The previous edition of this useful text on epidemiologic methods for studying injuries and evaluating interventions to prevent them provides specific objectives for research in the various stages of injury control planning and implementation, including the types of data needed to reach the objectives. Using a progressive, step-by-step analysis, it illustrates how to pose research questions and design the best research studies to answer those questions. This new edition will update all chapters and include new examples of studies. The chapters will also be organized into more precise topic areas for ease of reference. The chapter on policy analysis would be dissolved and topic treated as part of other chapters.