“…Reasons for exclusion were: (a) not peer reviewed (5 studies); (b) not in English (2 studies); (c) study analysis did not include clustering methods (38 studies); (d) variables other than illness representation subscales were used to create groups (27 studies); (e) illness representation was not measured using the subscales of the IPQ‐R (change scores 6 studies, Brief IPQ 5 studies, other measures 6 studies, 17 studies total); (f) sample population did not have a chronic disease (2 studies); and (g) outcome variables were not health‐related. A total of 12 studies met inclusion criteria (Aujla, Walker, Sprigg, & Vedhara, 2018; Berry, Davies, & Dempster, 2017; Flora, Anderson, & Brawley, 2015; Graham, Rose, Hankins, Chalder, & Weinman, 2013; Harrison et al, 2014; Hobro, Weinman, & Hankins, 2004; Hsiao, Chang, & Chen, 2012; Lin & Heidrich, 2012; Lopes et al, 2018; McCorry et al, 2013; Norton et al, 2014; Turkington, Dempster, & Maguire, 2018).…”