Treating depression and its comorbidity : From individualized Internet-delivered cognitive behavior therapy to affect-focused psychodynamic psychotherapy

The overarching goal of this thesis has been to enhance Internet-delivered psychological treatments for depression and its comorbidity. To this end, three randomized controlled trials (Study II, III and IV) with a total of 313 participants were conducted. A prevalence study (Study I) was also conduc...

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Bibliographic Details
Main Author: Johansson, Robert
Format: Doctoral Thesis
Language:English
Published: Linköpings universitet, Psykologi 2013
Subjects:
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-100385
http://nbn-resolving.de/urn:isbn:978-91-7519-467-7 (print)
Description
Summary:The overarching goal of this thesis has been to enhance Internet-delivered psychological treatments for depression and its comorbidity. To this end, three randomized controlled trials (Study II, III and IV) with a total of 313 participants were conducted. A prevalence study (Study I) was also conducted to provide an up-to-date estimate of the prevalence of depression, anxiety disorders, and their comorbidity in the Swedish general population. Study I showed that more than every sixth individual in Sweden suffers from symptoms of depression and/or anxiety. Comorbidity between depression and anxiety was substantial and associated with higher symptom burden and lower health-related quality of life. Study II showed that a tailored Internet-based CBT protocol (ICBT) was effective in reducing symptoms of depression when compared to a control group. Among individuals with more severe depression and comorbidities, the tailored ICBT treatment worked better than standardized ICBT. Study III showed that a psychodynamic Internet-based psychotherapy was highly effective in the treatment of depression, when compared to a group who received psychoeducation and online support. In Study IV, an Internet-delivered affect-focused psychodynamic psychotherapy proved to have a large effect on depression and a moderately large effect on anxiety disorders. In conclusion, this thesis shows that in the context of treating depression and its comorbidity, Internet-delivered psychological treatments can be potentially enhanced by psychodynamic psychotherapy and by individualization. === Det övergripande syftet med denna avhandling har varit att vidareutveckla internetbaserad psykologisk behandling för depression och dess komorbiditet. Tre randomiserade kontrollerade studier (Studie II, III och IV) med totalt 313 deltagare genomfördes i linje med detta syfte. En prevalensstudie (Studie I) genomfördes också för att tillhandahålla ett uppdaterat estimat av prevalensen av depression, ångest och deras komorbiditet i Sverige. Studie I visade att mer än var sjätte individ i Sverige lider av symptom på depression och/eller ångest. Det fanns påtaglig komorbiditet mellan depression och ångest, vilket var associerat med högre symptombörda och lägre livskvalitét. Studie II visade att en skräddarsydd internetbaserad KBT-behandling var effektiv för att reducera symptom på depression, i jämförelse med en kontrollgrupp. Bland individer med svårare depression och komorbiditet, fungerade den skräddarsydda interventionen bättre än en standardiserad. Studie III visade att psykodynamisk internetbehandling var effektiv vid behandling av depression, i jämförelse med en grupp som fick psykoedukation och stödsamtal online. I Studie IV visades att en affektfokuserad psykodynamisk internetbehandling hade stor effekt vad gällde att reducera symptom på depression, och medelstor effekt vad gällde att reducera symptom på ångest. Sammanfattningsvis visar denna avhandling att internetbaserad psykologisk behandling kan potentiellt vidareutvecklas av psykodynamisk psykoterapi och individanpassning, vid behandling av depression och dess komorbiditet.