We introduce the series of 7 tutorial papers on evidence synthesis methods for decision
making, based on the Technical Support Documents in Evidence Synthesis prepared for the
National Institute for Health and Clinical Excellence (NICE) Decision Support Unit.
Although oriented to NICE’s Technology Appraisal process, which examines new
pharmaceutical products in a cost-effectiveness framework, the methods presented
throughout the tutorials are equally relevant to clinical guideline development and to
comparisons between medical devices, or public health interventions. Detailed guidance is
given on how to use the other tutorials in the series, which propose a single evidence
synthesis framework that covers fixed and random effects models, pairwise meta-analysis,
indirect comparisons, and network meta-analysis, and where outcomes expressed in several
different reporting formats can be analyzed without recourse to normal approximations. We
describe the principles of evidence synthesis required by the 2008 revision of the NICE
Guide to the Methods of Technology Appraisal and explain how the approach proposed in
these tutorials was designed to conform to those requirements. We finish with some
suggestions on how to present the evidence, the synthesis methods, and the results.