Table 1.

Sample quotations illustrating feedback categories and themes.

Categories	Themes	Description	Sample quotation
Acceptability	Suitability for the target population	The assessors believed the module is suitable for the target population. They appreciated the video examples provided by patient representatives, which were described as something patients would be able to relate to.	“The videos of the patient representatives are wonderful and illustrate the subject beautifully.”
	Confidentiality	Some assessors stressed the importance of explicitly addressing any confidentiality concerns patients may have, both at the start of the module and when exercises ask for the disclosure of personal experiences and thoughts.	“It might be good to also describe confidentiality/privacy in assignments where clients have to be vulnerable? (I) can imagine that there are distrustful clients who find it difficult to fill in their experiences on a website? Maybe suggest an alternative, for example: you can also write this down for yourself in a notebook.”
	Benefits	Assessors believed the module would most likely be beneficial to patients. Potential benefits they mentioned include an increased understanding of moral injury and better insight into how therapy and certain exercises can be helpful.	“(The module) would give me a lot of clarity and reassurance. To understand what it does to you, that it is not crazy what you are struggling with. It makes it easier to discuss things, also with your partner (…). This can lead to more understanding. I found these things difficult to explain myself, so this module is very clear and helpful.”
Feasibility	Clinical context	Many assessors stressed the importance of offering the module as blended treatment. They emphasized it would be best to conduct the module alongside in-person therapy, to maximize the potential of the module. Embedding the module within a clinical context was also perceived as helpful in case module topics were triggering.	“With the guidance of the practitioner, it is feasible. It could trigger a lot. There should be an option to contact your practitioner. Especially if your appointment is next week. Simply knowing that is possible is reassuring.”
Engagement	Clarity of information	Module information provided was generally evaluated as clear and complete. Particularly the videos of various experts and patient representatives were found to be illuminating and engaging. Some assessors offered suggestions for improving information.	“Good to see the concept of moral injury explained from different perspectives. Good differentiation between PTSD and moral injury, with the explanation of the patient representative. I think clients would be able to benefit a lot from that.”
	Overview of the module	Most assessors found the module clear and orderly structured, with a logical progression from one topic to the next. Some suggested the module would be easier to navigate if it had a more user-friendly menu to browse between chapters.	“It might be useful to have a navigation menu where you can browse back to all the different chapters. So if the patient wants to revisit the mindfulness chapter, this can be done with a single click in the navigation menu.”
	Suggestions for improvement	Assessors offered various practical suggestions for improving the module, including adding certain exercises and examples of how to work on recovery.	“Maybe explicitly state that (…), not only forgiveness and acceptance help, but also actively doing meaningful things? Achieving forgiveness not only through internal, mental processes, but also by actively doing things.”
Unintended consequences	Potentially triggering elements	Assessors believed risks associated with the module to be low. However, some potentially triggering elements were mentioned, including an exposure exercise and stories of moral injury shared by the patient representatives.	“I can imagine that this is a tough chapter for people who (still) have a lot of PTSD symptoms. Such as the question to write down memories. Though I expect that this would be considered at intake.”