This study investigated the efficacy of a multicomponent cognitive–behavioral intervention of insomnia, CBT-I, for patients suffering from an anxiety disorder and/or a major depressive episode together with comorbid insomnia. In... more
This study investigated the efficacy of a multicomponent cognitive–behavioral intervention of insomnia, CBT-I, for patients suffering from an anxiety disorder and/or a major depressive episode together with comorbid insomnia. In particular, the aim of the study was to evaluate whether anxiety and depressive symptoms declined as a function of treatment for insomnia. After rigorous diagnostic procedures, 8 patients were treated in a multiple baseline design. Patients experienced clinically significant reductions in insomnia-, (57 %) depressive- (75 %) and anxiety symptoms (40 %). A three week follow-up measurement demonstrated retained effects. These findings suggest that CBT-I is a feasible treatment for comorbid insomnia. It also provides partial support for insomnia as a possible causal agent of depression and anxiety. Further, a schematic model of transdiagnostic processes common to insomnia, anxiety and depression, is presented. More research is warranted to render better treatme...
