Example combination and instructions on how participants were asked to complete the questionnaire (Round 2). This example means that you rate this combination as an 8 on a scale of 0-10, and would strongly consider this screening strategy in a RCT. * - indicates that this combination was suggested by more than one respondent in the first round of questionnaires. Please now rate the following combinations on a scale from 0-10.
Campbell et al. BMC Health Services Research 2012 12:447 doi:10.1186/1472-6963-12-447