Library of Congress Cataloging-in-Publication Data Gordis, Leon Epidemiology / Leon Gordis.—4th ed. p.; cm. Includes bibliographical references and index. Leon Gordis June SECTION 1 The Epidemiologic Approach to Disease . 3, December 29, santmingbaliphi.ga Epidemiology / Leon Gordis. Epidemiology is the basic science of disease prevention and plays .. santmingbaliphi.ga .
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From the Department of Epidemiology at Johns Hopkins University and continuing in the tradition of award-winning educator and. Epidemiology, by award-winning educator and epidemiologist Leon Gordis, is a best-selling introduction to this complex science. Dr. Gordis leverages his vast. Epidemiology 5th Edition by Leon Gordis - PDF Version.
Biostatistics For Dummies. Medical Statistics Made Easy. Editorial Reviews Review "This is best introductory textbook of epidemiology that I have encountered. It is also ranked the highest by my students. The major change from the fourth to fifth edition is the addition of more color to the tables and figures.
The overall content has not changed much. Thus, for students who prefer a more colorful presentation, this edition is a worthwhile investment.
If this is not the case and students have the previous edition, they can still learn the principles and methods of epidemiology from the prior edition. Product details File Size: Up to 4 simultaneous devices, per publisher limits Publisher: Saunders; 5 edition November 14, Publication Date: November 14, Sold by: English ASIN: Enabled X-Ray: Not Enabled.
Share your thoughts with other customers. Write a customer review. Read reviews that mention student consult public health easy to read online access brand new epidemiology course even though easy to understand makes simple end of each chapter introduction to epidemiology questions at the end great textbook practice questions read and comprehend graduate epidemiology text however book for basics on epi great textbook best book.
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There was a problem filtering reviews right now. Please try again later. Paperback Verified download. I find the concepts to be fairly well explained, and the content interesting enough, at least more so than my Nursing Theory class, but the layout made it intolerable to read. To quote a fellow reviewer who shared my sentiments: When you are trying to read AND comprehend the information, you shouldn't have to go forward 4 pages to find the related table or back 5 pages to find the related figure.
The examples are extremely confusing, and I was left wondering where the numbers to calculate came from. I have learned the basics of epi before I used this book.
I chose this book for review purpose. I like that the book is well-structured, and explains key concepts very thoroughly. More content should be added for sampling. The questions at the end of each chapter were occasionally worded in a very vague manner. For example, Page Question 4 used the term "similar population", which is very ambiguous.
Similar in baseline characteristics sex, gender, race or disease prevalence or both? That ambiguity affects the results of the question. There are more examples in the exercise questions that share the problem of wording.
This is a subject that could easily This is a really great textbook.
This is a subject that could easily be very dry, but the author writes in a clear, engaging, non-patronizing manner that made it actually pleasurable to read. The author included humor and a great multitude of real-life examples to bring home the point- to help you, a non-epidemiologist, understand well.
I'm a graduate nursing student with undergraduate degrees in both biology and nursing, and never felt the need to write a textbook review before. Teachers and professors, please consider this textbook for your classes!
Great condition as described by seller! Anesthesia Nursing: Assisting Nursing: Basic Science Nursing: Cardiovascular Care Nursing: Care Planning Nursing: Critical Care Nursing: Dictionaries Nursing: Emergency Nursing: Forensic Mental Health Nursing: Foundation Textbooks Nursing: Gastrointestinal System Nursing: Gerontology Nursing: Health Promotion Nursing: Learning Disabilities Nursing: Maths Nursing: Medical Surgical - Advanced Prac Nursing: Oncology Nursing: Paediatric Nursing: Pharmacology Nursing: Psychology Nursing: Review Nursing: Social Work Nursing: Anaesthesiology, Chemotherapy Vet: Anatomy, Cytology, Histology Vet: There are two basic ways to reduce random error in an epidemiological study.
The first is to increase the sample size of the study.
In other words, add more subjects to your study. The second is to reduce the variability in measurement in the study. This might be accomplished by using a more precise measuring device or by increasing the number of measurements. Note, that if sample size or number of measurements are increased, or a more precise measuring tool is downloadd, the costs of the study are usually increased. There is usually an uneasy balance between the need for adequate precision and the practical issue of study cost.
Systematic error[ edit ] A systematic error or bias occurs when there is a difference between the true value in the population and the observed value in the study from any cause other than sampling variability. An example of systematic error is if, unknown to you, the pulse oximeter you are using is set incorrectly and adds two points to the true value each time a measurement is taken. The measuring device could be precise but not accurate.
Because the error happens in every instance, it is systematic. Conclusions you draw based on that data will still be incorrect. But the error can be reproduced in the future e.
A mistake in coding that affects all responses for that particular question is another example of a systematic error. The validity of a study is dependent on the degree of systematic error.
Validity is usually separated into two components: Internal validity is dependent on the amount of error in measurements, including exposure, disease, and the associations between these variables.
Good internal validity implies a lack of error in measurement and suggests that inferences may be drawn at least as they pertain to the subjects under study. External validity pertains to the process of generalizing the findings of the study to the population from which the sample was drawn or even beyond that population to a more universal statement.
This requires an understanding of which conditions are relevant or irrelevant to the generalization. Internal validity is clearly a prerequisite for external validity. Selection bias[ edit ] Selection bias occurs when study subjects are selected or become part of the study as a result of a third, unmeasured variable which is associated with both the exposure and outcome of interest.
Sackett D cites the example of Seltzer et al. Information bias[ edit ] Information bias is bias arising from systematic error in the assessment of a variable. Confounding[ edit ] Confounding has traditionally been defined as bias arising from the co-occurrence or mixing of effects of extraneous factors, referred to as confounders, with the main effect s of interest. The counterfactual or unobserved risk RA0 corresponds to the risk which would have been observed if these same individuals had been unexposed i.