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Response and Remission Rates in Internet-Based Cognitive Behavior Therapy: An Individual Patient Data Meta-Analysis
Stockholms universitet, Samhällsvetenskapliga fakulteten, Psykologiska institutionen, Klinisk psykologi. University of Southern Denmark, Denmark.
2019 (engelsk)Inngår i: Frontiers in Psychiatry, ISSN 1664-0640, E-ISSN 1664-0640, Vol. 10, artikkel-id 749Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Background: Internet-delivered cognitive behavior therapy (ICBT) was developed over 20 years ago and has since undergone a number of controlled trials, as well as several systematic reviews and meta-analyses. However, the crucial question of response rates remains to be systematically investigated. The aim of this individual patient meta-analysis (IPDMA) was to use a large dataset of trials conducted in Sweden to determine reliable change and recovery rates across trials for a range of conditions.

Methods: We used previously collected and aggregated data from 2,866 patients in 29 Swedish clinical trials of ICBT for three categories of conditions: anxiety disorders, depression, and others. Raw scores at pre-treatment and post-treatment were used in an IPDMA to determine the rate of reliable change and recovery. Jacobson and Truax’s, (1991) reliable change index (RCI) was calculated for each primary outcome measure in the trials as well as the recovery rates for each patient, with the additional requirement of having improved substantially. We subsequently explored potential predictors using binomial logistic regression.

Results: In applying an RCI of z = 1.96, 1,162 (65.6%) of the patients receiving treatment were classified as achieving recovery, and 620 (35.0%) were classified as reaching remission. In terms of predictors, patients with higher symptom severity on the primary outcome measure at baseline [odds ratio (OR) = 1.36] and being female (OR = 2.22) increased the odds of responding to treatment. Having an anxiety disorder was found to decrease the response to treatment (OR = 0.51). Remission was predicted by diagnosis in the same direction (OR = 0.28), whereas symptom severity was inversely predictive of worse outcome (OR = 0.81). Conclusions: Response seems to occur among approximately half of all clients administered ICBT, whereas about a third reach remission. This indicates that the efficacy of ICBT is in line with that of CBT based in prior trials, with a possible caveat being the lower remission rates. Having more symptoms and being female might increase the chances of improvement, and a small negative effect of having anxiety disorder versus depression and other conditions may also exist. A limitation of the IPDMA was that only studies conducted in Sweden were included.

sted, utgiver, år, opplag, sider
2019. Vol. 10, artikkel-id 749
Emneord [en]
response rates, recovery, predictors, individual patient data meta-analysis, internet-based cognitive behavior therapy
HSV kategori
Forskningsprogram
psykologi
Identifikatorer
URN: urn:nbn:se:su:diva-176352DOI: 10.3389/fpsyt.2019.00749ISI: 000494725100001OAI: oai:DiVA.org:su-176352DiVA, id: diva2:1374854
Tilgjengelig fra: 2019-12-03 Laget: 2019-12-03 Sist oppdatert: 2019-12-09bibliografisk kontrollert

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