P-

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

•

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.

-

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

- - - -

Donor Characteristics (N = 2,964)

-

RESULTS14/11/2019

Donor Characteristics (N = 1,081)

-

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