Hazard ratios and model statistics of the shared frailty survival models (Models 3 and 4).

<p>Estimate: estimated hazard ratios for the factors and estimated values for the model statistics (Models 3: adjusted by age, sex, public health centre district, histories of diabetes and hypertension, and body mass index; Model 4: adjusted by age, sex, public health centre district, histories of diabetes and hypertension, body mass index, smoking, alcohol intake, and regular sports habit); Qs = Quartiles, CI = confidence interval; trend p: p value of trend test; Explained geographical variance: percentage of reduction in Theta of fitted models compared to Model 0 shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0097802#pone-0097802-t002" target="_blank">Table 2</a>; Difference in AIC: the subtraction of AIC of fitted model from AIC of Model 0 shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0097802#pone-0097802-t002" target="_blank">Table 2</a>.