Transfusion · 1999 · 152 citations · 15 references
Time to return for second donation was associated with total number of donations made and with return rate for subsequent returns. Age was the strongest predictor of high donation frequency and early-return rate. Relationships between interdonation interval and the number of future donations may prove useful in understanding return behavior and developing donor recruitment and retention strategies.
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The Statistical Analysis of Failure Time Data
Walter R. Young · Journal of Quality Technology · 1981 · 1.7K citations
LOGISTIC REGRESSION IN SURVIVAL ANALYSIS
Robert D. Abbott · American Journal of Epidemiology · 1985 · 131 citations
Retention of “safe” blood donors. The Retrovirus Epidemiology Donor Study
R.A. Thomson, Jim Bethel, Akf Lo et al. · Transfusion · 1998 · 102 citations