Flow of data items through Delphi rounds
| Initial dataset | Demographic items | Device characteristic items | Insertion items | Management items | Complication/removal items |
| Round 1 | Considered 5 | Considered 5 | Considered 16 | Considered 9 | Considered 17 |
| Included 4 | Included 4 | Included 15 | Included 9 | Included 17 | |
| Excluded 1 | Excluded 1 | Excluded 1 | Added* 4 | Added* 3 | |
| Added* 1 | Added* 1 | Added* 9 | |||
| Round 2 | Considered 5 | Considered 5 | Considered 23 | Considered 13 | Considered 20 |
| Excluded 1 | Excluded 1 | Excluded 8 | Excluded 4 | Excluded 1 | |
| Added 1 | Added 1 | Added 2 | |||
| Round 3 | Considered 5 | Considered 5 | Considered 17 | Considered 9 | Considered 19 |
| Included 5 | Included 5 | Included 16† | Included 9‡ | Included 15† | |
| Dataset | 5 items | 5 items | 16 items | 9 items | 15 items |
Consensus = ≥70% of survey respondents or panellists.
*Additional variables proposed by participants in Round 1.
†Items merged.
‡Flushing variable relabelled to locking solution only.