Graphical representation of the conditional model 2 Graphical representation of the conditional model 2. Β0j indicates intercept, β1j indicates slope, Pop_bline and Dep_bline indicate population size and deprivation at baseline (2009/2010), Q2–4 indicate quarterly, seasonal estimates and Policy 2–4 indicate effect of low, medium and high cumulative (relative to none) policy on intercept and slope. Graphical representation of the conditional model 2. Β0j indicates intercept, β1j indicates slope, Pop_bline and Dep_bline indicate population size and deprivation at baseline (2009/2010), Q2–4 indicate quarterly, seasonal estimates and Policy 2–4 indicate effect of low, medium and high cumulative (relative to none) policy on intercept and slope. Empty boxes indicate repeated measures within a lower tier local authority. F de Vocht et al. J Epidemiol Community Health 2016;70:231-237 ©2016 by BMJ Publishing Group Ltd