The evolution of assessing bias in Cochrane systematic reviews of interventions: celebrating methodological contributions of the Cochrane Collaboration

The evolution of assessing bias in Cochrane systematic reviews of interventions: celebrating methodological contributions of the Cochrane Collaboration

Background The global evidence base for health care is extensive, and expanding; with nearly 2 million articles published annually. One estimate suggests 75 trials and 11 systematic reviews are published daily [1]. Research syntheses, in a variety of established and emerging forms, are well recognised as essential tools for summarising evidence with accuracy and reliability [2]. Systematic revi...

The Cochrane Collaboration and systematic reviews.

Cochrane Handbook for Systematic Reviews of Interventions

s and other grey literature have been shown to be sources of approximately 10% of the studies referenced in Cochrane reviews (Mallett 2002). Over one-half of trials reported in conference abstract never reach full publication, and those that are eventually published in full have been shown to be systematically different than those that are never published in full (Scherer 2003). In addition, gr...

Cochrane Handbook for Systematic Reviews of Interventions

Chapter 1: Introduction .................................................. 2 Key points .......................................................... 2 1.1 Cochrane ........................................................ 3 1.1.1 What is Cochrane? ................................................. 3 1.1.2 A brief history of Cochrane ............................................ 4 1.1.3 Cochrane orga...

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...