Abstract
Background and Objectives
Iranian Blood  Transfusion Organization, based on international requirements, for the protection of blood donors and recipients, has approved some criteria for the selection of donors. This inevitably rejects a number of donors from blood donations. This process leads to the promotion of blood safety, but at the same time it loses some donors and reduces the likelihood of a donor's return. This study intends to determine the return rate of  blood donors who have been temporarily rejected from blood donation and to compare it with the return rate of donors without any previous rejection.
 
Materials and Methods
This research  is cross-sectional descriptive study and the data were extracted from the blood donation data registered in the online database of IBTO. The data were analyzed by software.
 
Results
A temporary rejection for blood donation in donors during the period from 2012 to the end of 2014 has reduced their return compared with those who did not have any rejection from 61.9% to 43.6%. For those who have been rejected from blood donation due to high-risk behaviors (421428 donations), the return rate was slightly down to 27.4%.
 
Conclusions 
The result of this study showed that the return  rate  of  rejected donors was 1.5 times less than the return rate of accepted donors, and this difference was much lower for donors who were rejected due to high-risk behaviors.