scholarly journals Risk of colectomy after conservative treatment of diverticulitis of the left hemicolon complicated by abdominal or pelvic abscess: protocol of a systematic review and meta-analysis

BMJ Open ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. e042350
Author(s):  
Maximilian Sohn ◽  
Ayman Agha ◽  
Igors Iesalnieks ◽  
Anna Tiefes ◽  
Alfred Hochrein ◽  
...  
Keyword(s):  
Systematic Review ◽  
Emergency Surgery ◽  
Case Reports ◽  
Acute Diverticulitis ◽  
Meta Analysis ◽  
Case Series ◽  
Pelvic Abscess ◽  
Risk Of Bias ◽  
Cochrane Central Register ◽  
Review Manager

IntroductionAcute diverticulitis of the sigmoid colon is increasingly treated by a non-operative approach. The need for colectomy after recovery from a flare of acute diverticulitis of the left colon, complicated diverticular abscess is still controversial. The primary aim of this study is to assess the risk of interval emergency surgery by systematic review and meta-analysis.Methods and analysisThe systematic review and meta-analysis will be conducted in accordance to the Preferred Reporting Items for Systematic Review and Meta-Analysis Protocols statement. PubMed/MEDLINE, Cochrane Central Register of Controlled Trials and EMBASE will be screened for the predefined searching term: (Diverticulitis OR Diverticulum) AND (Abscess OR pelvic abscess OR pericolic abscess OR intraabdominal abscess) AND (surgery OR operation OR sigmoidectomy OR drainage OR percutaneous drainage OR conservative therapy OR watchful waiting). All studies published in an English or German-speaking peer-reviewed journal will be suitable for this analysis. Case reports, case series of less than five patients, studies without follow-up information, systematic and non-systematic reviews and meta-analyses will be excluded. Primary endpoint is the rate of interval emergency surgery. Using the Review Manager Software (Review Manager/RevMan, V.5.3, Copenhagen, The Nordic Cochrane Centre, The Cochrane Collaboration, 2012) meta-analysis will be pooled using the Mantel-Haenszel method for random effects. The Risk of Bias in Non-randomized Studies of Interventions tool will be used to assess methodological quality of non-randomised studies. Risk of bias in randomised studies will be assessed using the Cochrane developed RoB 2-tool.Ethics and disseminationAs no new data are being collected, ethical approval is exempt for this study. This systematic review is to provide a new insight on the need for surgical treatment after a first attack of acute diverticulitis, complicated by intra-abdominal or pelvic abscesses. The results of this study will be presented at national and international meetings and published in a peer-reviewed journal.PROSPERO registration numberCRD42020164813.

scholarly journals Gastrointestinal manifestations of COVID-19 in children: a systematic review and meta-analysis

2020 ◽  
pp. flgastro-2020-101529 ◽  
Author(s):  
Anthony K Akobeng ◽  
Ciaran Grafton-Clarke ◽  
Ibtihal Abdelgadir ◽  
Erica Twum-Barimah ◽  
Morris Gordon
Keyword(s):  
Systematic Review ◽  
English Language ◽  
Case Reports ◽  
Meta Analysis ◽  
Gastrointestinal Symptoms ◽  
Case Series ◽  
Risk Of Bias ◽  
Gastrointestinal Manifestations ◽  
Published Evidence ◽  
Pooled Prevalence

