Machine generated contents note: ch. 1 What is Meant by Evidence? / Amino Dilmohamed -- ch. 2 What are Sources of Evidence? / Mahwish Hayee -- ch. 3 Making Sense of the Evidential Hierarchy Used to Judge Research Evidence / Nena Foster -- ch. 4 The Act/Art of Assessing: Critical Appraisal and its Relevance in Public Health / Nena Foster -- ch. 5 Assessing Evidence - the Quality of Primary and Secondary Research / Mahwish Hayee -- ch. 6 Assessing Evidence - the Strengths and Weaknesses of Various Ways of Assessing Public Health Outcomes / Krishna Regmi -- ch. 7 Assessing Evidence - Cost-Effectiveness Analysis / Gary Ginsberg -- ch. 8 Principles and Methods of Programme Evaluation / Carmen Aceijas -- ch. 9 Assessing Quality and Effectiveness to Improve Public Health and Wellbeing / Krishna Regmi