Open Access Update

Update on the collaborative interventions for circulation and depression (COINCIDE) trial: changes to planned methodology of a cluster randomized controlled trial of collaborative care for depression in people with diabetes and/or coronary heart disease

Peter A Coventry1*, Karina Lovell2, Chris Dickens3, Peter Bower1, Carolyn Chew-Graham1, Andrea Cherrington1, Charlotte Garrett1, Chris J Gibbons1, Clare Baguley4, Kate Roughley1, Isabel Adeyemi1, Chris Keyworth1, Waquas Waheed5, Mark Hann1, Linda Davies1, Farheen Jeeva1, Chris Roberts1, Sarah Knowles1 and Linda Gask1

Author Affiliations

1 Greater Manchester Collaboration for Leadership in Applied Health Research and Care, Institute of Population Health and Manchester Academic Health Science Centre, University of Manchester, Manchester M13 9PL, UK

2 School of Nursing, Midwifery & Social Work and Manchester Academic Health Science Centre, University of Manchester, Manchester M13 9PL, UK

3 Peninsula College of Medicine and Dentistry, University of Exeter and Peninsula Collaboration for Leadership in Applied Health Research and Care (PenCLAHRC), Exeter, Devon EX1 2LU, UK

4 IAPT North West Programme Field Lead, NHS North West, Manchester M60 7LP, UK

5 Lancashire Care NHS Foundation Trust, Preston PR5 6AW, UK

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Trials 2013, 14:136  doi:10.1186/1745-6215-14-136

Published: 11 May 2013

Abstract

Background

The COINCIDE trial aims to evaluate the effectiveness and cost-effectiveness of a collaborative care intervention for depression in people with diabetes and/or coronary heart disease attending English general practices.

Design

This update details changes to the cluster and patient recruitment strategy for the COINCIDE study. The original protocol was published in Trials (http://www.trialsjournal.com/content/pdf/1745-6215-13-139.pdf webcite). Modifications were made to the recruitment targets in response to lower-than-expected patient recruitment at the first ten general practices recruited into the study. In order to boost patient numbers and retain statistical power, the number of general practices recruited was increased from 30 to 36. Follow-up period was shortened from 6 months to 4 months to ensure that patients recruited to the trial could be followed up by the end of the study.

Results

Patient recruitment began on the 01/05/2012 and is planned to be completed by the 30/04/2013. Recruitment for general practices was completed on 31/10/2012, by which time the target of 36 practices had been recruited. The main trial results will be published in a peer-reviewed journal.

Conclusion

The data from the trial will provide evidence on the effectiveness and cost-effectiveness of collaborative care for depression in people with diabetes and/or coronary heart disease.

Trial registration

Trial registration number: ISRCTN80309252

Keywords:
Depression; Diabetes; Coronary heart disease; Primary care; Collaborative care