Search our Plain Language Summaries of health evidence: Enter terms For more advanced searches, go to the Cochrane Library website. Our health evidence - how can it help you "Cochrane summarizes the findings so people making important decisions — you, your doctor, the people who write medical guidelines — can use unbiased information to make difficult choices without having to first read every study out there Each Cochrane Review addresses a clearly formulated question; for example:
Enter terms What is a systematic review? A systematic review summarises the results of available carefully designed healthcare studies controlled trials and provides a high level of evidence on the effectiveness of healthcare interventions.
Judgments may be made about the evidence and inform recommendations for healthcare. These reviews are complicated and depend largely on what clinical trials are available, how they were carried out the quality of the trials and the health outcomes that were measured.
Review authors pool numerical data about effects of the treatment through a process called meta-analyses. Then authors assess the evidence for any benefits or harms from those treatments. In this way, systematic reviews are able to summarise the existing clinical research on a topic.
The review plan Review authors set about their task very methodically following, step by step, an advance plan called a protocol. Cochrane protocols are published in the Cochrane Library so that people can provide comments to improve them before the actual review has been conducted.
The review question The purpose of the review is generally stated as: To assess the effects of [intervention or comparison] for [health problem] in [types of people, disease or problem], and healthcare setting if appropriate.
The included studies generally randomly assign participants to the intervention under investigation or the control or comparative intervention. The review title Titles of Cochrane reviews also have a set layout: Intervention for problem in a disease or population, and sometimes an outcome.
Surgical excision margins for primary cutaneous melanoma. This is a statement of the types of population participants in controlled clinical studiestypes of interventions and what they are compared to, even if it is no treatmentand the types of outcomes that are of interest. Cochrane Handbook for Systematic Reviews of Interventions at www.Cochrane, previously known as the Cochrane Collaboration, was founded in under the leadership of Iain Chalmers.
It was developed in response to Archie Cochrane's call for up-to-date, systematic reviews of all relevant randomized controlled trials of health care. How to write an introduction and methods of a systematic review of literature Table: Review of background/introduction part of systematic reviews published by Cochrane review from the list of top 50 most-accessed abstracts of systematic reviews in past 3 months.
Cochrane Reviews are internationally recognized as the highest standard in evidence-based health care and we publish them online in the Cochrane Library. We update Cochrane Reviews regularly to incorporate new research, so that you can base treatment decisions on .
The Cochrane Collaboration uses a writing tool—RevMan —to produce its reviews but disseminating the findings of the reviews within Wikipedia necessitates more work. Data have to be extracted, summarised and referenced in the clear and simple way required by Wikipedia.
Systematic reviews are a type of literature review that uses systematic methods to collect secondary data, critically appraise research studies, and synthesize studies. Systematic reviews formulate research questions that are broad or narrow in scope, and identify and synthesize studies that directly relate to the systematic review question.
The historical roots of meta-analysis can be traced back to 17th century studies of astronomy, while a paper published in by the statistician Karl Pearson in the British Medical Journal which collated data from several studies of typhoid inoculation is seen as the first time a meta-analytic approach was used to aggregate the outcomes .