meta-analysis

(redirected from Meta-analyses)
Also found in: Dictionary, Encyclopedia.

meta-analysis

 [met″ah-ah-nal´ĭ-sis]
any systematic method that uses statistical analysis to integrate the data from a number of independent studies.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

meta analysis

A method that uses statistical techniques to combine results from different studies and obtain a quantitative estimate of the overall effect of a particular intervention or variable on a defined outcome—i.e., it is a statistical process for pooling data from many clinical trials to glean a clear answer. Meta-analysis produces a stronger conclusion than can be provided by any individual study.

Cons
Bias, potential for analytical sloppiness, lack of understanding of basic issues, failure to consider major covariates, and overstating the strengths and precision of the results.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

meta-analysis

Data synthesis, quantitative overview Data analysis A systematic method that uses statistical techniques for combining results from different studies to obtain a quantitative estimate of the overall effect of a particular intervention or variable on a defined outcome; MA produces a stronger conclusion than can be provided by any individual study. See Cochran Collaboration, Cumulative meta-analysis.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

meta-analysis

An attempt to improve the reliability of the findings of medical research by combining and analyzing the results of all discoverable trials on the same subject. In crude terms the advantages are obvious: trials that find against a hypothesis will cancel out the effect of those that find for it. Pooling of raw data is not, however, without statistical hazard and it has become apparent that meta-analysis can introduce its own sources of inaccuracy. The method is currently undergoing refinement.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
Again, any meta-analyses played a minor role in these suggestions.
If meta-analyses are taken to be the units of science, and since meta-analyses can be expressed as scientific abstracts, is the concept of mapping science more than a rhetorical device?
In this paper we focus on a third potential source of variability among meta-analyses with the same objective, namely the way in which studies, and, in particular, data within studies, are selected for inclusion in the analysis.
(1992), and Arnqvist and Wooster (1995) stress the importance of independence of the data used in meta-analyses. The outcome of a meta-analysis can be biased if the results of one experiment are used more than once in a single meta-analysis or if multiple experiments reported in a single paper are not independent.
It is therefore important that health care planners and clinicians become proficient appraisers of the meta-analyses they will encounter with increasing frequency in the medical literature.
More recently, Polanin and colleagues reviewed 81 meta-analyses published in Review of Educational Research and Psychological Bulletin and found that effect sizes from published studies are, on average, 0.18 standard deviation units larger than those from unpublished sources.
000001, the summary random effects were significant in 35 meta-analyses 31 of these found increased risk with adiposity of esophageal adenocarcinoma, multiple myeloma, and cancers of the colon, rectum, liver, biliary tract system (cancers of gallbladder, extrahepatic bile duct, and ampulla of Vater), pancreas, postmenopausal breast, endometrium, and kidney.
In this tutorial article, the interpretation of the meta-analysis result for numerical and dichotomous outcomes were explained in a step-by-step manner to increase the critical appraise abilities of readers for meta-analyses. We believe that the paper will be very useful for understanding and performing meta-analysis.
In total, seven RCTs were included for qualitative synthesis, three of which were included in the previous meta-analyses and four of which were published afterwards, representing new data.
M2 EQUITYBITES-January 11, 2018-BioGaia's probiotic's effectiveness in infant colic confirmed in two new meta-analyses
M2 PHARMA-January 11, 2018-BioGaia's probiotic's effectiveness in infant colic confirmed in two new meta-analyses
Our literature search strategy, selection of publications, data extraction, and the reporting of results for the review were designed in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines [21].