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Recruitment, screening, and baseline participant characteristics in the WALK 2.0 Study: A randomized controlled trial using web 2.0 applications to promote physical activity

journal contribution
posted on 2017-12-06, 00:00 authored by Cristina CaperchioneCristina Caperchione, Mitchell DuncanMitchell Duncan, R Rosenkranz, Corneel VandelanotteCorneel Vandelanotte, Anetta Van ItallieAnetta Van Itallie, T Savage, Cindy HookerCindy Hooker, A Maeder, William MummeryWilliam Mummery, G Kolt
Objective: To describe the recruitment methods and enrollment rates, the screening methods, and the baseline characteristics of a sample of adults participating in the WALK 2.0 Study, 3-arm randomized controlled trial of a Web 2.0 based physical activity intervention. Methods: A two-fold recruitment plan was developed and implemented, including a direct mail-out to an extract from the Australian Electoral Commission electoral roll, and other supplementary methods including email and telephone. Physical activity screening involved two steps: a validated single-item self-report instrument and the follow-up Active Australia Questionnaire. Readiness for physical activity participation was also based on a two-step process; administering the Physical Activity Readiness Questionnaire and, where needed, further clearance from a medical practitioner. Results: Across all recruitment methods, a total of 1,244 participants expressed interest in participating, of which 656 were deemed eligible. Of these, 504 were enrolled in the WALK 2.0 trial (77% enrollment rate) and randomized to the WALK 1.0 group (n = 165), the WALK 2.0 group (n =168), or the Logbook group (n = 171). Mean age of the total sample was 50.8 years, with 65.2% female and 79.1% born in Australia. Conclusion: The results of this recruitment process demonstrate the successful use of multiple strategies to obtain a diverse sample of adults eligible to take part in a web-based physical activity intervention. The use of 1 dual screening processes ensured safe participation in the intervention. This approach to recruitment and physical activity screening can be used as a model for further trials.


Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)




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Peer Reviewed

  • Yes

Open Access

  • Yes

External Author Affiliations

Kansas State University; School of Human, Health and Social Sciences (2013- ); TBA Research Institute; University of Alberta; University of British Columbia; University of Newcastle; University of Western Sydney;

Era Eligible

  • Yes


Contemporary clinical trials communications.