This book is intended to help decision-makers use, assess and appraise the evidence that underpins decisions about the use of therapeutic interventions. It will inform decision-makers about the nature of evidence, the strengths and weaknesses of the available approaches, and how these can be most effectively distilled for the purpose of reaching reliable conclusions. It aims to encourage decision-makers to base their judgements about the use of therapeutic interventions on an informed appraisal of the totality of the evidence base. Is it reliable? Is it generalisable beyond the context of the...