ObjectivesTo summarise the published evidence on the gastrointestinal manifestations of COVID-19 in children and to determine the prevalence of gastrointestinal symptoms.MethodsIn this systematic review and meta-analysis, we searched PubMed, Embase, CINAHL and the WHO’s database of publications on novel coronavirus. We included English language studies that had described original demographic and clinical characteristics of children diagnosed with COVID-19 and reported on the presence or absence of gastrointestinal symptoms. Meta-analysis was conducted using the random-effects model. The pooled prevalence of gastrointestinal symptoms was expressed as proportion and 95% CI.ResultsThe search identified 269 citations. Thirteen studies (nine case series and four case reports) comprising data for 284 patients were included. Overall, we rated four studies as having a low risk of bias, eight studies as moderate and one study as high risk of bias. In a meta-analysis of nine studies, comprising 280 patients, the pooled prevalence of all gastrointestinal symptoms was 22.8% (95% CI 13.1% to 35.2%; I2=54%). Diarrhoea was the most commonly reported gastrointestinal symptom followed by vomiting and abdominal pain.ConclusionsNearly a quarter of children with COVID-19 have gastrointestinal symptoms. It is important for clinicians to be aware of the gastrointestinal manifestation of COVID-19.PROSPERO registration numberCRD42020177569.

scholarly journals Continuation versus discontinuation of aspirin-based antiplatelet therapy for perioperative bleeding and ischaemic events in adults undergoing neurosurgery: protocol for a systematic review and meta-analysis

BMJ Open ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. e046741
Author(s):  
Xinyan Wang ◽  
Xinxin Wang ◽  
Yun Yu ◽  
Ruquan Han
Keyword(s):  
Systematic Review ◽  
Antiplatelet Therapy ◽  
Meta Analysis ◽  
Case Series ◽  
Bleeding Risk ◽  
Original Data ◽  
Risk Of Bias ◽  
Cochrane Central Register ◽  
Case Control Studies ◽  
Perioperative Bleeding

IntroductionAntiplatelet therapy is commonly used in primary or secondary prevention of atherosclerotic and thrombotic diseases, such as coronary artery disease, transient ischaemic attack or stroke. Recent studies noted that antiplatelet therapy should be continued perioperatively in patients at high risk of thrombosis and low bleeding risk in orthopaedic, spinal or urological surgery. However, evidence in neurosurgery is lacking. Thus, we aim to conduct a systematic review and meta-analysis to assess whether the continuous use of antiplatelet drugs in neurosurgery increases the risk of perioperative bleeding.Methods and analysisWe will search PubMed, Cochrane Central Register of Controlled Trials and Embase using a strategy that combines the terms aspirin, bleeding/ischaemic and neurosurgery. Two reviewers will independently screen all identified abstracts for eligibility and evaluate the risk of bias of the included studies using the Cochrane risk of bias tool for randomised controlled studies and the Newcastle-Ottawa Scale for observational studies (including cohort studies, case–control studies, case series). Discrepancies will be resolved by consultation with a third researcher. We will conduct a systematic review and meta-analysis. If evidence suggests moderate statistical or clinical heterogeneity, we plan to investigate this heterogeneity by performing subgroup analyses and sensitivity analysis.Ethics and disseminationNo ethics approval will be sought as no original data will be collected for this review. Findings will be disseminated through peer-reviewed publication and conference presentations.PROSPERO registration numberCRD42020202590.

Mechanical thrombectomy in pediatric stroke: systematic review, individual patient data meta-analysis, and case series

2019 ◽  
Vol 24 (5) ◽  
pp. 558-571 ◽  
Author(s):  
Kartik Bhatia ◽  
Hans Kortman ◽  
Christopher Blair ◽  
Geoffrey Parker ◽  
David Brunacci ◽  
...  
Keyword(s):  
Systematic Review ◽  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Mechanical Thrombectomy ◽  
Case Reports ◽  
Meta Analysis ◽  
Case Series ◽  
Neurological Outcomes

