Medical Statistics: A Commonsense Approach, fourth edition provides students and practitioners with a clear, readable introduction to the statistics they will come across in their regular reading of clinical papers.?? References to real examples and published papers are used throughout as part of the teaching element of the book.? The book would mainly be for users of research rather than doers of research. The book and revised chapters will retain its use as part of a teaching course on medical statistics.?? The 3rd edition of the book was published in 1999: it is now revised and updated with new examples and layout to attract a broader readership. All references, examples and graphs are updated to include examples that are more relevant and understandable to a general medical audience rather that just medical students.