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 1	Model 2	Model 3	Model 1	Model 2	Model 3
Main effects
Age	0.215***	0.055+	0.048	0.493***	1.158***	1.147***
Age2	−0.003***	−0.007***	−0.006***	−0.001**	0.016***	0.016***
Manual social class	0.385+	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×age		0.167***	0.160***		−0.672***	−0.682***
1950s×age2		0.003**	0.003**		−0.002	−0.002
1930s×age		0.183***	0.175***		−1.452***	−1.464***
1930s×age2		0.003**	0.004**		0.001	0.001
Social class×age
Manual×age			0.023*			0.03*
Manual×age2			−0.001*			−0.000
Constant	29.928***	28.496***	28.314***	56.980***	62.605***	62.363***
Random effects
Random intercept area	0.413	0.417	0.400	0.955	0.930	0.927
Random intercept person	5.274	5.274	5.271	6.828	6.886	6.885
Random slope age	0.150	0.150	0.149	0.174	0.180	0.179
Correlation intercept slope	0.732	0.730	0.732	0.810	0.802	0.803
Residual	1.748	1.742	1.742	3.497	3.370	3.370
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)		360.57	9.72
p Value forχ2		<0.0001	0.0006		<0.0001	0.0077

*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.