Characteristics of the first Delphi questionnaire.
Datasets usually provide raw data for analysis. This raw data often comes in spreadsheet form, but can be any collection of data, on which analysis can be performed.
Percentage of studies that reported this item over the total number of studies (n = 80).b
All percentages were calculated relative to the total number reported.c
The total percentage may exceed 100% because some studies used more than one criterion.d
included Previous work , Internal consensus , Results of first Delphi round, Development of new QI.