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1 Institute of Transfusion Medicine, 2 Institute for Community Medicine, University of Greifswald

Table 1: Distribution of gender and year of birth depending on donation frequency within the study interval ( n.s.: not significant). Figure 1: study participation. 4014 donors asked to participate. 2596 participated. 535 had already paticipated. 883 refused participation. 2468

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1 Institute of Transfusion Medicine, 2 Institute for Community Medicine, University of Greifswald

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  1. Table 1: Distribution of gender and year ofbirth depending on donation frequency within the study interval (n.s.: not significant) Figure 1: study participation 4014 donors asked to participate 2596 participated 535 had already paticipated 883 refused participation 2468 eligible for donation 128 not eligible for donation 62 questionnaire only 2345 questionnaire + blood sample 61 blood sample only The Greifswald Blood Donor Study (GREBDOS): A tool for comparing blood donors with the general population Lubenow N1, Konerding U2, Alpen U1, Bezold K2, Hoffmann W2, Kohlmann T2, Greinacher A1 1Institute of Transfusion Medicine, 2Institute for Community Medicine, University of Greifswald Background Facing major demographic changes (Greinacher et al. 2006), which will cause an increased need for blood transfusion, strategies to motivate donors will be of great importance to secure blood supply. However, few data for comparing blood donors with the general population exist. This makes it difficult to outline strategies for blood donor motivation. In the region of Western Pomerania (north-east Germany) the general population was well characterised by the Study of Health in Pomerania (SHIP, John et al. 2001). We report the design and first results of a study comparing the population of blood donors with the general population within the same region: The Greifswald Blood Donor Study (GREBDOS). Methods In GREBDOS over 12 months each 6th person enrolling for blood donation was asked to participate in the study. If this person refused or had already participated, the next 6th person was asked. Complete participation comprised 1) to fill in a structured questionnaire which contained a selection of questions posed in SHIP (see questionnaire attached to poster) and 2) to give a blood sample. To correct for multiple donations the number of donations given within the study interval was recorded for each participant at the end of the study period. Results Figure 1 gives an overview of agreement/refusal to partcipate in the study. Uncorrected for multiple donations the participants’ mean age was 30.2 years (SD=10.3) and the number of females 1 234 (50.0%). Table 1 shows comparison of the study sample with the overall donor population. Conclusions This analysis shows the importance of considering potential biases in blood donor surveys due to multiple donations. Additionally, females were overrepresented, as they were more willing to participate. Our study will make comparisons of blood donor characteristics with the general population (SHIP) feasible. GREBDOS will become instrumental for planning future donor recruitment programs. Greinacher A, Fendrich K, Alpen U, Hoffmann W. Impact of demographic changes on the blood supply – Mecklenburg-West Pomerania as a model region for Europe. Transfusion 2006, in press John U, Greiner B, Hensel E, Ludemann J, Piek M, Sauer S, Adam C, Born G, Alte D, Greiser E, Haertel U, Hense HW, Haerting J, Willich S, Kessler C. Study of Health In Pomerania (SHIP): a health examination survey in an east German region: objectives and design. Soz Praventivmed 2001;46(3):186-94

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