Consensus definitions
| Decision | Definition | Explanation |
| Delphi round 1/2 | ||
| Consensus in | ≥70% of the participants rated the item as critically important for the core data set (scores 7–9) | Item will be included into the final core data set |
| Consensus out | ≥70% of the participants rated the item as not important for the core data set (scores 1–3) | Item will be excluded from the final core data set |
| Equivocal | All items that are neither in the consensus-in nor in the consensus-out group | No consensus was reached for the respective item. Final decision at the consensus meeting |
| Face-to-face consensus meeting | ||
| Consensus in | Simple majority (>50% of votes) | Item will be included into the final core data set |
| Consensus out | Simple majority (>50% of votes) | Item will be excluded from the final core data set |