Study published: No proven effect of personalised study invitations


A study recently published in BMC Medical Research Methodology has compared the recruitment of study participants through personalised and non-personalised study invitations.

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No proven effect
The study was conducted as a so-called ‘study within a trial’ in which invitation letters were sent to potential participants in the ENGAGE study, which was aimed at parents of children treated for cancer. 254 potential participants received personalised study invitations, while a control group of 255 potential participants received non-personalised study invitations.

30 people (11.8 %) who received a personalised invitation chose to participate in the study, while 26 people (10.2 %) in the control group chose to participate. The difference between the two groups was not statistically significant.

Photo of Ella Thiblin
PhD candidate Ella Thiblin.

Ella Thiblin is one of the authors of the paper:

– We could not show any effect of personalised study invitations. At the same time, there was a limited number of people who received invitations. And in absolute figures, more people who received personalised invitations chose to participate. So we cannot completely rule out that personalised study invitations may have a certain effect.

Read the full paper ‘The effect of personalised versus non-personalised study invitations on recruitment within the ENGAGE feasibility trial: an embedded randomised controlled recruitment trial’. It is written by Ella Thiblin, Joanne Woodford, Mattias Öhman, and Louise von Essen.

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Last modified: 2022-05-25