This practical workbook combines the authors? expertise with published papers from the BMJ as examples. The exercises are for individual or group self–learning and cover all aspects of evidence based problem solving. The different units include: randomised controlled trials of therapy numbers needed to treat, odds ratios, and confidence intervals cohort studies diagnostic or screening tests systematic reviews and meta–analyses qualitative research case control studies Devised and written by two internationally renowned teachers of evidence based health care, this book will be an invaluable learning resource for all teachers and would be practitioners of evidence based healthcare.