Based on the known breadth of synonymous terms for PPI and trial oversight committees, a wide-ranging search strategy of Embase, MEDLINE and PsychINFO was employed to identify suitable literature for review. The search strategy employed is listed in Table Table1.1. Inclusion criteria were references to:

training or induction materials

at least one type trial oversight committee (TMG, TSC or IDMC)

PPI Contributors

Published data search strategy

PPI leads at CTUs were approached to share local induction materials via the UK Clinical Research Collaboration’s Registered Clinical Trial Units Network (UKCRC CTU). This network of CTUs was selected as these organisations are recognised as experienced centres in clinical trial delivery and design [16]. The network hosts a dedicated PPI sub-group with the specific aim of mapping existing resources and developing collaborative working [17].

Two requests, in April and May 2018, to share information were sent to research-focused charities via the Charities Research Involvement Group – an organisation dedicated to supporting PPI in health research [18]. It was hypothesised that the collaborative aim of this group would result in a greater number of resources being shared than if individual organisations were to be indiscriminately contacted directly. Approaching a collective also allowed for a wide range of organisations to be contacted in an efficient manner.

Abstracts of articles returned through the database searches were reviewed to assess suitability for inclusion in the results by EP. Those deemed to meet at least two of the inclusion criteria stated above were reviewed in full. Reference lists of the most relevant articles were checked to identify any additional relevant materials using the same approach of abstract review.

CTUs that responded to the request for information sent by the UKCRC and charities involved in the Charities Research Involvement Group (comprising a membership of 12 CTUs [19]) were invited to discuss their materials and methods by phone or email or to provide electronic copies of their resources directly. Any materials referenced in the documents that were not captured in the literature search were reviewed in light of the inclusion criteria above.

Note: The content above has been extracted from a research article, so it may not display correctly.



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