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Table 4 Interaction effect of education and each lifestyle behavior on obesity in women (N = 9333): Korea National Health and Nutrition Examination Survey, 2010–2012

From: Modifying effects of education on the association between lifestyle behaviors and the risk of obesity: evidence from South Korea

Characteristics

Junior high school or less

Senior high school

College or higher

p for interaction

Education trend for each group

OR

(95 % CI)

OR

(95 % CI)

OR

(95 % CI)

OR

(95 % CI)

p for trend

Smoking status

      

<.001

   

 Non-smoking

1.00

 

0.81

(0.67–0.97)

0.49

(0.39–0.62)

 

0.72

(0.64–0.80)

<.001

 Smoking

0.68

(0.47–0.98)

1.14

(0.75–1.73)

0.67

(0.35–1.29)

 

0.79

(0.66–0.94)

.01

Risk from drinking alcohol

      

<.001

   

 No or low risk

1.00

 

0.91

(0.75–1.11)

0.59

(0.47–0.76)

 

0.71

(0.64–0.80)

<.001

 Medium or higher risk

1.37

(1.09–1.71)

0.99

(0.77–1.28)

0.50

(0.36–0.70)

 

0.72

(0.64–0.81)

<.001

Physical exercise

      

<.001

   

 Inactive

1.00

 

0.86

(0.71–1.04)

0.48

(0.38–0.60)

 

0.70

(0.63–0.78)

<.001

 Active

1.12

(0.89–1.41)

0.98

(0.75–1.28)

0.82

(0.55–1.22)

 

0.80

(0.70–0.91)

<.01

Sleep duration

      

<.001

   

 Long

1.00

 

0.80

(0.64–0.99)

0.44

(0.34–0.58)

 

0.69

(0.62–0.77)

<.001

 Short

1.00

(0.86–1.15)

0.92

(0.74–1.15)

0.63

(0.48–0.82)

 

0.75

(0.67–0.84)

<.001

Energy intake

      

<.001

   

 Not under- reported

1.00

 

0.83

(0.69–1.01)

0.51

(0.40–0.65)

 

0.65

(0.58–0.73)

<.001

 Under- reported

2.25

(1.79–2.82)

2.18

(1.63–2.90)

1.23

(0.88–1.71)

 

0.99

(0.87–1.12)

.85

Stress

      

<.001

   

 Not stressful

1.00

 

0.81

(0.67–0.98)

0.50

(0.39–0.64)

 

0.71

(0.63–0.79)

<.001

 Stressful

0.96

(0.80–1.15)

0.97

(0.75–1.25)

0.54

(0.40–0.73)

 

0.74

(0.65–0.83)

<.001

  1. All analyses were conducted considering the complex survey design
  2. P value was obtained by the Wald test
  3. All estimates for all the interaction terms between education each health behavior were obtained from the multivariate logistic regression models, adjusted for age, marital status, residential area, employment status, equivalized household income, self-rated health, chronic disease, survey year, and the other lifestyle behaviors
  4. N number, OR odds ratio, CI confidence interval, Obesity body mass index ≥25