Table 3.

Cox regression analysis of age and patient address as a predictor for survival. Hazard ratios (HR) and 95% confidence intervals (CI) are shown

Variables in the regression model	Unadjusted HR	95% CI	p value	Adjusted HR	95% CI	p value
Age less than 4 years	2.455	1.446 to 4.167	0.001	2.533	1.491 to 4.305	0.001
Address in the high-volume health region	1.722	1.012 to 2.931	0.045	1.798	1.057 to 3.059	0.030