Variables  Younger Group Elderly Group
Number  100 35
RRT  75(75)  15(42)** 
 Myocardial Infarction  5(5)  4(12) 
Cerebrovascular  Diseases  5(5)  4(12) 
Heart Failure  10(10)  6(17) 
Neoplasma  5(5)  5(14) 
Others    1(3) 
Values are expressed as count (percentage). RRT, renal replacement therapy. **indicates P<0.01 compared with younger group.
Table 6: Comparison of events between patients in younger and elderly group.