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A network meta-analysis on the comparative efficacy of different dietary approaches on glycaemic control in patients with type 2 diabetes mellitus

Anna Chaimani 2 & Lukas Schwingshackl 3 Department of Nutritional Sciences, University of Vienna , Althanstraße 14, 1090 Vienna , Austria 4 Cochrane France , Paris , France 5 INSERM, UMR1153 Epidemiology

Network meta-analyses should be the highest level of evidence in treatment guidelines

only average the Anna Chaimani randomised trials comparing two treatments directly (socalled direct evidence). The major criticism has been that meta-analysis compares “apples and oranges”; are trials

Food groups and risk of chronic disease: a protocol for a systematic review and network meta-analysis of cohort studies

Background There is a lack of systematic and comprehensive evaluations whether food intakes lower or increase risk of chronic diseases. In this network meta-analysis of prospective cohort studies, we aim to evaluate the effects of different foods on risk of chronic diseases. Methods/design We will search PubMed and EMBASE. This will be supplemented by a hand search and author...

Using the contribution matrix to evaluate complex study limitations in a network meta-analysis: a case study of bipolar maintenance pharmacotherapy review

. Furukawa 0 Tomofumi Miura Anna Chaimani Stefan Leucht Andrea Cipriani Hisashi Noma Hiroshi Mitsuyasu Shegenobu Kanba Georgia Salanti 0 Department of Health Promotion and Human Behavior, Kyoto University

Characteristics and knowledge synthesis approach for 456 network meta-analyses: a scoping review

Background Network meta-analysis (NMA) has become a popular method to compare more than two treatments. This scoping review aimed to explore the characteristics and methodological quality of knowledge synthesis approaches underlying the NMA process. We also aimed to assess the statistical methods applied using the Analysis subdomain of the ISPOR checklist. Methods Comprehensive...

Evaluating the Quality of Evidence from a Network Meta-Analysis

Systematic reviews that collate data about the relative effects of multiple interventions via network meta-analysis are highly informative for decision-making purposes. A network meta-analysis provides two types of findings for a specific outcome: the relative treatment effect for all pairwise comparisons, and a ranking of the treatments. It is important to consider the...

Characteristics of Networks of Interventions: A Description of a Database of 186 Published Networks

Systematic reviews that employ network meta-analysis are undertaken and published with increasing frequency while related statistical methodology is evolving. Future statistical developments and evaluation of the existing methodologies could be motivated by the characteristics of the networks of interventions published so far in order to tackle real rather than theoretical...

Graphical Tools for Network Meta-Analysis in STATA

Network meta-analysis synthesizes direct and indirect evidence in a network of trials that compare multiple interventions and has the potential to rank the competing treatments according to the studied outcome. Despite its usefulness network meta-analysis is often criticized for its complexity and for being accessible only to researchers with strong statistical and computational...

The Quality of Reporting Methods and Results in Network Meta-Analyses: An Overview of Reviews and Suggestions for Improvement

Introduction Some have suggested the quality of reporting of network meta-analyses (a technique used to synthesize information to compare multiple interventions) is sub-optimal. We sought to review information addressing this claim. Objective To conduct an overview of existing evaluations of quality of reporting in network meta-analyses and indirect treatment comparisons, and to...