Fig. 2

Predicted stratum-level residuals regarding GDRS with 95% confidence intervals obtained from model 2. Stratum ranks were: 1 women with high educational level and no history of migration; 2 men with low educational level and history of migration; 3 men with middle educational level and history of migration; 4 men with middle educational level and no history of migration; 5 women with high educational level and history of migration; 6 women with low educational level and history of migration; 7 women with middle educational level and no history of migration; 8 women with low educational level and no history of migration; 9 men with high educational level and no history of migration; 10 men with low educational level and no history of migration; 11 men with high educational level and history of migration; 12 women with middle educational level and history of migration. (See Additional file 2: Figure S1 for a version with labelling grid sorted by stratum ID)