Table 1

e-Delphi study results for intervention development reporting items across each e-Delphi round.

ItemsIntervention developersWider stakeholder
Mode score (% agreement by round)
Round 1Round 2Round 3Round 1Round 2Round 3
Report the purpose of the intervention.5 (97)5 (96)5 (100)5 (94)5 (100)5 (100)
Report the target population.5 (97)5 (96)5 (100)5 (100)5 (100)5 (100)
Report any use of components from an existing intervention.5 (84)5 (89)5 (100)4 (89)4 (93)4 (100)
Report how evidence from different sources informed the intervention development.5 (93)5 (96)5 (100)5 (83)5 (86)5 (100)
Report how stakeholders contributed to the intervention development process.5 (97)5 (96)5 (100)4 (89)4 (93)4 (94)
Report important uncertainties at the end of the intervention development process.5 (87)5 (93)5 (100)5 (83)5 (86)5 (78)
Report the context for which the intervention was developed.5 (90)5 (93)5 (96)5 (94)5 (93)5 (100)
Report any changes to interventions required or likely to be required for subgroups.5 (90)5 (89)5 (96)5 (83)4 (93)4 (83)
Report how any published intervention development approach contributed to the development process.5 (83)5 (78)5 (92)4 (67)4 (64)4 (71)
Report how existing published theory informed the intervention development process.5 (87)5 (89)5 (92)4 (89)5 (93)4 (94)
Report any guiding principles, people or factors which were prioritised when making decisions.5 (81)5 (85)5 (92)4 (72)4 (93)4 (83)
Report how the intervention changed in content and format from the start of the intervention development process.*5 (74)4 (74)5 (88)4 (77)4 (93)4 (94)
Report the reasons for discarding intervention components that were considered.*5 (74)5 (81)5 (88)4 (78)4 (93)4 (88)
Follow TIDieR guidance when describing the developed intervention.5 (76)5 (69)5 (80)4 (100)5 (100)5 (88)
Report the intervention development in an open access format (eg, open access journal, report chapter, website).5 (68)4 (67)4 (77)5 (77)5 (86)5 (89)
Report the background and contribution of those making decisions about the intervention content, format and delivery.5 (50)3 (40)3 (42)4 (61)4 (67)4 (67)
Report the time taken to develop the intervention.4 (52)3 (41)3 (27)3 (33)3 (21)3 (17)
Report who, when, why and where the original idea for developing the intervention came from.3 (45)3 (30)3 (27)5 (50)4 (64)4 (67)
  • Items not reaching the threshold for inclusion in round three are shaded.38

  • *These items were merged into one item (see item 10) following the consensus meeting.

  • TIDieR, Template for Intervention Description and Replication.