OBJECTIVEThe role of mechanical thrombectomy in pediatric acute ischemic stroke is uncertain, despite extensive evidence of benefit in adults. The existing literature consists of several recent small single-arm cohort studies, as well as multiple prior small case series and case reports. Published reports of pediatric cases have increased markedly since 2015, after the publication of the positive trials in adults. The recent AHA/ASA Scientific Statement on this issue was informed predominantly by pre-2015 case reports and identified several knowledge gaps, including how young a child may undergo thrombectomy. A repeat systematic review and meta-analysis is warranted to help guide therapeutic decisions and address gaps in knowledge.METHODSUsing PRISMA-IPD guidelines, the authors performed a systematic review of the literature from 1999 to April 2019 and individual patient data meta-analysis, with 2 independent reviewers. An additional series of 3 cases in adolescent males from one of the authors’ centers was also included. The primary outcomes were the rate of good long-term (mRS score 0–2 at final follow-up) and short-term (reduction in NIHSS score by ≥ 8 points or NIHSS score 0–1 at up to 24 hours post-thrombectomy) neurological outcomes following mechanical thrombectomy for acute ischemic stroke in patients < 18 years of age. The secondary outcome was the rate of successful angiographic recanalization (mTICI score 2b/3).RESULTSThe authors’ review yielded 113 cases of mechanical thrombectomy in 110 pediatric patients. Although complete follow-up data are not available for all patients, 87 of 96 (90.6%) had good long-term neurological outcomes (mRS score 0–2), 55 of 79 (69.6%) had good short-term neurological outcomes, and 86 of 98 (87.8%) had successful angiographic recanalization (mTICI score 2b/3). Death occurred in 2 patients and symptomatic intracranial hemorrhage in 1 patient. Sixteen published thrombectomy cases were identified in children < 5 years of age.CONCLUSIONSMechanical thrombectomy may be considered for acute ischemic stroke due to large vessel occlusion (ICA terminus, M1, basilar artery) in patients aged 1–18 years (Level C evidence; Class IIb recommendation). The existing evidence base is likely affected by selection and publication bias. A prospective multinational registry is recommended as the next investigative step.

Abstract 20: The Effect of Resistance Training on Survival and Cardiovascular Outcomes: A Systematic Review and Meta-Analysis

2018 ◽  
Vol 11 (suppl_1) ◽  
Author(s):  
Farzane Saeidifard ◽  
Jose R Medina Inojosa ◽  
Colin P West ◽  
Thomas P Olson ◽  
Virend K Somers ◽  
...  
Keyword(s):  
Systematic Review ◽  
Heart Disease ◽  
Resistance Training ◽  
Subgroup Analysis ◽  
Cancer Mortality ◽  
Meta Analysis ◽  
Cardiovascular Outcomes ◽  
Risk Of Bias ◽  
Cochrane Central Register ◽  
All Cause Mortality

Background: This is the first systematic review and meta-analysis to investigate the effect of resistance training (RT) on survival and other cardiovascular outcomes including ischemic heart disease events and stroke. Methods: An experienced librarian searched databases up to September 25 th , 2017, for randomized trials and cohort studies that evaluated the effect of RT on survival and cardiovascular events in the general population. The databases included Ovid MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, and Scopus. Two investigators conducted the screening process independently and in duplicate. Cochrane tools were used to assess the risk of bias in clinical trials and observational studies. We calculated hazard ratios and 95% confidence intervals using RevMan and fixed and random effect models and had a subgroup analysis based on doses of RT and for the combination of RT and aerobic exercise (AE) vs no exercise. Results: The search identified 1429 studies from which 10 (one randomized trial) met the inclusion criteria, including 338,254 participants with a mean follow up of 8.14 years. The meta-analysis showed that RT, in comparison with no exercises, is associated with 24% lower all-cause mortality and 48% lower mortality when combined with AE. Based on subgroup analysis, performing 1-2 sessions of RT/week is associated with lower all-cause mortality by 28% (HR 0.72, 95% CI 0.66-0.78) whereas > 5 sessions of RT/week has no association with all-cause mortality (HR 0.99, 95% CI 0.76-1.31). Further, RT alone or combined with AE is associated with lower CV mortality compared to no exercise (Figures). Finally, RT alone also showed a borderline association with lower all-cancer mortality. Heterogeneity was present for several comparisons, and subsequent analysis will explore sources of this variability. Using study design-specific Cochrane risk of bias tools, no major sources of bias were identified in the included studies. One cohort study looked at the effect of RT on coronary heart disease events and found 23% risk reduction in men, while no study specifically assessed the effect of RT on cerebrovascular outcomes. Conclusion: RT is associated with lower all-cause, CV and all-cancer mortality. RT appears to have an additive effect when combined with AE.

