Getting messier with TIDieR: embracing context and complexity in intervention reporting.

We found TIDieR to be a useful tool for applied research outside the context of clinical trials and we suggest four revisions or additions to the original TIDieR which would enable it to better capture these complexities in applied health research: An additional item, 'voice' conveys who was involved in preparing the TIDieR template, such as researchers, service users or service deliverers. An additional item, 'stage of implementation' conveys what stage the intervention has reached, using a continuum of implementation research suggested by the World Health Organisation. A new column, 'modification' reminds authors to describe modifications to any item in the checklist. An extension of the 'how well' item encourages researchers to describe how contextual factors affected intervention delivery.