Table 2

Regression coefficients from multilevel models for expected BMI in kg/m² and WHtR for men 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	0.204***	−0.066*	−0.098**	0.376***	0.696***	0.573***
Age²	−0.004***	−0.011***	−0.011***	−0.003***	0.004**	0.002
Manual social class	0.273	0.283	1.821***	0.781***	0.778**	4.900
1950s cohort	−2.904***	−1.148***	−1.003***	−3.640***	−7.395***	−6.298***
1930s cohort	−6.285***	−3.504***	−3.177***	−7.384***	−4.655***	−5.574***
Interactions
Cohort×age
1950s×age		0.246***	0.272***		−0.371***	−0.240***
1950s×age²		0.008***	0.008***		0.003	0.000
1930s×age		0.205***	0.270***		−0.961***	−0.602***
1930s×age²		0.009***	0.009***		0.008***	0.004+
Social class×age
Manual×age			0.100**			0.364***
Manual×age²			0.001			0.007***
Social class×age×cohort
Manual×1950			−1.020+			−3.722***
Manual×age×1950s			−0.091*			−0.375***
Manual×1930			−1.307*			−1.302
Manual×age×1930s			−0.139+			−0.654
Constant	29.902***	27.823***	27.312***	57.277***	60.264***	58.877***
Random effects
Random intercept area	5.92×10⁻⁷	1.91×10⁻⁶	2.80×10⁻⁶	2.38×10⁻⁶	1.86×10⁻⁵	2.66×10⁻⁶
Random intercept person	3.783	3.787	3.765	5.005	5.006	4.984
Random slope age	0.106	0.106	0.104	0.122	0.125	0.122
Correlation intercept slope	0.642	0.641	0.639	0.692	0.683	0.686
Residual	1.443	1.421	1.423	3.039	2.978	2.977
Likelihood	−15 870.553	−15 806.243	−15 792.049	−20 009.702	−19 922.066	−19 901.003
χ² (df)		128.62 (4)	28.39 (6)		175.27 (4)	42.13(6)
p Value for χ²		<0.0001	<0.0001		<0.0001	<0.0001

+p<0.10, *p<0.05, **p<0.01, ***p<0.001.
†Measurement occasions N=6951, individuals N=1943, areas N=62.
‡Measurement occasions N=6982, individuals N=1946, areas N=62.
BMI, body mass index, WHtR, waist-to-height ratio.