Table 5.

Central tendency and spread of ratings for stage 2 (instrument selection), round 2 Delphi items relating to the measuring and reporting of weight loss at follow‐up

Stage 2, Round 2 Questionnaire Item	Definition/Instrument	Mean Panel Rating	SD	Median Panel Rating	IQR
3.1	Mean change in participants' weight in kg	4.66	2.22	5	2 to 7
3.2	Mean % weight change of participants	3.72	1.69	4	3 to 5
3.3	% of participants achieving ≥5% weight loss	3.82	1.5	4	3 to 5
3.4	% of participants achieving ≥10% weight loss	4.93	1.41	5	4 to 6
3.5	all of the above measurements (3.1 + 3.2 + 3.3 + 3.4)	3	2.31	3	1 to 5
3.6	measurements 3.2 + 3.3 (mean % weight change + % achieving ≥5% weight loss)	3.55	2.01	3	2 to 6
3.7	measurements 3.3 + 3.4 (% achieving ≥5% weight loss + % achieving ≥10% weight loss)	4.31	2.19	4	3 to 7

Note. Participants were asked to rank seven definitions for measuring and reporting weight loss at follow‐up in order of their appropriateness for use. Based on mean and median ratings, all 4 potential definitions (items 3.1, 3.2, 3.3, and 3.4) were selected to be carried forward to the final definition/instrument selection Delphi (stage 2, round 3).