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D R . E VA - M A R I A M E R Z
S A N Q U I N R E S E A R C H & V R I J E U N I V E R S I T E I T A M S T E R D A M , T H E N E T H E R L A N D S
A N TA LYA 3 N O V E M B E R 2 0 1 9
14/11/2019 DONORS 1
“Final donation for man whose blood saved 2.4M babies”
14/11/2019 DONORS 2
Research on (Blood) Donor Behaviour
•Identify determinants of onset, continuation and cessation of donating
•Influence donor behaviour via targeted marketing, recruitment and retention strategies
14/11/2019 BACKGROUND STUDY 3
Donors of Substances of Human Origin
•Help strangers repeatedly
•Personal costs
•Different motivations
•High degree of free-riding
•(Anonymous)
14/11/2019 DONORS 4
Donors in Europe and The Netherlands
14/11/2019 DONORS 5
Huis in ‘t Veld, De Kort, Merz (2019), Transfusion
•~330.000 VNRD (2018)
•~3.5% age eligible Dutch population
•80% whole blood donors
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Reasons for Withdrawal•Medical (e.g. repeated low Hemoglobin levels)
•Reaching the upper age limit
•Inactivation donor’s own request (personal reasons, without reasons)
•Lapse due to non-response to repeated invitations
Social cognitions and personality have been linked to a wide variety of illness behaviours including voluntary non-compliance.
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14/11/2019 BACKGROUND STUDY 6
Method•Donor Motivation: Dutch first time WB donor cohort study
•N = 2,964 (response rate 61%)
•Donor data base (eProgesa) for stop/continue data
METHOD 7
- + - - -
14/11/2019
Method
Cox regression analysis
METHOD
Reached age limit
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Donor Characteristics (N = 2,964)
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RESULTS14/11/2019
Donor Characteristics (N = 1,081)
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RESULTS14/11/2019
Hazard Ratios for Single Predictors
14/11/2019 RESULTS 11
Adjusted for age, gender,
blood group, # invitations,
# previous donations
Adjusted Hazard Ratios
14/11/2019 RESULTS 12
Adjusted for age, gender,
blood group, # invitations,
# previous donations
Conclusions
•Certain social cognitions more likely to stop donating on own request (before medical check and 1st donation)
•Lapse is not the opposite of return!
•Especially is high predictor intervention?
• is repeatedly shown to asscoiate with donor behaviour (i.e. no show and withdrawal)
•Personalize recruitment, intervention and retention
14/11/2019 CONCLUSION 13
Acknowledgement
- !
Wim de Kort
Anne van Dongen
Eamonn Ferguson
14/11/2019 ACKNOWLEDGEMENT 14