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Analysis of donor return behavior. Retrovirus Epidemiology Donor Study
H E Ownby1, F Kong, K Watanabe
1American Red Cross Blood Services, Southeastern Michigan Region, Detroit, USA. heownby@delphi.com
Transfusion
|October 26, 1999
Summary
Shorter intervals between first whole-blood donations and higher education levels predict more frequent blood donations. Older age and education are key factors influencing donor return rates and overall donation frequency.
Area of Science:
- Public Health
- Biomedical Science
- Health Services Research
Background:
- Persistent blood shortages are linked to low public motivation and inefficient donor recruitment.
- Understanding first-time donor behavior is crucial for improving blood supply stability.
Purpose of the Study:
- To investigate the relationship between donation frequency, timing of subsequent donations, and donor demographics among first-time whole-blood donors.
- To identify demographic factors influencing donor retention and donation rates.
Main Methods:
- Analysis of demographic characteristics for 879,816 first-time whole-blood donors.
- Application of Cox proportional-hazards regression models to assess return times.
- Utilized a recurrent-event Cox model to simultaneously evaluate multiple return instances.
Main Results:
- Shorter intervals between the first two donations correlated with increased likelihood of subsequent donations.
- Higher education levels were associated with a greater proportion of repeat donors.
- Older age and higher education levels predicted increased donation rates and return frequency.
Conclusions:
- The time to the second donation significantly impacts the total number of donations and subsequent return rates.
- Age emerged as the most potent predictor for high donation frequency and early returns.
- Interdonation intervals offer insights into donor behavior, aiding recruitment and retention strategies.