![]() ![]() The size of the consensus sets produced by different criteria was compared, and Youden’s index was used to assess how well the outcomes that met different criteria matched the final core outcomes sets. ![]() Youden’s index was used to assess how well the outcomes ranked highest by each summary statistic matched the final core outcomes sets.Ĭonsensus criteria identified in a review of published Delphi processes were applied to the results of the two child-health Delphi processes. ![]() The correlation coefficient for each comparison was calculated, and Bland-Altman plots produced. Outcomes were ranked by mean, median, or rate of exceedance, and then pairwise comparisons were undertaken to analyse whether the rankings were similar. Results from two unrelated child health Delphi processes were analysed. We aimed to empirically test how the use of different summary statistics and consensus criteria impact Delphi process results. Delphi methodology is increasingly standardised for core outcomes set development, but uncertainties remain. Different consensus methods are used in the development of core outcomes sets the most common is the Delphi process. Core outcomes sets are increasingly used to define research outcomes that are most important for a condition. ![]()
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