One of the first books on the topic, Adaptive Design Methods Clinical Trials presents the principles and methodologies in adaptive design and analysis that pertain to adaptations made to trial or statistical procedures based on accrued data of ongoing clinical trials. The book also offers a well-balanced summary of current regulatory perspectives, recently developed statistical methods, and practical guidelines for choosing an optimal design. Providing a broad range of adaptive design methods that use both analytical and simulation approaches, this resource fills the need for a unified, comprehensive, and updated book in the clinical research and development of adaptive design and analysis.