The financial impact of participant attrition from randomised trials: a case-study from the Occupational Therapist Intervention Study (OTIS).

There may be significant administration costs, as well as print and shipping costs of trial materials related to the recruitment and the follow‐up of randomised participants lost to follow‐up, acting as resource misallocation to the trial commissioner's budget of £722,096.59 (NIHR Health Technology Assessment Programme 14/49/149). 7 A CONSORT diagram showing the recruitment and retention of participants in the OTIS trial is available in Supporting Information 1 . 1.3.

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