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While regression models have become standard tools in medical research, understanding how to properly apply the models and interpret the results is often challenging for beginners. Regression Models as a Tool in Medical Research presents the fundamental concepts and important aspects of regression models most commonly used in medical research, including the classical regression model for continuous outcomes, the logistic regression model for binary outcomes, and the Cox proportional hazards model for survival data. The text emphasizes adequate use, correct interpretation of results, appropriate presentation of results, and avoidance of potential pitfalls. After reviewing popular models and b...
In many areas of science a basic task is to assess the influence of several factors on a quantity of interest. If this quantity is binary logistic, regression models provide a powerful tool for this purpose. This monograph presents an account of the use of logistic regression in the case where missing values in the variables prevent the use of standard techniques. Such situations occur frequently across a wide range of statistical applications. The emphasis of this book is on methods related to the classical maximum likelihood principle. The author reviews the essentials of logistic regression and discusses the variety of mechanisms which might cause missing values while the rest of the book covers the methods which may be used to deal with missing values and their effectiveness. Researchers across a range of disciplines and graduate students in statistics and biostatistics will find this a readable account of this.
While regression models have become standard tools in medical research, understanding how to properly apply the models and interpret the results is often challenging for beginners. This text presents the fundamental concepts and important aspects of regression models most commonly used in medical research, including the classical regression model for continuous outcomes, the logistic regression model for binary outcomes, and the Cox proportional hazards model for survival data. The author emphasizes adequate use, correct interpretation of results, appropriate presentation of results, and avoidance of potential pitfalls.
Network research has recently been adopted as one of the tools of the trade in archaeology, used to study a wide range of topics: interactions between island communities, movements through urban spaces, visibility in past landscapes, material culture similarity, exchange, and much more. This Handbook is the first authoritative reference work for archaeological network research, featuring current topical trends and covering the archaeological application of network methods and theories. This is elaborately demonstrated through substantive topics and case studies drawn from a breadth of periods and cultures in world archaeology. It highlights and further develops the unique contributions made by archaeological research to network science, especially concerning the development of spatial and material culture network methods and approaches to studying long-term network change. This is the go-to resource for students and scholars wishing to explore how network science can be applied in archaeology through an up-to-date overview of the field.
Bioarchaeological Documentation and Cultural Understanding
The "raison d'etre" of hierarchical dustering theory stems from one basic phe nomenon: This is the notorious non-transitivity of similarity relations. In spite of the fact that very often two objects may be quite similar to a third without being that similar to each other, one still wants to dassify objects according to their similarity. This should be achieved by grouping them into a hierarchy of non-overlapping dusters such that any two objects in ~ne duster appear to be more related to each other than they are to objects outside this duster. In everyday life, as well as in essentially every field of scientific investigation, there is an urge to reduce complexity by recognizing and establishing reasonable das sification schemes. Unfortunately, this is counterbalanced by the experience of seemingly unavoidable deadlocks caused by the existence of sequences of objects, each comparatively similar to the next, but the last rather different from the first.
In this first book-length treatment of MELF, the authors assert that MELF represents an important contribution to our understanding of English as a Lingua Franca (ELF), in that existing ELF research has been limited to relatively low stakes communicative situations, such as interactions in business, academia, internet blogging or casual conversations. Medical contexts, in contrast, often represent situations calling for exceptional communicative precision and urgency. Providing both evidence from their own research and analysis from (the limited number of) existing studies, the authors offer a counterpoint to the optimism regarding communicative success prevalent in ELF. The book proposes a theoretical perspective on how the various features of healthcare communication serve as important variables in shaping interaction among speakers of ELF, further enlarging our understanding of this emerging sub-field.
The pursuit of gender in the archaeological record is explored in this exciting new collection of essays by renowned archaeologists and gender theorists. These essays place gender in the context of the past, by approaching the data in light of the previous decades of gender research. Issues such as tool-making, hunting, and evolution take on new meaning as the contributors examine the impact of gender worldwide. They do so in terms of the theories, methods, and ways of teaching and learning amassed through archaeological data. These essays provide insight into the study of gender in archaeology and will prove valuable to the scholarship of gender-based theory.
It is estimated that in prehistoric societies children comprised at least forty to sixty-five percent of the population, yet by default, our ancestral landscapes are peopled by adults who hunt, gather, fish, knap tools and make art. But these adults were also parents, grandparents, aunts and uncles (however they would have codified these kin relationships) who had to make space physically, emotionally, intellectually, and cognitively for the infants, children and adolescents around them. The economic, social, and political roles of Paleolithic children are often understudied because they are assumed to be unknowable or negligible. Drawing on the most recent data from the cognitive sciences a...
This book constitutes the refereed proceedings of the Third International Symposium on Bioinformatics Research and Applications, ISBRA 2007, held in Atlanta, GA, USA in May 2007. The 55 revised full papers presented together with three invited talks cover a wide range of topics, including clustering and classification, gene expression analysis, gene networks, genome analysis, motif finding, pathways, protein structure prediction, protein domain interactions, phylogenetics, and software tools.