We are updating the design of this site. Learn more.
Show more
ClinicalTrials.gov Menu

Retaining Donors and Increasing Donation Frequency

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: May 26, 2000
Last Update Posted: April 11, 2016
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
National Heart, Lung, and Blood Institute (NHLBI)
Information provided by:
Bloodworks (Puget Sound Blood Center)
To retain individuals as blood donors once they have entered the voluntary blood donation system and to increase the frequency of their donations.

Blood Donors

Study Type: Observational

Resource links provided by NLM:

Further study details as provided by Bloodworks (Puget Sound Blood Center):

Study Start Date: September 1990
Estimated Study Completion Date: December 1994
Primary Completion Date: December 1993 (Final data collection date for primary outcome measure)
Detailed Description:


The study continued research previously funded as part of a National Research and Demonstration Center (NRDC) in Transfusion Medicine.


There were six components to the study. The first identified significant factors influencing regular blood donations by individuals with different donation histories - first-time, second-time, committed (frequent), and lapsed donors. The second component developed and assessed the validity of behavioral models to increase donor retention and to predict whether first and second time donors would contribute again. The third developed donor-retention interventions, especially for the first and second time donors. The fourth component identified homogeneous subgroups among first, second and committed donors who might be receptive to different types of intervention strategies to increase the frequency of their donations. The fifth component evaluated the success of cost-effectiveness of the new interventions compared to existing blood center maintenance strategies. The sixth identified whether or not donors had a limit or ceiling on how often they donated per year.

The investigators drew on two related social psychological theories to combine cognitive and behavioral approaches to blood donor retention and to use the findings to construct a multiattribute model of donor decision-making. A behavioral decision model was used to predict donor behavior prospectively and to target and direct the design of interventions to increase donor retention and the frequency of donations.

Approximately 33 percent of the total project supported the subproject on retaining donors.


Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Ages Eligible for Study:   up to 100 Years   (Child, Adult, Senior)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No
No eligibility criteria
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00005721

Sponsors and Collaborators
Bloodworks (Puget Sound Blood Center)
National Heart, Lung, and Blood Institute (NHLBI)
OverallOfficial: Tracy Bier Bloodworks (Puget Sound Blood Center)