1. List of studies by number of active and comparative arms.

Design	Number of studies	Studies
2‐arm trial of intervention vs control	16	Abrahams 2010; Anderson 2010; Bass 2016; Bell 2019; Bomyea 2015; Bowland 2012; Brady 2021; Creech 2021; Falsetti 2008; Gray 2020; Krakow 2001; Littleton 2016; Miller 2015; Rajan 2020; Rothbaum 1997; Sikkema 2018
2‐ or 3‐active arm trial vs control group	7	Foa 1991; Foa 1999; Foa 2005; Foa 2006; Resick 2002; Rothbaum 2005; Walsh 2017
2‐ or 3‐active arm trial	13	Acierno 2021; Bass 2013; Belleville 2018; Covers 2021; Echeburua 1996; Feske 2008; Galovski 2016; Katz 2014; Kelly 2021; Nixon 2016; Resick 2008a; Schnurr 2007; Surís 2013