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Online cognitive-based intervention for depression: exploring possible circularity in mechanisms of change

Published online by Cambridge University Press:  18 July 2013

R. van der Zanden ,
F. Galindo-Garre ,
K. Curie ,
J. Kramer  and
P. Cuijpers
R. van der Zanden*
Affiliation:
Centre for Youth Mental Health Studies, Trimbos Institute, Utrecht, The Netherlands
F. Galindo-Garre
Affiliation:
EMGO Institute for Health and Care Research, Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
K. Curie
Affiliation:
Department of Health Sciences, VU University, Amsterdam, The Netherlands
J. Kramer
Affiliation:
Innovation Centre of Mental Health and Technology, Trimbos Institute, Utrecht, The Netherlands
P. Cuijpers
Affiliation:
Department of Clinical Psychology and EMGO Institute for Health and Care Research, VU University, Amsterdam, The Netherlands
*
* Address for correspondence: R. van der Zanden, Centre for Youth Mental Health, Trimbos Institute, Da Costakade 45, 3500 AS Utrecht, The Netherlands. (Email: rzanden@trimbos.nl)
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Abstract

Background

This study investigates possible circularity in mechanisms of change in participants of Master Your Mood (MYM), a cognitive-based, online intervention for young adults with depressive symptoms. A previous study showed that MYM effectively reduced depression and anxiety and strengthened mastery.

Method

We randomized 244 participants with depressive symptoms into MYM or a wait-list control condition. We explored the circularity hypothesis by several analyses. Correlations were computed to determine the association between (change in) depression and anxiety. Path analysis mediation models were used to explore whether change in anxiety and mastery mediated the intervention effect on depression, whether depression and mastery mediated the effect on anxiety and whether depression and anxiety mediated the effect on mastery. We used linear regression to explore whether early changes in anxiety predicted later changes in depression, and whether early changes in depression predicted later changes in anxiety.

Results

Co-morbidity between depression and anxiety was high (69.2%) and the association between depression and anxiety change was strong (r = 0.677, p < 0.01). Changes in anxiety and mastery mediated change in depression (mediation proportion 44%); changes in depression mediated change in anxiety (79%) and mastery (75%). We did not find an early change in anxiety predictive for a late change in depression, and vice versa.

Conclusions

This study appears to confirm the hypothesized circularity in the recovery process. We found high co-morbidity and strong correlation between depression and anxiety levels and bi-directional relationships between potential mediators and outcomes. Early anxiety change scores were not predictive of late depression change scores, and vice versa.

Keywords

Adolescentscognitive behavioral therapydepressionmechanisms of changemediation analysis
Type
Original Articles
Information
Psychological Medicine , Volume 44 , Issue 6 , April 2014 , pp. 1159 - 1170
Copyright
Copyright © Cambridge University Press 2013 

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