Systems for grading the quality of evidence and the strength of recommendations I: Critical appraisal of existing approaches The GRADE Working Group

• Main Authors: Schünemann Holger (Author), Phillips Bob (Author), Oxman Andrew D (Author), O'Connell Dianne (Author), Liberati Alessandro (Author), Hill Suzanne (Author), Henry David (Author), Guyatt Gordon H (Author), Flottorp Signe (Author), Eccles Martin (Author), Atkins David (Author), Edejer Tessa (Author), Vist Gunn E (Author), Williams John W (Author)
• Format: Book
• Published: BMC, 2004-12-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

<p>Abstract</p> <p>Background</p> <p>A number of approaches have been used to grade levels of evidence and the strength of recommendations. The use of many different approaches detracts from one of the main reasons for having explicit approaches: to concisely characteri...