“…Several studies have identified various patient variables, such as sociodemographic, comorbidity, baseline symptom severity, adherence, and personality, as predictors of treatment outcome [ 18 – 20 ]. For example, previous studies suggested that high pre-treatment symptom severity [ 14 , 17 ] and comorbidity [ 14 ] are associated with poorer response, while other studies showed that having more symptoms, higher education, and being female were predictors of treatment improvement [ 21 , 22 ]. However, most studies focus on the responders rather than explicitly examining the nonresponders.…”