Tailored internet-based psychological treatment for psychological problems during the COVID-19 pandemic: A randomized controlled trial.

"Declaration of competing interest The authors report there are no competing interests to declare."

"This study was supported by a professors grant from 10.13039/501100003945Linköping University to professor Andersson. We thank George Vlaescu for managing the treatment portal. We also thank Emma Byggeth and Julia Engström for being therapists in the study."

"Included participants were randomized on a 1:1 ratio to either a treatment group or a control group by a person not involved in the research. In the treatment group participants received guided ICBT for eight weeks with therapist support once a week through a secure platform (). The control group participants were assigned to a waitlist. Pre-treatment and post-treatment measures, consisting of primary and secondary measures described below, were administered before and after the eight-week treatment period. The control group received treatment after post-treatment measures had been collected and post-treatment interviews finished. The study was a continuation of our pilot study () with some minor changes. The study protocol was approved by The Swedish National Ethics Committee (Dnr 2020–02313) and is registered on ClinicalTrials.org (NCT04424212). A one-year follow-up measurement was also included."