Practical Statistics for Medical Research is a problem-based text for medical students, researchers, and others in medical areas who need to use statistics but have no special mathematics background. The author provides clear explanations to statistical concepts, emphasizing the practical aspects of the design and analysis of medical research. He gives special attention to the presentation and interpretation of results and the many real problems that arise frequently in medical research. The new edition includes more exercises and examples, a new section on meta-analysis, enhanced treatment of factorial trials, and sample size calculations for survival studies.