Symptoms of emotional disorders and sociodemographic factors as moderators of dropout in psychological treatment: A meta-review

Objective: Dropout from psychological treatment is an important problem that substantially limits treatment effec-tiveness. A better understanding of this phenomenon, could help to minimize it. Therefore, we performed a sys-tematic review of meta-analyses (MA) on dropout from psychological treatments to (1) determine the estimated overall dropout rate (DR) and (2) to examine potential predictors of dropout, including clinical symptoms (anxi-ety and depression) and sociodemographic factors.Method: A literature search of the PubMed PsycINFO, Embase, Scopus and Google Scholar databases was con-ducted. We identified 196 MAs on dropout from psychological treatment carried out primarily in adult patients or mixed samples (adults and children) between 1990 and 2022. Of these, 12 met all inclusion criteria. Two forest plots were created to visualize the DR and the relationship between DR and the disorder.Results: The DR ranged from 15.9% to 46.8% and was significantly moderated by symptoms of emotional disorders. The highest DR were observed in younger, unmarried patients, and those with lower educational and income levels.Conclusions: DR in patients undergoing psychological treatment is highly heterogeneous, but higher in individuals presenting symptoms of anxiety and/or depression, especially the latter. Given that high DR undermine the effec-tiveness of psychological interventions, it is clear that greater efforts are needed to reduce dropout, particularly among individuals with symptoms of emotional disorders.