... al., 2017;Bansa et al., 2018;Baumeister et al., 2015;Brabyn et al., 2016;Bunnell et al., 2017;Garnefski et al., 2011;Garrido et al., 2013;Høifødt et al., 2013;Law et al., 2017;Li et al., 2011;Lillevoll et al., 2014;Lungu & Sun, 2016;Reid et al., 2011;Ruggiero et al., 2015;Schueller et al., 2019;Staples et al., 2019 Qualitative or mixed methods 7 28Agyapong et al., 2016;Lucassen et al., 2015;Neal-Barnett et al., 2019;Price et al., 2015;Shepherd et al., 2018;Spates et al., 2013; Stjerneklar et al.Bansa et al., 2018;Lillevoll et al., 2014; al., 2019; Stjerneklar et al., 2018; Thew et al., 2019 Cost-effectiveness 1 Ã Brabyn et al., 2016 Consumers' perspective or acceptance 10 Ã Agyapong et al., 2016; Baumeister et al., 2015; Bunnell et al., 2017; Høifødt et al., 2013; Lucassen et al., 2015; Lungu & Sun, 2016; Price et al., 2015; Schueller et al., 2019; Shepherd et al., 2018; Thew et al., 2019 Clinical effectiveness 17 Ã Agyapong et al., 2016, 2017; Brabyn et al., 2016; Garnefski et al., 2011; Garrido et al., 2013; G omez et al., 2019; Høifødt et al., 2013; Law et al., 2017; Li et al., 2011; Lillevoll et al., 2014; Neal-Barnett et al., 2019; Reid et al., 2011; Ruggiero et al., 2015; Schueller et al., 2019; Spates et al., 2013; Staples et al., 2019; Thew et al., 2019 Personalization in DPI DPI was personalized 11 44 Bansa et al., 2018; G omez et al., 2019; Høifødt et al., 2013; Law et al., 2017; Li et al., 2011; Lucassen et al., 2015; Neal-Barnett et al., 2019; Price et al., 2015; Ruggiero et al., 2015; Shepherd et al., 2018; Stjerneklar et al., 2018 DPI was not personalized 5 20Agyapong et al., 2016;Brabyn et al., 2016;Lillevoll et al., 2014;Schueller et al., 2019; Thew et al.et al., 2017;Baumeister et al., 2015;Bunnell et al., 2017;Garnefski et al., 2011;Garrido et al., 2013;Lungu & Sun, 2016;Reid et al., 2011;Spates et al., 2013;Staples et al., 2019 Delivery methods of DPIs Online 13 ÃBansa et al., 2018;Baumeister et al., 2015;Brabyn et al., 2016;Bunnell et al., 2017;Høifødt et al., 2013;Law et al., 2017;Lillevoll et al., 2014;Lungu & Sun, 2016;Price et al., 2015;Ruggiero et al., 2015;Staples et al., 2019;Stjerneklar et al., 2018;Thew et al., 2019 Mobile 6 Ã Agyapong et al., 2016, 2017Brabyn et al., 2016;Neal-Barnett et al., 2019;Reid et al., 2011; al., 2019 Desktop 4 Ã Garnefski et al., 2011; Garrido et al., 2013; Shepherd et al., 2018; Spates et al., 2013 Games 3 Ã G omez et al., 2019; Lucassen et al., 2015; Shepherd et al., 2018 Virtual reality 2 Ã G omez et al., 2019; Li et al., 2011 Ã The percentages are not calculated because of multiple instances of overlapped items in one study (e.g., cost-effectiveness and clinical effectiveness in one study, or mobile and desktop delivery methods in one study). ...