CONSORT-EHEALTH Checklist V1.6.2 Report

Internet-delivered Interpersonal Therapy versus internet-delivered Cognitive Behaviour Therapy for adults with depressive symptoms: A Randomized Controlled Noninferiority Trial TITLE 1a-i) Identify the mode of delivery in the title we have used: "Internet-delivered". 1a-ii) Non-web-based components or important co-interventions in title The interventions are completely online, there are no offline components. 1a-iii) Primary condition or target group in the title "adults with depressive symptoms" ABSTRACT 1b-i) Key features/functionalities/components of the intervention and comparator in the METHODS section of the ABSTRACT "An automated, three-arm, fully self-guided online noninferiority trial compared two new treatments (IPT [n=620] and CBT [n=610]) to an active control treatment (MoodGYM, n=613) over a four week period in the general population." 1b-ii) Level of human involvement in the METHODS section of the ABSTRACT There was no human contact whatsoever. "An automated, three-arm, fully self-guided online noninferiority trial compared two new treatments (IPT [n=620] and CBT [n=610]) to an active control treatment (MoodGYM, n=613) over a four week period in the general population. Outcomes were assessed using online self-report questionnaires (CES-D and CSQ-8) completed immediately following treatment and at 6-month follow-up." 1b-iii) Open vs. closed, web-based (self-assessment) vs. face-to-face assessments in the METHODS section of the ABSTRACT participants were recruited online, this is a purely web-based trial, outcomes were self-assessed through questionnaires (online).