Table 1 Criteria for classifying questionnaire statements

Endorsed

At least 80% of both professionals AND people with lived experience rate the item “essential” or “important”

AND

At least 80% of both professionals AND people with lived experience rate the item as “very helpful” or “somewhat helpful” (or in the case of items we wished to highlight as harmful in the guidelines, “very harmful” or “unhelpful”.)

Re-rate

70–79% of both professionals AND people with lived experience rate the item “essential” or “important”; OR >80% of either professionals OR people with lived experience rate the item “essential” or “important”

AND

70–79% of both professionals AND people with lived experience rate the item “very helpful” or “somewhat helpful” (or in the case of items we wished to highlight as harmful in the guidelines, “very harmful” or “somewhat harmful”); OR >80% of either professionals OR people with lived experience rate the item “very helpful” or “somewhat helpful” (or in the case of items we wished to highlight as harmful in the guidelines, “very harmful” or “somewhat harmful”).

Not endorsed

<70% of both professionals AND people with lived experience rate the item “essential” or “important”

AND/OR

<70% of both professionals AND people with lived experience rate the item “very helpful” or “somewhat helpful” (or in the case of items we wished to highlight as harmful in the guidelines, “very harmful” or “somewhat harmful”).