“…Reviews evaluating studies comparing ACT to waitlist control, placebo and TAU have reported moderate to large average effect sizes across a broad range of problems such as chronic pain, anxiety disorders, depression, work related stress, substance abuse, posttraumatic stress disorder (A-Tjak et al, 2015;McCracken & Vowles, 2014;Ost, 2008Ost, , 2014. ACT has to some extent been evaluated in relation to SA (Aasdahl et al, 2018;Dahl, Wilson, & Nilsson, 2004;Folke, Parling, & Melin, 2012;Lytsy, Carlsson, & Anderzen, 2017). In the RCT by Dahl and colleagues (2004), a decrease in SA due to pain and stress problems was found in the ACT group compared to the group receiving treatment as usual (TAU).…”