Table 3

Regression coefficients from multilevel models for expected BMI in kg/m2 and WHtR for women in the three cohorts of the West of Scotland Twenty-07 study, 1987–2008

BMI†WHTR‡
Model 1Model 2Model 3Model 1Model 2Model 3
Main effects
 Age0.215***0.055+0.0480.493***1.158***1.147***
 Age2−0.003***−0.007***−0.006***−0.001**0.016***0.016***
 Manual social class0.385+0.388+0.961***0.998***0.964**1.709***
 1950s cohort−3.721***−2.171***−7.827***−6.874***−12.984***−13.246***
 1930s cohort−6.336***−5.076***−5.364***−11.971***−10.704***−11.055***
Interactions
Cohort×age
 1950s×age0.167***0.160***−0.672***−0.682***
 1950s×age20.003**0.003**−0.002−0.002
 1930s×age0.183***0.175***−1.452***−1.464***
 1930s×age20.003**0.004**0.0010.001
Social class×age
 Manual×age0.023*0.03*
 Manual×age2−0.001*−0.000
Constant29.928***28.496***28.314***56.980***62.605***62.363***
Random effects
 Random intercept area0.4130.4170.4000.9550.9300.927
 Random intercept person5.2745.2745.2716.8286.8866.885
 Random slope age0.1500.1500.1490.1740.1800.179
 Correlation intercept slope0.7320.7300.7320.8100.8020.803
 Residual1.7481.7421.7423.4973.3703.370
Likelihood−21 066.572−21 053.371−21 045.915−25 399.418−25 219.131−25 214.27
χ2 (df)26.40 (4)14.91 (2)360.579.72
p Value forχ2<0.00010.0006<0.00010.0077
  • *p<0.05, **p<0.01, ***p<0.001.

  • †Measurement occasions N=8417, individuals N=2245, areas N=62.

  • ‡Measurement occasions N=8347, individuals N=2244, areas N=62.

  • BMI, body mass index, WHtR, waist-to-height ratio.