ABSTRACT
A study on 55 healthy people who go for periodic consulting at friendship hospital were conducted from Dec 2002-to Dec 2003. They were divided into two groups: 1st group: 33 people > 60years old, 2nd group: 22 people from 45 to 60 years old. The result showed that the rate on sex is rather equivalent between two groups. There is no difference between two groups on the number of thrombocyte and thrombocyte condensation. The rate of thrombocyte condensation in group from 60 to <75 years old is higher than group from 45 to <60 years old with p<0.05. The rate of thrombocyte condensation in the group of 75 years or more is higher than group from 45 to <60 years old with p<0.05. The rate of thrombocyte condensation in the group of 75 years upward is higher than group 60 to <75, p<0.05. The rate of thrombocyte condensation has directly proportional relation to the age.