Methods. This study will examine late phase trials, published between January and March 2020 (inclusive), in the following five medical journals: New England Journal of Medicine, Journal of the American Medical Association, Lancet, BMJ, and Annals of Internal Medicine. Trials will be examined to determine if they refer to a COS, and whether they use a COS. Trialists for each identified trial will subsequently be contacted to complete an online survey examining trialists’ awareness of, and decisions to search for and use a COS.
Discussion. This study will provide important information on uptake of COS by later phase trialists in major medical journals, and the views of these trialists on COS use in trials. These findings will inform approaches to increasing awareness and uptake of COS in future health trials.