Evidence map›Paper›PMID 33225589›Full record

SynthesisDepression and anxiety2021

The effectiveness of Internet-delivered treatment for generalized anxiety disorder: An updated systematic review and meta-analysis.

Nora Eilert, Angel Enrique, Rebecca Wogan, Olwyn Mooney, Ladislav Timulak, Derek Richards

2 registry-linked trialsAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Depression and anxiety, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 28 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 3 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT06797076 nanot yet recruitingnot on this mapstarted 2026, after this paper: background citation

Evaluating an App-Based Treatment for Migraine: The Health enSuite Migraine Study

TypeinterventionalSponsorIWK Health CentreRan2026 to 2027Enrolled415ConditionsMigraine, Migraine With Aura, Migraine Without AuraArmsHealth enSuite Headache
NCT06856161 recruitingnot on this mapstarted 2025, after this paper: background citation

A Novel Blood Test as a Differential Diagnosis and Drug Efficacy Biomarker in Mental Health

TypeobservationalSponsorFraser HealthRan2025 to 2027Enrolled500ConditionsDepression - Major Depressive Disorder, Schizophenia Disorder, Psychosis, Mania (Neurotic)
3 · Its place in the literature

Who cites it

28 citing papers in PubMed, 3 syntheses or guidelines pooled it.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Nora EilertSchool of Psychology, E-Mental Health Research Group, Trinity College Dublin, University of Dublin, Dublin, Ireland.ORCID 0000-0003-3184-3599
Angel EnriqueSchool of Psychology, E-Mental Health Research Group, Trinity College Dublin, University of Dublin, Dublin, Ireland.
Rebecca WoganClinical Research & Innovation, SilverCloud Health, Dublin, Ireland.
Olwyn MooneyClinical Research & Innovation, SilverCloud Health, Dublin, Ireland.
Ladislav TimulakSchool of Psychology, E-Mental Health Research Group, Trinity College Dublin, University of Dublin, Dublin, Ireland.
Derek RichardsSchool of Psychology, E-Mental Health Research Group, Trinity College Dublin, University of Dublin, Dublin, Ireland.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGeneralized anxiety disorder (GAD) is a highly prevalent, chronic disorder associated with impaired quality of life, societal burden, and poor treatment rates. Internet-delivered interventions may improve the accessibility of treatments and are increasingly being used. This study aimed to update a previous meta-analysis to determine the effectiveness of available Internet-delivered interventions in treating symptoms of GAD.

methodSystematic literature searches were conducted (through April 2020) using Embase, PubMed, PsychINFO, and Cochrane to find randomized controlled trials of Internet-delivered interventions for GAD. Risk of bias was evaluated, and Hedge's g was calculated at posttreatment and follow-up.

resultsTwenty studies met eligibility criteria and were included in the meta-analysis. Random-effect models detected large effect sizes for primary outcomes of anxiety (g = 0.79) and worry (g = 0.75), favoring treatment. Effect sizes for depression, functional impairment, and quality of life were moderate to large. Maintenance of effects at follow-up seems likely.

conclusionsResults support the effectiveness of Internet-delivered treatments for GAD. Considerable heterogeneity between studies appeared moderated by variability in the interventions themselves, highlighting the importance of further investigation into the characteristics that may optimize treatment outcomes. Overall, Internet-delivery appears to be a viable mode of treatment for GAD with potential to relieve existing gaps in the provision of treatment.

Indexed as

Cognitive Behavioral TherapyQuality of LifeAnxietyAnxiety DisordersDepressionHumansInternetanxietygeneralized anxiety disorderInternet-based treatmentInternet-delivered treatmentmeta-analysisrandomized controlled trial

Identifiers

PMID33225589
PMCPMC7894171

What OpenQuestion holds

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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.