This is an excellent starting place for clinicians who seek to read the literature critically.
CASP was initiated in 1993 in response to the need for developing skills in health care staff to meet the challenge of Evidence Based Medicine. The core CASP checklists (randomised controlled trial & systematic review) were based on JAMA ‘Users’ guides to the medical literature 1994 (adapted from Guyatt GH, Sackett DL, and Cook DJ), and piloted with health care practitioners. For each new checklist (e.g qualitative) a group of experts were assembled to develop and pilot the checklist and the workshop format with which it would be used. Over the years overall adjustments have been made to the format, but a recent survey of checklist users reiterated that the basic format continues to be useful and appropriate.