Meta Analysis Service
As one proceeds to the top from
every level of evidence in the evidence pyramid the evidence becomes less
biased as compared to previous level. Thus, Meta-analysis can be
regarded as the apex of healthcare evidence
At the bottom of the pyramid of evidence are studies with sufficient bias and as we move to the top the studies become more and more reliable with stark reduction in bias as the level of scrutiny and methods are highly reliable and scientific. Meta analysis is at the apex of it, as it is combines various scientific studies to provide an estimate of the true value (Haidich, 2010).
refers to the analysis of analyses" (Gene v. Glass, 1976)
The Need Of Performing Meta-Analysis:
Result of a single study is not sufficient to validate a hypothesis. Results vary for each study by a slight or heavy margin depending on the various conditions, study subjects and samples, and other confounding factors. Thus raises the need for synthesizing data across multiple studies. Meta-analysis uses statistical principles for this end.
The combination of different studies provides more
data which is advantageous in increasing precision and accuracy of the
statistical estimate. Even individual studies that are underpowered can be
improved by combining with a meta-analysis of similar studies. Thus
meta-analysis ensures improving statistical power in detecting a particular
Following are the basic steps involved in carrying out basic Meta-analysis (Field & Gillett, 2010)
1. Identification and formulation of the problem
2. Carry out a literature review.
Study and search for various databases that include different reviewed articles. Some commonly used platforms this purpose includes PubMed, Embase, Scopus, etc.
3. Define inclusion and selection criteria.
This process helps in identifying and selecting relevant evidence from studies for the problem statement.
4. Extracting Data.
Extract data from studies which are relevant for your purpose for combining in the final set of analysis.
5. Performing Meta-analysis.
Use one of the many software tools available to carry out meta-analysis. Software like Review manager and comprehensive meta-analysis provide a good analysis.
Learn More : Meta Analysis Writing Services
Article author : Pubrica
Article source name : John Wick, M.S., PhD.,
Source URL : http://pubrica.com/academy/2019/04/10/why-perform-a-meta-analysis-evidence-based-research/