TY - JOUR T1 - CLinical practice guidelines and scientific evidence AU - Antman EM, Gibbons RJ Y1 - 2009/07/08 N1 - 10.1001/jama.2009.912 JO - JAMA SP - 142 EP - 147 VL - 302 IS - 2 N2 - First, although an average of 50% of recommendations in ACC/AHA guidelines are based on evidence level C (expert consensus), the conclusion by Shaneyfelt and Centor that all of these recommendations reflect subjective bias was not justified. Many recommendations are based on sound clinical judgment that will never be tested in a clinical trial (eg, obtaining a 12-lead electrocardiogram in a patient presenting to the emergency department with chest pain). As part of the deliberate ACC/AHA guidelines review process, the work of the writing committee is typically critiqued by an additional 35 to 50 physician leaders.2 Thus, the final recommendations reflect the input from extensive peer review and are not simply the opinion of the writing committee members.2- 3 SN - 0098-7484 M3 - doi: 10.1001/jama.2009.912 UR - http://dx.doi.org/10.1001/jama.2009.912 ER -