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High fidelity? How should we consider variations in the delivery of school-based health promotion interventions?

Cardiff Institute of Society Health and Ethics, Cardiff University, HollidayJ1{at}Cardiff.ac.uk

Suzanne Audrey

Department of Social Medicine, University of Bristol

Laurence Moore

Cardiff Institute of Society Health and Ethics, Cardiff University

Nina Parry-Langdon

Social and Vital Statistics, Office for National Statistics, Newport

Rona Campbell

Department of Social Medicine, University of Bristol

Objective The complexity and scale of health promotion interventions present challenges for the standardization of delivery. Furthermore, health promotion practice favours adapting interventions according to perceived client need. This paper examines the fidelity of intervention delivery within A Stop Smoking in Schools Trial (ASSIST), identifying if and why variations occurred, the consequences of these variations for the integrity of the intervention, and the broader implications for the delivery of evidence-based health promotion in schools.

Design The ASSIST intervention involved influential Year 8 students being trained to encourage their peers, through informal conversations, to be smoke-free. Its effectiveness was evaluated by a pragmatic randomized controlled trial with an integral process evaluation to examine the context, implementation and receipt of the intervention.

Setting Thirty secondary schools in South Wales and the west of England.

Method A variety of methods, including interviews, questionnaires and observation, were used to obtain data from key participants. Qualitative data were analysed using the constant comparative method.

Results Whilst overall fidelity was high, some variations were observed. Despite this variation, the intervention was largely delivered successfully and appropriately across a range of schools. Lessons learned from ASSIST enabled us to develop a model to categorize variations in intervention delivery.

Conclusion The model developed can inform the design of health promotion interventions and identify the level of fidelity which should be expected outside of a trial. We believe that this model can contribute to good practice in the implementation of evidence-based health promotion in schools.

Key Words: adolescent health • fidelity • health promotion • schools • smoking

Health Education Journal, Vol. 68, No. 1, 44-62 (2009)
DOI: 10.1177/0017896908100448


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