background :    although, nontuberculous mycobacteria can cause disease in different organisms, they usually are not reported in most countries because scientists in general consider them as non-pathogens. but, increasing nontuberculous mycobacteria diseases occurrence has changed this belief. nevertheless, there is no meta-analysis review about prevalence of nontuberculous mycobacteria in iran...

INTRODUCTION When participants drop out of randomised clinical trials, as frequently happens, the intention-to-treat (ITT) principle does not apply, potentially leading to attrition bias. Data lost from patient dropout/lack of follow-up are statistically addressed by imputing, a procedure prone to bias. Deviations from the original definition of ITT are referred to as modified intention-to-trea...

ed data, and assessed the risk of bias. Using the FDA trials and the published trials, we performed pair-wise meta-analyses and Bayesian network meta-analyses on intraocular pressure at 3 months, our pre-specified primary outcome. We compared the results from these analyses.

OBJECTIVE To examine whether the exclusion of individual treatment comparators, including placebo/no treatment, affects the results of network meta-analysis. DESIGN Survey of networks with individual trial data. DATA SOURCES PubMed and communication with authors of network meta-analyses. STUDY SELECTION AND METHODS We included networks that had five or more treatments, contained at least ...

OBJECTIVE To establish the extent to which systematic reviews and meta-analyses of individual participant data (IPD) are being used to inform the recommendations included in published clinical guidelines. DESIGN Descriptive study. SETTING Database maintained by the Cochrane IPD Meta-analysis Methods Group, supplemented by records of published IPD meta-analyses held in a separate database. ...

Network meta-analysis provides a global estimate of comparative treatment effectiveness combining both direct and indirect evidence. In the past decade, the medical literature has witnessed a rapid increase in the possibility to combine evidence from different treatment comparisons. This opportunity is attractive for clinicians since their major concern is to identify the single best available ...

INTRODUCTION Individual patient data (IPD) meta-analysis (MA) offers advantages over aggregate MA of using standardised criteria for patient characteristics across trials, and allowing reliable investigation of subgroup effects of interventions. Network meta-analysis (NMA) allows for the comparison of multiple treatments in a comprehensive analysis and the determination of the best treatment am...

OBJECTIVE To examine how the results of network meta-analyses are reported. DESIGN Methodological systematic review of published reports of network meta-analyses. DATA SOURCES Cochrane Database of Systematic Reviews, Database of Abstracts of Reviews of Effects, Medline, and Embase, searched from inception to 12 July 2012. STUDY SELECTION All network meta-analyses comparing the clinical ef...

This article describes the Preferred Reporting Items of Systematic Reviews and Meta-Analyses (PRISMA) guidelines that are intended to help authors improve the reporting of systematic reviews and meta-analyses, illustrating with examples from the Oncology Nursing Society journals and Putting Evidence Into Practice resources.

Because of the methodological complexity of network meta-analyses (NMAs), NMAs may be more vulnerable to methodological risks than conventional pair-wise meta-analysis. Our study aims to investigate epidemiology characteristics, conduction of literature search, methodological quality and reporting of statistical analysis process in the field of cancer based on PRISMA extension statement and mod...