Iain K Crombie1, Linda Irvine1, Brian Williams2, Falko F Sniehotta3, Dennis Petrie4, Claire Jones5, John Norrie6, Josie M M Evans7, Carol Emslie8, Peter M Rice9, Peter W Slane10, Gerry Humphris11, Ian W Ricketts12, Ambrose J Melson13, Peter T Donnan1, Simona M Hapca1, Andrew McKenzie1, Marcus Achison1. 1. Division of Population Health Sciences, University of Dundee, Dundee, UK. 2. School of Health and Social Care, Edinburgh Napier University, Edinburgh, UK. 3. Institute of Health and Society, Newcastle University, Newcastle, UK. 4. Centre for Health Economics, Monash Business School, Monash University, Clayton, VIC, Australia. 5. Health Informatics Centre, University of Dundee, Dundee, UK. 6. Edinburgh Clinical Trials Unit (ECTU), University of Edinburgh, Edinburgh, UK. 7. Faculty of Health Sciences and Sport, University of Stirling, Stirling, UK. 8. School of Health and Life Sciences, Glasgow Caledonian University, Glasgow, UK. 9. Division of Neuroscience, University of Dundee,, Dundee, UK. 10. Erskine Practice, Arthurstone Medical Centre, Dundee, UK. 11. Medical and Biological Sciences, School of Medicine, University of St Andrews, St Andrews, UK. 12. School of Computing, University of Dundee, Dundee, UK. 13. Institute of Health and Wellbeing, University of Glasgow, Mental Health and Wellbeing Academic Centre, Gartnavel Royal Hospital, Glasgow, UK.
Abstract
AIMS: To test the effectiveness of a theoretically based text-message intervention to reduce binge drinking among socially disadvantaged men. DESIGN: A multi-centre parallel group, pragmatic, individually randomized controlled trial. SETTING:Community-based study conducted in four regions of Scotland. PARTICIPANTS: A total of 825 men aged 25-44 years recruited from socially disadvantaged areas who had two or more episodes of binge drinking (> 8 UK units on a single occasion) in the preceding 28 days: 411 men were randomized to the intervention and 414 to the control. INTERVENTION AND COMPARATOR: A series of 112 interactive text messages was delivered by mobile phone during a 12-week period. The intervention was structured around the Health Action Process Approach, a comprehensive model which allows integration of a range of evidence-based behaviour change techniques. The control group received 89 texts on general health, with no mention of alcohol or use of behaviour change techniques. MEASUREMENTS: The primary outcome measure was the proportion of men consuming > 8 units on three or more occasions (in the previous 28 days) at 12 months post-intervention. FINDINGS: The proportion of men consuming > 8 units on three or more occasions (in the previous 28 days) was 41.5% in the intervention group and 47.8% in the control group. Formal analysis showed that there was no evidence that the intervention was effective [odds ratio (OR) = 0.79, 95% confidence interval (CI) = 0.57-1.08; absolute reduction 5.7%, 95% CI = -13.3 to 1.9]. The Bayes factor for this outcome was 1.3, confirming that the results were inconclusive. The retention was high and similar in intervention (84.9%) and control (86.5%) groups. Most men in the intervention group engaged with the text messages: almost all (92%) replied to text messages and 67% replied more than 10 times. CONCLUSIONS: A theoretically based text-messaging intervention aimed at reducing binge drinking in disadvantaged men was not found to reduce prevalence of binge drinking at 12-month follow-up.
RCT Entities:
AIMS: To test the effectiveness of a theoretically based text-message intervention to reduce binge drinking among socially disadvantaged men. DESIGN: A multi-centre parallel group, pragmatic, individually randomized controlled trial. SETTING: Community-based study conducted in four regions of Scotland. PARTICIPANTS: A total of 825 men aged 25-44 years recruited from socially disadvantaged areas who had two or more episodes of binge drinking (> 8 UK units on a single occasion) in the preceding 28 days: 411 men were randomized to the intervention and 414 to the control. INTERVENTION AND COMPARATOR: A series of 112 interactive text messages was delivered by mobile phone during a 12-week period. The intervention was structured around the Health Action Process Approach, a comprehensive model which allows integration of a range of evidence-based behaviour change techniques. The control group received 89 texts on general health, with no mention of alcohol or use of behaviour change techniques. MEASUREMENTS: The primary outcome measure was the proportion of men consuming > 8 units on three or more occasions (in the previous 28 days) at 12 months post-intervention. FINDINGS: The proportion of men consuming > 8 units on three or more occasions (in the previous 28 days) was 41.5% in the intervention group and 47.8% in the control group. Formal analysis showed that there was no evidence that the intervention was effective [odds ratio (OR) = 0.79, 95% confidence interval (CI) = 0.57-1.08; absolute reduction 5.7%, 95% CI = -13.3 to 1.9]. The Bayes factor for this outcome was 1.3, confirming that the results were inconclusive. The retention was high and similar in intervention (84.9%) and control (86.5%) groups. Most men in the intervention group engaged with the text messages: almost all (92%) replied to text messages and 67% replied more than 10 times. CONCLUSIONS: A theoretically based text-messaging intervention aimed at reducing binge drinking in disadvantaged men was not found to reduce prevalence of binge drinking at 12-month follow-up.
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