meta-analysis

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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.

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.

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.

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.
References in periodicals archive ?
journal for Specialists in Group Work (JSGW) publication pattern review: A meta-study of author and article characteristics from 1981-2010.
meta-study provided only a description of article characteristics during the first 10 volumes and made no attempt to determine whether trends or directional changes were occurring.
The full meta-study, 'The behaviour of bioplastic films in mechanical recycling streams', can be accessed from European Bioplastics' website.
The JAMA meta-study is an ethically compromised drug analysis because it asks if an unapproved therapy approach yielded therapeutic good in the context of a disease.
In the first, "Honors Dissertation Abstracts: A Bounded Qualitative Meta-Study," Debra K.
(2010) is a meta-study. A recta-study, the procedure used in this article, consists of a quantitative review of publication patterns.
Pfizer expressed concern about the validity of the meta-study and stands behind Chantix' benefit/risk profile.
That point was brought home recently when a group of University of Michigan physician researchers examined the problem and published a meta-study of the issue, entitled "Systematic Review and Meta-Analysis: Reminder Systems to Reduce Catheter-Associated Urinary Tract infections and Urinary Catheter Use in Hospitalized Patients," along with co-authors Mary AM.
The most comprehensive economic meta-study shows that total future climate impacts would justify a tax of around E0.01 per liter of petrol ($0.06 per gallon in the United States) - an amount dwarfed by the taxes already imposed by most European countries.
Patterns of articles accepted for publication in Counselor Education and Supervision from the past 25 years were reviewed in this meta-study. Results were described and statistically analyzed to identify trends over time in author characteristics (sex, institutional classifications, employment setting, domicile) and article characteristics (article type, research design, sample, sample size, types of participants, and statistical procedures and sophistication).
Tangredi uses the same methodology as in his earlier work: that of a meta-study. He surveys future security environment literature published in the last decade by both government and nongovernment sources.
A bounded qualitative meta-study was used and the methods, theories, and findings of the dissertations were examined.