Table 5.

Benefits and drawbacks of blended group therapy (bGT) according to interview follow-up survey (n=8).

Statementa	Percentages		Mean (SD)
	Agree (rather agree)	Disagree (rather disagree)
I am more open after experience with bGTa	25 (75)	0 (0)	3.25 (0.46)
I am more critical after experience with bGTa	0 (0)	13 (88)	1.86 (0.36)
I have serious concerns about data safetya	0 (25)	25 (50)	2.00 (0.76)
bGT may also be feasible for in-patient treatmenta	13 (75)	0 (13)	3 (0.53)
Advantages of more flexible working hours because of Web-based guidancea	50 (38)	13 (0)	3.25 (1.03)
Computer elementsb should be used for in-session supporta	50 (25)	0 (25)	3.25 (0.89)
Overuse of in-session media can hamper group dynamicsa	50 (38)	0 (13)	3.38 (0.75)
Overuse of in-session media did hamper dynamics in my groupsa	0 (25)	50 (25)	1.75 (0.87)
Computer elementsc should be used for between-session supporta	63 (38)	0 (0)	3.63 (0.52)
Platform prepares patients optimally for group reunionsa	38 (63)	0 (0)	3.38 (0.52)
Repeated application of therapy content fosters abilities (CE, app, and session)a	38 (63)	0 (0)	3.38 (0.52)
Reminders increased compliance with Web-based tasksa	13 (75)	0 (13)	3.00 (0.53)
bGT cannot increase treatment transfera	0 (13)	38 (50)	1.75 (0.71)
Reminders did exert a lot of pressure on some patientsa	13 (50)	0 (38)	2.75 (0.71)
Additional between-session therapist time needs to be reimburseda	88 (13)	0 (0)	3.88 (0.35)
Patients shared additional private concerns over platform (online disinhibition)a,d	50 (34)	0 (17)	3.33 (0.82)
Between-session contact made me feel more connected with clientsa,d	17 (83)	0 (0)	3.17 (0.41)
Between-session contact does not promote relationship with clienta,d	0 (0)	33 (67)	1.67 (0.52)

^aExact wording is provided in Multimedia Appendix 2.

^bSlides and videos.

^cPlatform, app, and monitoring.

^dOptional questions only applied to 6 therapists.