INS and diabetes mellitus: The use of modular worksheets within the STEADY manual (“toolkit”) is shown in Supplemental Table S1a (Appendix, pages 1–2), covering a range of generic CBT tools (e.g., formulation used for each participant), those targeting diabetes-related thoughts and behaviours (e.g., perfectionism), and those targeting specific T1DE behaviours (e.g., binge eating, insulin restriction) Supplemental Table S1b (Appendix, page 3).