Skip to main content

01.12.2017 | Research | Ausgabe 1/2017 Open Access

Trials 1/2017

Comparative costs and activity from a sample of UK clinical trials units

Trials > Ausgabe 1/2017
Daniel Hind, Barnaby C. Reeves, Sarah Bathers, Christopher Bray, Andrea Corkhill, Christopher Hayward, Lynda Harper, Vicky Napp, John Norrie, Chris Speed, Liz Tremain, Nicola Keat, Mike Bradburn
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1186/​s13063-017-1934-3) contains supplementary material, which is available to authorized users.



The costs of medical research are a concern. Clinical Trials Units (CTUs) need to better understand variations in the costs of their activities.


Representatives of ten CTUs and two grant-awarding bodies pooled their experiences in discussions over 1.5 years. Five of the CTUs provided estimates of, and written justification for, costs associated with CTU activities required to implement an identical protocol. The protocol described a 5.5-year, nonpharmacological randomized controlled trial (RCT) conducted at 20 centres. Direct and indirect costs, the number of full time equivalents (FTEs) and the FTEs attracting overheads were compared and qualitative methods (unstructured interviews and thematic analysis) were used to interpret the results. Four members of the group (funding-body representatives or award panel members) reviewed the justification statements for transparency and information content. Separately, 163 activities common to trials were assigned to roles used by nine CTUs; the consistency of role delineation was assessed by Cohen’s κ.


Median full economic cost of CTU activities was £769,637 (range: £661,112 to £1,383,323). Indirect costs varied considerably, accounting for between 15% and 59% (median 35%) of the full economic cost of the grant. Excluding one CTU, which used external statisticians, the total number of FTEs ranged from 2.0 to 3.0; total FTEs attracting overheads ranged from 0.3 to 2.0. Variation in directly incurred staff costs depended on whether CTUs: supported particular roles from core funding rather than grants; opted not to cost certain activities into the grant; assigned clerical or data management tasks to research or administrative staff; employed extensive on-site monitoring strategies (also the main source of variation in non-staff costs). Funders preferred written justifications of costs that described both FTEs and indicative tasks for funded roles, with itemised non-staff costs. Consistency in role delineation was fair (κ = 0.21–0.40) for statisticians/data managers and poor for other roles (κ < 0.20).


Some variation in costs is due to factors outside the control of CTUs such as access to core funding and levels of indirect costs levied by host institutions. Research is needed on strategies to control costs appropriately, especially the implementation of risk-based monitoring strategies.
Additional file 1: Example protocol for costing exercise. (DOCX 13 kb)
Additional file 2: Generic clinical trial tasks (UKCRC TMN). (DOCX 23 kb)
Additional file 3: Tasks by role – all CTUs. (XLSX 129 kb)
Additional file 4: Justification of costs statements. (DOCX 18 kb)
Additional file 5: Summary of tasks by role by CTU. (XLSX 20 kb)
Über diesen Artikel

Weitere Artikel der Ausgabe 1/2017

Trials 1/2017 Zur Ausgabe