Age Group Unadjusted HR (95% CI) R2 for Trend Adjusted HR (95% CI)* R2 for Trend 35- 64 yrs 1.11 (0.98-1.27) 0.09 1.08 (0.93-1.25) 0.05 65-74 yrs 1.24 (0.98-1.27) 0.22 1.24 (1.16-1.32) 0.08 ≥ 75 yrs 4.65 (4.56-4.73) 0.48 1.20 (1.18-1.23) 0.15 Total 1.18 (1.16-1.20) 0.22 1.15 (1.13-1.18) 0.41 *Model adjusted for demographic characteristics, medical co-morbidity and hospital characteristics.

Table 4: Unadjusted and adjusted cox proportional hazard ratios of Dementia hospitalization by age group from 1999-2008.