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This book presents a system of critical appraisal applicable to clinical, epidemiological and public health studies and to many other fields. It assumes no prior knowledge. The methods are relevant to students, practitioners and policymakers. The book shows how to assess if the results of one study or of many studies show a causal effect. The book discusses study designs: randomised and non-randomised trials, cohort studies, case-control studies, and surveys, showing the presentation of results including person-time and survival analysis, and issues in the selection of subjects. The system shows how to describe a study, how to detect and assess selection biases, observation bias, confounding, and chance variation, and how to assess internal validity and external validity (generalisability). Statistical methods are presented assuming no previous knowledge, and showing applications to each study design. Positive features of causation including strength, dose-response, and consistency are discussed. The book shows how to do systematic reviews and meta-analyses, and discusses publication bias. Systems of assessing all evidence are shown, leading to a general method of critical appraisal based on 20 key questions in five groups, which can be applied to any type of study or any topic. Six chapters show the application of this method to randomised trials, prospective and retrospective cohort studies, and case-control studies. An appendix summarises key statistical methods, each with a worked example. Each main chapter has self-test questions, with answers provided.Less

Essentials of Environmental Epidemiology for Health Protection guides front-line public health practitioners through the decisions they are likely to face when dealing with environmental health problems, and shows how to integrate relevant aspects of environmental science, communication sciences, toxicology, and environmental epidemiology skills to conduct initial investigations.Less

The Tropical Medicine Notebook provides a concise overview of the key topics in tropical medicine using short notes, diagrams, maps, and tables. The book is divided into eight sections. The first five cover infections caused by bacteria, viruses, fungi, protozoa, and helminths. The following three present the topics of vector biology, disease syndromes, and envenomation. A final section listing relevant guidelines, publications, and other resources guides the reader to more detailed information when required.Less