Abhaya (Emeritus Professor of Biostatistics, Delhi University College of Medical Sciences, Delhi, India) Indrayan & Rajeev Kumar (Department of Biostatistics and Medical Informatics, University College of Medical Sciences, Delhi, India) Malhotra 
Medical Biostatistics [PDF ebook] 

Encyclopedic in breadth, yet practical and concise, Medical Biostatistics, Fourth Edition focuses on the statistical aspects ofmedicine with a medical perspective, showing the utility of biostatistics as a tool to manage many medical uncertainties. This edition includes more topics in order to fill gaps in the previous edition. Various topics have been enlarged and modified as per the new understanding of the subject.