“…Despite this and the fact that the whole study sample size ( N = 223) was larger than that used by prior adult research to examine differences in clinical variables between the four DSM‐5 severity groups (e.g., Dakanalis, Colmegna et al, 2017; Dakanalis, Riva et al, 2017), replication of the findings with larger adolescent clinical samples with BED and other methods of data collection (e.g., ecological momentary assessment) and extension to different samples (i.e., community‐recruited young people with BED), would be beneficial. In addition to comparing the DSM‐5 severity approach with alternative ones (i.e., subtyping based on overvaluation of shape/weight or along dietary and negative/depressive affect dimensions; Masheb & Grilo, 2008; Stice et al, 2001), future studies should also track severity fluctuation across time and test whether the DSM‐5 severity groups of BED (APA, 2013) differ in additional clinical correlates and socio‐demographic variables (not considered here) such as parental educational, socio‐economic status and family structure/context and functioning, child abuse, psychiatric history, externalizing psychopathology, reward from high‐calorie food intake and behavioural impulse control (e.g., Caslini et al, 2016; Hamilton et al, 2015; Tsappis et al, 2016). It is also essential that future BED research examines the DSM‐5 (mild, moderate, severe, and extreme) severity groups of BED (APA, 2013) in terms of their prognostic significance for treatment outcome, as this will provide evidence for the predictive validity of the DSM‐5 (not evaluated in this study).…”