Table 3.

Domains.

Domains	Description
The user experience	This section reports on initial attraction and user satisfaction with the programme. It identifies whether users found it informative and helpful. Investigated what users liked most and least, and their overall experience. Users also compared CCBT to previous treatments.
Platform functionality	This section reports on how easy the users found the programme to use and how happy users were to access their treatment online.
Online support	This section reports on how supported the users felt, their perceptions of having an online supporter and experience of sharing information with them.
Content modules	This section reports individual module ratings, the content and aspects liked best and least and improvement suggestions made by users. An outline of the individual modules' content is provided in the method's section.
Intervention impact	This section reports the potential short-term and long-term effects of the programme as discussed by users.