1.2)

17.1

(1.0)

<.001

Smoking status

<.001*

<.001*

 Non-smoking

34.3

(1.6)

36.4

(1.8)

40.5

(1.7)

.04

40.3

(1.0)

29.5

(1.2)

16.9

(1.0)

<.001

 Smoking

28.4

(2.1)

36.6

(1.8)

40.5

(2.0)

<.001

30.5

(3.7)

34.6

(4.3)

21.4

(5.2)

.15

Risk from drinking alcohol

<.001*

<.001*

 No or low risk

29.7

(1.6)

31.3

(1.7)

35.5

(1.9)

.05

38.6

(1.1)

29.9

(1.4)

18.1

(1.2)

<.001

 Medium or higher risk

35.2

(2.3)

42.2

(1.7)

43.7

(1.7)

.02

44.7

(2.5)

30.1

(2.1)

15.4

(1.6)

<.001

Physical exercise

<.001*

<.001*

 Active

34.1

(2.8)

38.6

(2.8)

39.5

(2.6)

.41

41.6

(2.4)

32.6

(2.5)

25.0

(3.4)

<.001

 Inactive

31.4

(1.5)

37.8

(1.5)

40.8

(1.4)

<.001

39.3

(1.1)

29.4

(1.3)

15.8

(1.0)

<.001

Sleep duration

<.001*

<.001*

 Long

31.2

(1.7)

38.0

(1.5)

39.0

(1.7)

.01

39.6

(1.3)

28.5

(1.4)

15.2

(1.2)

<.001

 Short

32.8

(2.0)

37.9

(2.0)

42.6

(1.8)

<.01

39.8

(1.4)

32.4

(1.8)

21.1

(1.8)

<.001

Energy intake

<.001*

<.001*

 Not under-reported

26.8

(1.5)

33.7

(1.5)

37.2

(1.5)

<.001

36.1

(1.1)

26.0

(1.2)

14.8

(1.0)

<.001

 Under-reported

45.2

(2.7)

49.3

(2.6)

49.6

(2.4)

.48

56.9

(2.5)

46.6

(2.9)

29.6

(3.0)

<.001

Stress

<.001*

<.001*

 Not stressful

31.7

(1.4)

36.7

(1.4)

39.9

(1.6)

<.001

39.1

(1.2)

28.5

(1.3)

16.7

(1.2)

<.001

 Stressful

32.6

(3.2)

42.1

(2.7)

41.9

(2.2)

.06

41.1

(1.8)

33.5

(2.2)

18.0

(1.8)

<.001