The University of Southampton
University of Southampton Institutional Repository

Email invitations to general practitioners were as effective as postal invitations and were more efficient.

Treweek, Shaun, Barnett, Karen, MacLennan, Graeme, Bonetti, Debbie, Eccles, Martin, Francis, Jill, Jones, Claire, Pitts, Nigel, Ricketts, Ian, Weal, Mark and Sullivan, Frank (2012) Email invitations to general practitioners were as effective as postal invitations and were more efficient. Journal of Clinical Epidemiology, 65, (7), Summer Issue

Record type: Article


Objective: To evaluate which of two invitation methods, email or post, was most effective at recruiting general practitioners to an online trial. Study design and setting: Randomised controlled trial. Participants were general practitioners in Scotland, UK. Results: 270 general practitioners were recruited. Using email did not improve recruitment (risk difference = 0.7% (95% confidence interval -2.7% to 4.1%)). Email was, however, simpler to use and cheaper, costing £3.20 per recruit compared to £15.69 for postal invitations. Reminders increased recruitment by around 4% for each reminder sent for both invitation methods. Conclusions: In the Scottish context, inviting general practitioners to take part in an online trial by email does not adversely affect recruitment and is logistically easier and cheaper than using postal invitations.

Full text not available from this repository.

More information

Published date: 2012
Keywords: recruitment, randomised controlled trials, email, primary care
Organisations: Web & Internet Science


Local EPrints ID: 273154
PURE UUID: 542dc2e1-df98-4022-b0a2-505adca52deb
ORCID for Mark Weal: ORCID iD

Catalogue record

Date deposited: 01 Feb 2012 14:25
Last modified: 18 Jul 2017 06:16

Export record


Author: Shaun Treweek
Author: Karen Barnett
Author: Graeme MacLennan
Author: Debbie Bonetti
Author: Martin Eccles
Author: Jill Francis
Author: Claire Jones
Author: Nigel Pitts
Author: Ian Ricketts
Author: Mark Weal ORCID iD
Author: Frank Sullivan

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.