Neurological associations of SARS-CoV-2 infection: A Systematic Review

2021 ◽  
Vol 20 ◽  
Author(s):  
Amaan Javed
Keyword(s):  
Systematic Review ◽  
Case Reports ◽  
Case Series ◽  
Severe Infection ◽  
Cerebrovascular Diseases ◽  
Controlled Vocabulary ◽  
Cochrane Central Register ◽  
Post Traumatic Stress ◽  
Medical Subject Headings ◽  
Reported Data

Background: The current ongoing COVID-19 pandemic has compelled us to scrutinize major outbreaks in the past two decades, severe acute respiratory syndrome (SARS), in 2002, and Middle East respiratory syndrome (MERS), in 2012. We aimed to assess the associated neurological manifestations with SARS CoV-2 infection. Methods: In this systematic review, a search was carried out by key-electronic databases, controlled vocabulary, and indexing of trials to evaluate the available pertinent studies which included both medical subject headings (MeSH) and advance electronic databases comprising of PubMed, Embase, Scopus, Cochrane Central Register of Controlled Trials (CENTRAL). Peer-reviewed studies published in English and Spanish were considered which reported data on the neurological associations of individuals with suspected or laboratory-confirmed SARS-CoV-2 infection. Outcomes were nervous signs or symptoms; symptom severity; and diagnoses. Findings: Our search identified 45 relevant studies, with 21 case reports, 3 case series, 9 observational studies, 1 retrospective study, 9 retrospective reviews, and 2 prospective reviews. This systematic review revealed that most commonly reported neuronal presentations involved headache, nausea, vomiting and muscular symptoms like fibromyalgia. Anosmia and ageusia, defects in clarity or sharpness of vision (error in visual acuity), and pain may occur in parallel. Notable afflictions in the form of anxiety, anger, confusion, post-traumatic stress symptoms, and post-intensive care syndrome were observed in individuals who were kept in quarantine and those with long-stay admissions in healthcare settings. SARS CoV-2 infection may result in cognitive impairment. Patients with more severe infection exhibited uncommon manifestations, such as acute cerebrovascular diseases (intracerebral haemorrhage, stroke), rhabdomyolysis, encephalopathy, Guillain-Barré syndrome. Interpretation: SARS-CoV-2 patients experience neuronal presentations varying with the progression of the infection. Healthcare professionals should be acquainted with the divergent neurological symptoms and to curb misdiagnosis and limit long term sequelae. Health-care planners and policymakers must prepare for this eventuality, while the ongoing studies increase our knowledge base on acute and chronic neurological associations of this pathogen.

scholarly journals Systematic review to investigate the safety of induction and augmentation of labour among pregnant women with iron-deficiency anaemia

BMJ Open ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. e021793 ◽  
Author(s):  
Kathryn Bunch ◽  
Nia Roberts ◽  
Marian Knight ◽  
Manisha Nair
Keyword(s):  
Systematic Review ◽  
Iron Deficiency ◽  
Pregnant Women ◽  
Iron Deficiency Anaemia ◽  
Case Reports ◽  
Case Series ◽  
Severe Anaemia ◽  
Risk Of Bias ◽  
Deficiency Anaemia ◽  
Increased Risk

