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Comorbid Major Depressive Disorder in Cognitive-Behavior
Group Treatment for Social Anxiety Disorder: An Examination
of Processes of Symptom Change
Naama Rozen
1
, Eva Gilboa-Schechtman
2
,SofiMarom
3
, Haggai Hermesh
3
, and Idan M. Aderka
1
1
School of Psychological Sciences, University of Haifa
2
Department of Psychology and the Gonda Brain Science Center, Bar-Ilan University
3
Geha Mental Health Center, Petah-Tiqwa, Israel
Individuals with social anxiety disorder (SAD) typically have elevated depressive symptoms and approxi-
mately 50% also meet criteria for major depressive disorder (MDD; Beesdo et al., 2007). In the present
study, we examined the relationship between social anxiety and depressive symptoms during cognitive-
behavior group treatment (CBGT) for SAD. Specifically, we compared individuals with SAD and comorbid
MDD and individuals with SAD without MDD to examine the role of MDD as a moderator of social
anxiety–depression relationship. Participants were 90 individuals seeking treatment for SAD (36% were
diagnosed with MDD), who completed self-report measures of social anxiety and depression every 2 weeks
during CBGT. Lower level mediational modeling indicated that for individuals without MDD, a reciprocal
relationship was observed in which changes in both social anxiety and depressive symptoms mediated
changes in each other. However, changes in social anxiety explained all subsequent changes in depression,
whereas changes in depression explained 11.26% of subsequent changes in social anxiety. For individuals
with both SAD and MDD, neither social anxiety nor depression significantly mediated changes in each
other. Our findings suggest that different processes of change occur for individuals with and without MDD
and clinical implications of these findings are discussed.
Clinical Impact Statement
Question: The present study examined the effect of comorbid MDD on processes of change in
cognitive-behavior group treatment for SAD. Findings: For individuals without MDD, changes in
social anxiety predicted changes in depression, whereas for individuals with MDD, social anxiety and
depression changed independently. Meaning: Individuals with SAD that do not meet criteria for MDD
can be treated using treatments that primarily target social anxiety, and this can lead to reductions in both
social anxiety and depressive symptoms. Individuals with a dual SAD/MDD diagnosis may require
interventions that target shared factors to reduce both social anxiety and depressive symptoms. Next
Steps: Future studies can examine treatments that are tailored to address comorbid MDD in SAD, and
this can lead to enhanced efficacy.
Keywords: social anxiety disorder, depression, cognitive behavior group therapy, lower level mediational
modeling
Social anxiety disorder (SAD) is a common, distressing, and
persistent disorder which is associated with significant impairment
in almost all facets of daily life (Aderka et al., 2012). SAD is
frequently comorbid with major depressive disorder (MDD), with
approximately 50% of individuals with SAD meeting criteria for
MDD over a 10-year period (Beesdo et al., 2007). Comorbid
depressive symptoms among individuals with SAD have been found
to predict SAD persistence (Alpert et al., 1997;Stein et al., 2001),
recurrence (Bruce et al., 2005;Scholten et al., 2013), and treatment
outcome (e.g., Wersebe et al., 2018). In addition, depressive symp-
toms have been found to be associated with severity and generali-
zation of social fears among individuals with SAD (Perugi et al.,
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This article was published Online First January 13, 2022.
Naama Rozen https://orcid.org/0000-0001-6914-9952
Eva Gilboa-Schechtman https://orcid.org/0000-0002-2831-5835
SofiMarom https://orcid.org/0000-0001-7989-9896
We have no known conflict of interest to disclose.
Naama Rozen played a lead role in conceptualization, formal analysis, and
writing of original draft. Eva Gilboa-Schechtman played a supporting role in
writing of original draft and equal role in conceptualization. SofiMarom
played a supporting role in writing of original draft. Haggai Hermesh played
a supporting role in writing of original draft. Idan M. Aderka played a lead
role in conceptualization, formal analysis, supervision, and writing of
original draft.
Correspondence concerning this article should be addressed to Idan M.
Aderka, School of Psychological Sciences, University of Haifa, 199 Aba
Khoushy Avenue, Mount Carmel, Haifa 3498838, Israel. Email: iaderka@
psy.haifa.ac.il
Psychotherapy
© 2022 American Psychological Association 2022, Vol. 59, No. 1, 48–56
ISSN: 0033-3204 https://doi.org/10.1037/pst0000413
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