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Table 3 Stepwise multivariable logistic regression model for the associations of socio-demographic and behavioural factors with overweight/obesity

From: Differential prevalence and associations of overweight and obesity by gender and population group among school learners in South Africa: a cross-sectional study

Variables

Basic model

Expanded model

OR

95% CI

P-value

OR

95% CI

P-value

Gender

 Boys

1

  

1

  

 Girls

2.53

1.94–3.32

<0.0001

2.51

1.92–3.29

<0.0001

Age groups, years

  

0.325

  

0.325

 7–9

1

  

1

  

 10–12

1.16

0.75–1.80

0.509

1.21

0.78–1.87

0.404

 13–15

1.36

0.89–2.07

0.161

1.39

0.91–2.12

0.132

 16–18

1.40

0.87–2.24

0.167

1.45

0.90–2.33

0.130

Population groups

  

0.019

  

0.019

 Coloured

1

  

1

  

 Black

1.33

1.02–1.72

0.032

1.35

1.04–1.75

0.024

 White

1.48

0.98–2.25

0.063

1.45

0.96–2.21

0.080

Region

  

0.540

   

 Rural

1

     

 Semi-urban

1.36

0.81–2.25

0.242

-

-

-

 Urban

1.50

0.89–2.53

0.130

-

-

-

Eating breakfast

 No

1

     

 Yes

0.83

0.63–1.08

0.165

-

-

-

Physical inactivity

 No

1

  

1

  

 Yes

1.32

1.01–1.72

0.047

1.32

1.01–1.72

0.047

Sedentary behaviour

 No

1

     

 Yes

1.21

0.86–1.70

0.284

-

-

-

Smoking

 No

1

     

 Yes

0.80

0.48–1.33

0.396

-

-

-

Alcohol

 No

1

     

 Yes

0.97

0.67–1.41

0.873

-

-

-

  1. Gender: adjusted for age and population groups; Age group: adjusted for gender and population group; Population group: adjusted for gender and age group; Physical inactivity: adjusted for gender, age and population groups; Physical inactivity: Sport and/or walking ≤2 days/week