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Table 2 Generalized linear mixed model of daily consumption of fruit and vegetables with fixed effects

From: A school based study of time trends in food habits and their relation to socio-economic status among Norwegian adolescents, 2001–2009

  Daily fruit Daily vegetables  
  Model 1 Model 2 Model 1 Model 2  
Fixed effects OR 95% CI p-value OR 95% CI p-value OR 95% CI p-value OR 95% CI p-value
Intercept 0.47 0.43- 0.51 <.001 0.48 0.44-0.53 <.001 0.32 0.29-0.35 <.001 0.32 0.29-0.36 <.001
Female 1.82 1.71-1.94 <.001 1.72 1.53-1.95 <.001 1.46 1.36-1.57 <.001 1.43 1.26-1.62 <.001
Age?=?16 0.43 0.38-0.47 <.001 0.36 0.31-0.42 <.001 0.57 0.51-0.64 <.001 0.48 0.42-0.56 <.001
Age?=?15 0.62 0.56-0.69 <.001 0.59 0.52-0.68 <.001 0.67 0.61-0.75 <.001 0.67 0.57-0.77 <.001
Age?=?13 0.73 0.66-0.81 <.001 0.77 0.67-0.88 <.001 0.76 0.68-0.84 <.001 0.83 0.72-0.96 .011
2005 vs 2001 1.76 1.61-1.92 <.001 1.99 1.61-2.46 <.001 1.51 1.37-1.66 <.001 1.67 1.30-2.15 <.001
2009 vs 2005 0.97 0.89-1.06 .486 0.89 0.72-1.11 .312 1.01 0.92-1.11 .793 1.00 0.78-1.30 .977
SES 1.47 1.32-1.65 <.001 1.47 1.31-1.64 <.001 1.40 1.24-1.58 <.001 1.41 1.24-1.60 <.001
Female ’ age?=?16     1.34 1.10-1.62 .003     1.34 1.12-1.62 .002
Female ’ age?=?15     1.09 0.91-1.30 .346     1.02 0.84-1.24 .853
Female ’ age?=?13     0.92 0.77-1.10 .336     0.84 0.70-1.01 .060
Female ’ 2005/2001     0.94 0.81-1.10 .422     0.97 0.82-1.15 .676
Female ’ 2009/2005     1.07 0.91-1.25 .402     0.92 0.78-1.08 .291
Age?=?16 ’ 2005/2001     0.86 0.67-1.10 .238     0.92 0.70-1.21 .562
Age?=?15 ’ 2005/2001     0.96 0.75-1.22 .746     1.04 0.80-1.36 .757
Age?=?13 ’ 2005/2001     0.85 0.68-1.08 .183     0.93 0.72-1.22 .612
Age?=?16 ’ 2009/2005     0.96 0.74-1.24 .737     1.13 0.85-1.48 .406
Age?=?15 ’ 2009/2005     1.27 0.99-1.61 .054     1.19 0.92-1.53 .192
Age?=?13 ’ 2009/2005     1.20 0.94-1.52 .141     1.00 0.78-1.29 .989
SES ’ 2005/2001     0.99 0.77-1.27 .920     0.90 0.68-1.18 .436
SES ’ 2009/2005    0.91 0.69-1.22 .538     0.98 0.71-1.36 .905  
  1. OR ’ odds ratio; CI ’ confidence interval; the reference group for gender was boys and for age 11’year olds.