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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