Hazard ratios and model statistics of the shared frailty survival model with the interaction terms of the dichotomised areal factors (Model 5B).

Estimate: estimated hazard ratios for the factors and estimated values for the model statistics (Model 5B: adjusted by age, sex, public health centre district, histories of diabetes and hypertension, and body mass index); Qs = Quartiles, CI = confidence interval; Explained geographical variance: percentage of reduction in Theta of fitted models compared to Model 0 shown in Table 2; Difference in AIC: the subtraction of AIC of fitted model from AIC of Model 0 shown in Table 2.