Health impact assessment: the state of the art

Health impact assessment (HIA) has matured as a form of impact assessment over the past two decades. The use of HIA methods and approaches has expanded rapidly, and it now has applications in both the public and private sectors and in an increasing number of countries around the world. This paper presents an overview of the historical and recent international developments in HIA, before detailing the existing strengths, weaknesses, opportunities and threats to practice. It draws upon the HIA literature, five workshops on 'Current issues in HIA practice' held at International Association for Impact Assessment (IAIA) conferences between 2006 and 2011, and the experience of the authors.