TY  - JOUR
A1  - Domhardt, Matthias
A1  - Gesslein, Helene
A1  - von Rezori, Roman Enzio
A1  - Baumeister, Harald
T1  - Internet- and mobile-based interventions for anxiety disorders
BT  - a meta-analytic review of intervention components
JF  - Depreddion and anxiety
N2  - BackgroundAlthough the efficacy of Internet- and mobile-based interventions (IMIs) for anxiety is established, little is known about the intervention components responsible for therapeutic change. We conducted the first comprehensive meta-analytic review of intervention components of IMIs for adult anxiety disorders. MethodsRandomized controlled trials (RCTs) comparing IMIs for anxiety disorders to active online control groups, or IMIs to dismantled variations of the same intervention ( specific components) were identified by a systematic literature search in six databases. Outcomes were validated observer-rated or self-report measures for anxiety symptom severity and treatment adherence (number of completed modules and completer rate). This meta-analytic review is registered with PROSPERO (CRD42017068268). ResultsWe extracted the data of 34 RCTs (with 3,724 participants) and rated the risk of bias independently by two reviewers. Random-effects meta-analyses were performed on 19 comparisons of intervention components (i.a., different psychotherapeutic orientations, disorder-specific vs. transdiagnostic approaches, guidance factors). IMIs had a large effect when compared to active online controls on symptom severity (standardized mean difference [SMD] of -1.67 [95% CI: -2.93, -0.42]; P=0.009). Thereby, guided IMIs were superior to unguided interventions on symptom severity (SMD of -0.39 [95% CI: -0.59, -0.18]; P=0.0002) and adherence (SMD of 0.38 [95% CI: 0.10, 0.66]; P=0.007). ConclusionsOverall, the results of this meta-analysis lend further support to the efficacy of IMIs for anxiety, pointing to their potential to augment service supplies. Still, future research is needed to determine which ingredients are essential, as this meta-analytic review found no evidence for incremental effects of several single intervention components apart from guidance.
KW  - active ingredient
KW  - change mechanism
KW  - common and specific factor
KW  - e-health
KW  - guidance
KW  - psychotherapy
Y1  - 2019
U6  - https://doi.org/10.1002/da.22860
SN  - 1091-4269
SN  - 1520-6394
VL  - 36
IS  - 3
SP  - 213
EP  - 224
PB  - Wiley
CY  - Hoboken
ER  -