ObjectiveTo conduct a systematic review to investigate the safety of induction and/or augmentation of labour compared with spontaneous-onset normal labour among pregnant women with iron-deficiency anaemia.DesignSystematic review.SettingStudies from all countries, worldwide.PopulationPregnant women with iron-deficiency anaemia at labour and delivery.InterventionAny intervention related to induction and/or augmentation of labour.Outcome measuresPrimary: Postpartum haemorrhage (PPH), heart failure and maternal death. Secondary: Emergency caesarean section, hysterectomy, admission to intensive care unit.MethodWe searched 10 databases, including Medline and Embase, from database inception to 1 October 2018. We included all study designs except cross-sectional studies without a comparator group, case reports, case series, ecological studies, and expert opinion. The searches were conducted by a healthcare librarian and two authors independently screened and reviewed the studies. We used the Grading of Recommendations, Assessment, Development and Evaluations (GRADE) approachto ascertain risk of bias and conducted a narrative synthesis.ResultsWe identified 3217 journal articles, 223 conference papers, 45 dissertations and 218 registered trials. Ten articles were included for full-text review and only one was found to fulfil the eligibility criteria. This was a retrospective cohort study from India, which showed that pregnant women with moderate and severe anaemia could have an increased risk of PPH if they underwent induction and/or augmentation of labour, but the evidence was weak (graded as ‘high risk of bias’).ConclusionThe best approach is to prevent anaemia, but a large number of women in low-to-middle-income countries present with severe anaemia during labour. In such women, appropriate peripartum management could prevent complications and death. Our review showed that at present we do not know if induction and augmentation of labour is safe in pregnant women with iron-deficiency anaemia and further research is required.PROSPERO registration numberCRD42015032421.

scholarly journals Effectiveness of orthodontic temporary anchorage devices in canine retraction and anchorage preservation during the two-step technique: a systematic review and meta-analysis

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Haonan Tian ◽  
Congman Xie ◽  
Min Lin ◽  
Hongmei Yang ◽  
Aishu Ren
Keyword(s):  
Systematic Review ◽  
Meta Analysis ◽  
Risk Of Bias ◽  
Controlled Trials ◽  
Cochrane Central Register ◽  
Canine Retraction ◽  
Temporary Anchorage Devices ◽  
The Mean ◽  
Mean Differences ◽  
Implant Anchorage

Abstract Background Temporary anchorage devices have been used for decades in orthodontic practice for many applications. The aim of this systematic review was to assess the effectiveness of orthodontic temporary anchorage devices in canine retraction during the two-step technique. Methods A search was systematically performed for articles published prior to June 30, 2019 in five electronic databases (PubMed, Embase, Cochrane Central Register of Controlled Trials, Web of Science, Scopus). The risk of bias was assessed using the Cochrane risk of bias tool for randomized controlled trials (RCTs) and the risk of bias in nonrandomized studies of interventions (ROBINS-I) tool for controlled clinical trials (CCTs). The Grading of Recommendation, Assessment, Development and Evaluation (GRADE) approach was used for the quality assessment. Data concerning the mean difference in mesial molar movement and extent of canine retraction were extracted for statistical analysis. The mean differences and 95% confidence intervals were analyzed for continuous data. A meta-analysis with a random-effects model for comparable outcomes was carried out. Results Three RCTs and five CCTs were finally included. Meta-analysis showed a significant increase not only in anchorage preservation in the implant anchorage group in both the maxilla (1.56 mm, 95% CI: 1.14 to 1.98, P < 0.00001) and the mandible (1.62 mm, 95% CI: 1.24 to 2.01, P < 0.00001) but also in canine retraction in the implant anchorage group in both the maxilla (0.43 mm, 95% CI: 0.16 to 0.69, P = 0.001) and the mandible (0.26 mm, 95% CI: 0.02 to 0.49, P = 0.03). Conclusions There is very low-quality evidence showing that implant anchorage is more efficient than conventional anchorage during canine retraction. Additional high-quality studies are needed.

scholarly journals COVID-19 and Influenza Co-infection: A Systematic Review and Meta-Analysis

2021 ◽  
Vol 8 ◽  
Author(s):  
Masoud Dadashi ◽  
Saeedeh Khaleghnejad ◽  
Parisa Abedi Elkhichi ◽  
Mehdi Goudarzi ◽  
Hossein Goudarzi ◽  
...  
Keyword(s):  
Systematic Review ◽  
Case Reports ◽  
Influenza Infection ◽  
Meta Analysis ◽  
Clinical Manifestations ◽  
Case Series ◽  
Influenza Viruses ◽  
Original Research ◽  
Respiratory Pathogens ◽  
Prevalence Studies

