Brueton, VC;
Tierney, J;
Stenning, S;
Harding, S;
Meredith, S;
Nazareth, I;
Rait, G;
(2013)
Strategies to improve retention in randomised trials.
Cochrane Database Syst Rev
, 12
, Article MR000032. 10.1002/14651858.MR000032.pub2.
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Abstract
Loss to follow-up from randomised trials can introduce bias and reduce study power, affecting the generalisability, validity and reliability of results. Many strategies are used to reduce loss to follow-up and improve retention but few have been formally evaluated.
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