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To formulate health care policies and practices that take into account the results of robust research, there must be easy access to high-quality, reliable summaries of the research evidence. Systematic reviews of this evidence provide less biased and more informative summaries than do traditional ad hoc reviews (1). In 1992, the Universities of Leeds and York in the United Kingdom were commissioned by the Management Executive of the United Kingdom National Health Service (NHS) to produce reliable information about the effectiveness and cost-effectiveness of health care interventions to help health authorities make more informed purchasing decisions. This EBM note describes the NHS Centre for Reviews and Dissemination (CRD) and introduces the Effective Health Care bulletin series, one of which is summarised on page 169.
T. Sheldon (Tue,) studied this question.