Open Access Open Badges Study protocol

The DYD-RCT protocol: an on-line randomised controlled trial of an interactive computer-based intervention compared with a standard information website to reduce alcohol consumption among hazardous drinkers

Elizabeth Murray1*, Jim McCambridge2, Zarnie Khadjesari1, Ian R White3, Simon G Thompson3, Christine Godfrey4, Stuart Linke1 and Paul Wallace1

Author Affiliations

1 E-health Unit, Department of Primary Care and Population Sciences, University College London, Highgate Hill, London N19 5LW, UK

2 Centre for Research on Drugs & Health Behaviour, London School of Hygiene & Tropical Medicine, Keppel Street, London WC1E 7HT, UK

3 MRC Biostatistics Unit, Institute of Public Health, Forvie Site, Robinson Way, Cambridge CB2 0SR, UK

4 Department of Health Sciences, Seebohm Rowntree Building, University of York, Heslington, York YO10 5DD, UK

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BMC Public Health 2007, 7:306  doi:10.1186/1471-2458-7-306

Published: 26 October 2007



Excessive alcohol consumption is a significant public health problem throughout the world. Although there are a range of effective interventions to help heavy drinkers reduce their alcohol consumption, these have little proven population-level impact. Researchers internationally are looking at the potential of Internet interventions in this area.


In a two-arm randomised controlled trial, an on-line psychologically enhanced interactive computer-based intervention is compared with a flat, text-based information web-site. Recruitment, consent, randomisation and data collection are all on-line. The primary outcome is total past-week alcohol consumption; secondary outcomes include hazardous or harmful drinking, dependence, harm caused by alcohol, and mental health. A health economic analysis is included.


This trial will provide information on the effectiveness and cost-effectiveness of an on-line intervention to help heavy drinkers drink less.

Trial registration

International Standard Randomised Controlled Trial Number Register ISRCTN31070347