The ability to make a decision about whether to change practice based on the information given is a core skill for all doctors. To be able to do this quickly and efficiently is tested in all undergraduate and postgraduate medical examinations. This book is the essential resource for all those wanting to pass and excel in the critical appraisal section of their undergraduate and postgraduate medical examinations and will be a useful tool for all physicians who want a refresher on critical appraisal for revalidation.