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Behav Ther. 2018 Jan;49(1):71-83. doi: 10.1016/j.beth.2017.05.004. Epub 2017 May 25.

Effectiveness of Web- and Mobile-Based Treatment of Subthreshold Depression With Adherence-Focused Guidance: A Single-Blind Randomized Controlled Trial.

Author information

1
Friedrich-Alexander University Erlangen-Nuremberg; Leuphana University Lueneburg. Electronic address: david.ebert@fau.de.
2
Friedrich-Alexander University Erlangen-Nuremberg; Leuphana University Lueneburg; VU University Amsterdam.
3
Leuphana University Lueneburg.
4
VU University Amsterdam; Trimbos Institute.
5
Leuphana University Lueneburg; VU University Amsterdam; University of Southern Denmark.
6
University of Ulm.
7
Leuphana University Lueneburg; VU University Amsterdam.
8
Friedrich-Alexander University Erlangen-Nuremberg; Leuphana University Lueneburg.

Abstract

Evidence for the impact of psychological Interventions for subthreshold depression (sD) is conflicting. Moreover, human resources to deliver such treatments are limited. This study aimed to evaluate the effectiveness of a web-based intervention with adherence-focused guidance in the treatment of sD. Participants with sD (CES-D≥ 16, no Major Depressive Disorder according to DSM-IV criteria, N = 204) recruited via a large health insurance were randomly allocated to a web-based mobile-supported cognitive-behavioral intervention or to a waitlist control condition with unrestricted access to usual care. The primary outcome was the reduction in depressive symptom severity as measured by blind diagnostic raters using the Quick Inventory of Depressive Symptomatology (QIDS) at posttreatment. There was a statistically significant between-group difference in QIDS scores at posttreatment in favor of the intervention group, F(1, 201) = 11.31, p = .001, corresponding to a medium effect size of d = 0.37 (95% CI 0.09-0.64) and a NNT of 7 (95%-CI 3.7-41.2). Significant effects in favour of the intervention group were also found for secondary outcomes such as quality of life, anxiety, and insomnia severity. Web-based self-help interventions with adherence-focused guidance could be an acceptable and effective approach to reduce a range of negative consequences associated with subclinical depression.

KEYWORDS:

clinician-rated; minor depression; subthreshold depression; web-based intervention

PMID:
29405923
DOI:
10.1016/j.beth.2017.05.004
[Indexed for MEDLINE]

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