Selection bias can, and does, occur, even in randomized clinical trials. Steps need to be taken in order to ensure that this does not compromise the integrity of clinical trials; hence "Selection Bias and Covariate Imbalances in Randomized Clinical Trials" offers a comprehensive treatment of the subject and the methodology involved. This book:

• Provides an overview of the hierarchy of study designs, and justifies the position of randomised trials at the top of this hierarchy.
• Discusses the strengths and defects of randomisation, and provides real evidence to justify concern...