Methodology Review

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Strategies to improve retention in randomised trials

  1. Valerie C Brueton1,*,
  2. Jayne Tierney2,
  3. Sally Stenning3,
  4. Seeromanie Harding4,
  5. Sarah Meredith3,
  6. Irwin Nazareth5,
  7. Greta Rait5

Editorial Group: Cochrane Methodology Review Group

Published Online: 3 DEC 2013

Assessed as up-to-date: 13 JUN 2013

DOI: 10.1002/14651858.MR000032.pub2


How to Cite

Brueton VC, Tierney J, Stenning S, Harding S, Meredith S, Nazareth I, Rait G. Strategies to improve retention in randomised trials. Cochrane Database of Systematic Reviews 2013, Issue 12. Art. No.: MR000032. DOI: 10.1002/14651858.MR000032.pub2.

Author Information

  1. 1

    MRC Clinical Trials Unit, Meta-analysis Group, London, UK

  2. 2

    MRC Clinical Trials Unit at UCL, Meta-analysis Group, London, UK

  3. 3

    MRC Clinical Trials Unit, London, UK

  4. 4

    Medical Research Council, Social and Public Health Sciences Unit, Glasgow, UK

  5. 5

    University College London, Research Department of Primary Care and Population Health, London, UK

*Valerie C Brueton, Meta-analysis Group, MRC Clinical Trials Unit, 125 Kingsway, London, WC2B 6NH, UK. vcb@ctu.mrc.ac.uk.

Publication History

  1. Publication Status: New
  2. Published Online: 3 DEC 2013

SEARCH

[Figure 1]
Figure 1. Attrition study flow diagram.
[Analysis 1.1]
Analysis 1.1. Comparison 1 Addition of incentive vs none: main analysis, Outcome 1 Retention.
[Analysis 2.1]
Analysis 2.1. Comparison 2 Addition of incentive: sensitivity analysis: quasi-randomised trials removed, Outcome 1 Retention.
[Analysis 3.1]
Analysis 3.1. Comparison 3 Addition of incentive: separating research arms of non-factorial trials (three-/four-arm trials), Outcome 1 Retention.
[Analysis 4.1]
Analysis 4.1. Comparison 4 Addition of telephone follow-up vs incentive, Outcome 1 Retention.
[Analysis 5.1]
Analysis 5.1. Comparison 5 Addition of monetary incentive to both study arms, Outcome 1 Retention.
[Analysis 6.1]
Analysis 6.1. Comparison 6 Addition of monetary incentive vs offer of incentive, Outcome 1 Retention.
[Analysis 7.1]
Analysis 7.1. Comparison 7 Enhanced letter versus standard letter: main analysis, Outcome 1 Retention.
[Analysis 8.1]
Analysis 8.1. Comparison 8 Communication strategies letter: total design method, Outcome 1 Retention.
[Analysis 9.1]
Analysis 9.1. Comparison 9 Communication strategies post: main analysis, Outcome 1 Retention.
[Analysis 10.1]
Analysis 10.1. Comparison 10 Communication strategies: additional reminder vs usual follow-up: main analysis, Outcome 1 Retention.
[Analysis 11.1]
Analysis 11.1. Comparison 11 Communication strategies additional reminder to trial site vs usual reminder (ICC 0.054), Outcome 1 Retention.
[Analysis 12.1]
Analysis 12.1. Comparison 12 Communication strategies: questionnaire administered early vs late, Outcome 1 Retention.
[Analysis 13.1]
Analysis 13.1. Comparison 13 Communication strategies: type of reminder: main analysis, Outcome 1 Retention.
[Analysis 14.1]
Analysis 14.1. Comparison 14 Questionnaire strategies: new vs standard questionnaire: main analysis, Outcome 1 Retention.
[Analysis 15.1]
Analysis 15.1. Comparison 15 Questionnaire strategies: new vs standard questionnaire: sensitivity analysis quasi-randomised trial McColl, Outcome 1 Retention.
[Analysis 16.1]
Analysis 16.1. Comparison 16 Behavioural strategies: main analysis, Outcome 1 Retention.
[Analysis 17.1]
Analysis 17.1. Comparison 17 Case management, Outcome 1 Retention.
[Analysis 18.1]
Analysis 18.1. Comparison 18 Methodology strategies, Outcome 1 Retention.