• Depression and anxiety · Oct 2018

    Randomized Controlled Trial Multicenter Study

    Moderating effect of comorbid anxiety disorders on treatment outcome in a randomized controlled psychotherapy trial in early-onset persistently depressed outpatients.

    • Nele Assmann, Elisabeth Schramm, Levente Kriston, Martin Hautzinger, Martin Härter, Ulrich Schweiger, and Jan Philipp Klein.
    • Department of Psychiatry and Psychotherapy, Lübeck University, Lübeck, Germany.
    • Depress Anxiety. 2018 Oct 1; 35 (10): 1001-1008.

    BackgroundPersistent depressive disorder (PDD) is associated with high rates of comorbid psychiatric disorders, mostly anxiety disorders (ADs). Comorbid AD was found to be associated with poorer treatment outcome in PDD patients. The effect of comorbid AD on disorder-specific treatment for PDD (Cognitive Behavioral Analysis System of Psychotherapy [CBASP]) has not been studied yet.MethodsWe analyzed whether the presence of a comorbid AD was moderating the effectiveness of disorder-specific (CBASP) versus nonspecific psychotherapy (supportive therapy [SP]) on depressive symptoms (24-item Hamilton Rating Scale for Depression [HRSD-24]) in a sample of unmedicated early-onset PDD outpatients (N = 268). Secondary outcomes were response and remission of depressive symptoms and the extent of interpersonal problems (Inventory of Interpersonal Problems [IIP-64]).ResultsThe superiority of CBASP over SP was significantly stronger in PDD patients with comorbid AD compared to patients without AD (in HRSD-24 and IIP-64). There was no significant moderation for remission or response of depressive symptoms.DiscussionOur hypothesis of a moderating effect of comorbid AD was confirmed. The main limitation might be the exclusion criteria of our sample limiting the generalizability. The major strength is the systematic analysis of the effect of AD in treating early-onset PDD with high quality of psychotherapy in both arms of this trial.ConclusionPatients suffering from PDD comorbid with AD might experience greater benefit when they are treated with specific as opposed to unspecific therapy. Analyzing subgroups of patients with PDD seems worthwhile to improve treatment effectiveness even within disorder-specific treatment programms.© 2018 Wiley Periodicals, Inc.

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