Table 3. Adaptation procedure based on TIDieR checklist.

No.	Item	Details
1	Brief name	POSE-D: Providing online guided self-help (GSH) for the management of eating disorders in adults with type 2 diabetes (T2D): pilot study
2	Why	To test whether guided self-help (GSH) for binge eating (BE) is feasible to deliver and acceptable for individuals living or working with adults with T2D
3/4	What materials, procedures	Working to Overcome Eating Difficulties: An online workbook-based platform comprising seven sections based on Cognitive Behavioural principles and Transtheoretical model of eating disorders 7 × 1 h guidance sessions with a trained Guide Half-day Guide training and ongoing supervision
5	Who provided	Online platform developed and hosted by Making Your Mind Up (MYMUP) https://mymupdigital.co.uk/ Guidance provided by a trained Guide—a healthcare professional (HCP) with any professional therapeutic background who works with adults living with T2D Guide Training and supervision delivered by authors S.H.-E., A.H. and G.T.-T.
6/7	How, where?	All completed and supported remotely
8	When and how much	7 × 1 h guidance sessions delivered by trained Guide over 12 weeks Guide Training half-day June 2022 Supervision monthly
9	Tailoring	Intervention content and platform are appropriate to individuals living with T2D. However, the main tailoring comes in the form of the Guide training and guidance. The Guide is trained to tailor the intervention to individual needs
10	Modifications	Online platform: food diary changed to an eating diary, which can be accessed on the platform or downloaded. The central vignette character Sam was adapted to live with T2D. Videos of Sam have been removed and references to age have been adapted or removed to make Sam older Guidance sessions: condensed to half day, remote training. Adapted to include T2D-specific training and motivational interview training skills
11	How well planned	Adaptation was planned in accordance with ADAPT guidance
12	How well enacted	Data were analysed using thematic analysis and key themes documented. An independent Expert Consensus Group was consulted on any areas of contention between expert patients and HCPs