Background and Aim: Co-infection of COVID-19 with other respiratory pathogens which may complicate the diagnosis, treatment, and prognosis of COVID-19 emerge new concern. The overlap of COVID-19 and influenza, as two epidemics at the same time can occur in the cold months of the year. The aim of current study was to evaluate the rate of such co-infection as a systematic review and meta-analysis.Methods: A systematic literature search was performed on September 28, 2019 for original research articles published in Medline, Web of Science, and Embase databases from December 2019 to September 2020 using relevant keywords. Patients of all ages with simultaneous COVID-19 and influenza were included. Statistical analysis was performed using STATA 14 software.Results: Eleven prevalence studies with total of 3,070 patients with COVID-19, and 79 patients with concurrent COVID-19 and influenza were selected for final evaluation. The prevalence of influenza infection was 0.8% in patients with confirmed COVID-19. The frequency of influenza virus co-infection among patients with COVID-19 was 4.5% in Asia and 0.4% in the America. Four prevalence studies reported the sex of patients, which were 30 men and 31 women. Prevalence of co-infection with influenza in men and women with COVID-19 was 5.3 and 9.1%, respectively. Eight case reports and 7 case series with a total of 123 patients with COVID-19 were selected, 29 of them (16 men, 13 women) with mean age of 48 years had concurrent infection with influenza viruses A/B. Fever, cough, and shortness of breath were the most common clinical manifestations. Two of 29 patients died (6.9%), and 17 out of 29 patients recovered (58.6%). Oseltamivir and hydroxychloroquine were the most widely used drugs used for 41.4, and 31% of patients, respectively.Conclusion: Although a low proportion of COVID-19 patients have influenza co-infection, however, the importance of such co-infection, especially in high-risk individuals and the elderly, cannot be ignored. We were unable to report the exact rate of simultaneous influenza in COVID-19 patients worldwide due to a lack of data from several countries. Obviously, more studies are needed to evaluate the exact effect of the COVID-19 and influenza co-infection in clinical outcomes.

scholarly journals Relationship between hormonal contraceptives and sleep among women of reproductive age: a systematic review protocol

BMJ Open ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. e045819
Author(s):  
Jinhui Ma ◽  
Megan Cheng ◽  
Lehana Thabane ◽  
Caihong Ma ◽  
Ning Zhang ◽  
...  
Keyword(s):  
Systematic Review ◽  
Meta Analysis ◽  
Research Question ◽  
Risk Of Bias ◽  
Reproductive Age ◽  
Hormonal Contraceptives ◽  
Controlled Trials ◽  
Cochrane Central Register ◽  
Women Of Reproductive Age

IntroductionThe aetiology of sleep disruptions is unknown, but hormonal fluctuations during the menstrual cycle, pregnancy and menopause have been shown to potentially affect how well a woman sleeps. The aim of this systematic review was to investigate whether hormonal contraceptives are associated with a decreased quality of sleep and increased sleep duration in women of reproductive age.MethodsThis review will analyse data from randomised controlled trials or non-randomised comparative studies investigating the association between hormonal contraceptives and sleep outcomes among women of reproductive age. Reviews addressing the same research question with similar eligibility criteria will be included. A literature search will be performed using the MEDLINE, Embase and Cochrane Central Register of Controlled Trials databases from inception to 7 March 2021. The Cochrane Collaboration’s Risk of Bias for Randomised Trials V.2.0 and The Risk of Bias for Non-randomised Studies of Interventions tool will be used to assess risk of bias for each outcome in eligible studies. Two reviewers will independently assess eligibility of studies and risk of bias and extract the data. All extracted data will be presented in tables and narrative form. For sleep measures investigated by two or more studies with low heterogeneity, we will conduct random-effects meta-analysis to estimate the magnitude of the overall effect of hormonal contraceptives. If studies included in this systematic review form a connected network, a network meta-analysis will be conducted to estimate the comparative effect of different contraceptives. The Grading of Recommendations, Assessment, Development, and Evaluation approach will be used to summarise the quality of evidence. Our protocol follows the Preferred Reporting Items for Systematic Reviews and Meta-Analyses for Protocols 2015 guidelines.Ethics and disseminationEthics approval is not required as data were sourced from previously reported studies. The findings of this review will be published in a peer-reviewed journal and presented at relevant conferences.PROSPERO registration numberCRD42020199958.

