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BMJ Evidence-Based Medicine (BMJ EBM) publishes original evidence-based research, insights and opinions on what matters for health care. We focus on the tools, methods, and concepts that are basic and ...

Correspondence to Dr Mohammad Hassan Murad, Evidence-Based Practice Center, Mayo Clinic, Rochester, MN 55905, USA; murad.mohammad{at}mayo.edu In 1904, Dr James Herrick evaluated a 20-year-old patient ...

Correspondence to Dr Mohammad H Murad, Evidence-based Practice Center, Mayo Clinic, Rochester, MN 55905, USA; murad.mohammad{at}mayo.edu Many guidelines use the term expert opinion in recommendations ...

A network meta-analysis combines the evidence from existing randomised trials about the comparative efficacy of multiple treatments. It allows direct and indirect evidence about each comparison to be ...

Although it is well established that cigarette smoking is associated with morbidity and mortality in several respiratory infections, data from recent studies suggest that active smokers are ...

Correspondence to Dr Kerry Dwan, Centre for Reviews and Dissemination, University of York, York, UK; Kerry.dwan{at}york.ac.uk A systematic review identifies, appraises and synthesises all the ...

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This paper is part of a series of methodological guidance from the Cochrane Rapid Reviews Methods Group. Rapid reviews (RR) use modified systematic review methods to accelerate the review process ...

Correspondence to Professor Glyn Elwyn, The Dartmouth Institute for Health Policy and Clinical Practice, Dartmouth College, Hanover, New Hampshire 03755, USA; glynelwyn{at}gmail.com Nevertheless we ...

In the current era of the COVID-19 pandemic, the world has never been more interested in the process of vaccine development. While researchers across the globe race to find an effective yet safe ...

Correspondence to Dr Jian-peng Huang, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China; hopis{at}sina.com Objectives To assess the relative ...