Demand-driven evidence network in Europe.

Recent interest in “evidence-based policy-making” is a response to the perception that governments need to improve the quality of their decisionmaking in view of rapid changes and scarce resources.1 Creating better policies means using the best available evidence and not merely that which is the most easily accessible. In a world of information overload, there is a large amount of information that needs to be filtered. Producers and users of information may have different views of what constitutes evidence.2 The producers of scientific evidence are looking for results that can be assessed and are rigorous, comprehensive and generalizable; users are mainly interested in information and knowledge that are relevant, specific and fit for their purposes, concise and easy to understand. The challenge is how to balance all these views and expectations. It is important to make sure that evidence is accessible, as it would be unethical not to use it during the policy-making process.3 One way in which the WHO Regional Office for Europe ensures availability is through the Health Evidence Network (HEN). Six years ago, with the arrival of Dr Marc Danzon as WHO Regional Director for Europe, the Regional Office began focusing efforts and energies on matching services to the explicit needs of Member States. Although evidence is just one of many factors considered in the decision-making process , it was decided to take a novel approach in order to provide reliable evidence to inform policy-making: rather than build up a general evidence base, existing evidence is mobilized in response to specific questions, enabling HEN to respond to policy-makers’ concerns. The HEN approach starts and ends with European health policy-makers. This means both seeking their input on public health policy concerns and