The effects of non-clinician guidance on effectiveness and process outcomes of digital mental health interventions: A systematic review and meta-analysis. (Preprint)

2021 ◽  
Author(s):  
Calista Leung ◽  
Julia Pei ◽  
Kristen Hudec ◽  
Farhud Shams ◽  
Richard Munthali ◽  
...  
Keyword(s):  
Mental Health ◽  
Systematic Review ◽  
Psychosocial Support ◽  
Meta Analysis ◽  
Grey Literature ◽  
Risk Of Bias ◽  
Health Interventions ◽  
Cochrane Central Register ◽  
Process Outcomes ◽  
Mental Health Interventions

BACKGROUND Digital mental health interventions are increasingly prevalent in the current context of rapidly evolving technology, and research indicates that they yield effectiveness outcomes comparable to in-person treatment. Integrating professionals (i.e. psychologists, physicians) into digital mental health interventions has been common, and the inclusion of guidance within programs can increase adherence to interventions. However, employing professionals to enhance mental health programs may undermine the scalability of digital interventions. Therefore, delegating guidance tasks to paraprofessionals (peer supporters, technicians, lay counsellors, or other non-clinicians) can help reduce costs and increase accessibility. OBJECTIVE This systematic review and meta-analysis evaluates the effectiveness, adherence, and other process outcomes of non-clinician guided digital mental health interventions. METHODS Four databases (MEDLINE, EMBASE, CINAHL, and PSYCInfo) were searched for randomized controlled trials published between 2010 and 2020 examining digital mental health interventions. Three journals focused on digital intervention were also hand searched and grey literature was searched using ProQuest and the Cochrane Central Register of Control Trials (CENTRAL). Two researchers independently assessed risk of bias using the Cochrane Risk of Bias Tool 2. Data were collected on effectiveness, adherence, and other process outcomes, and meta-analyses were conducted for effectiveness and adherence outcomes. Non-clinician guided interventions were compared with treatment as usual, clinician-guided interventions, and unguided interventions. RESULTS Thirteen studies qualified for inclusion. Results indicate that non-clinician guided interventions yielded higher post-treatment effectiveness outcomes when compared to conditions involving control programs (e.g. online psychoeducation, monitored attention control) or waitlist controls (k=7, Hedges g=-0.73 (95% CI -1.08 to -0.38)). There are significant differences between non-clinician guided interventions and unguided interventions as well (k=6, Hedges g=-0.17 (95% CI -0.23 to -0.11)). In addition, non-clinician guided interventions did not differ in effectiveness from clinician-guided interventions (k=3, Hedges g=0.08 (95% CI -0.01 to 0.17)). These results suggest that guided digital mental health interventions are helpful to improve mental health outcomes regardless of the qualification, and that the presence of a non-clinician guide improves effectiveness outcomes more than no guidance. Non-clinician guided interventions did not yield significantly different effects on adherence outcomes when compared with unguided interventions (k=3, OR 1.58 (95% CI 0.51 to 4.92)), although a general trend of improved adherence was observed within non-clinician guided interventions. CONCLUSIONS Integrating paraprofessionals and non-clinicians appear to improve outcomes of digital mental health interventions, and may also enhance adherence outcomes (though the trend was nonsignificant). Further research should focus on the specific types of tasks these paraprofessionals can successfully provide (i.e. psychosocial support, therapeutic alliance, technical augmentation) and their associated outcomes. CLINICALTRIAL The protocol is preregistered on PROSPERO (CRD42020191226).

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