Michael Hayden Rosenthal MD, PhD, Presenter: Nothing to Disclose

Atul Bhanudas Shinagare MD, Abstract Co-Author: Nothing to Disclose

Fiona Mary Fennessy MD, PhD, Abstract Co-Author: Nothing to Disclose

Katherine Margaret Krajewski MD, Abstract Co-Author: Research Grant, General Electric Company Spouse, Employee, Ironwood Pharmaceuticals, Inc

Nikhil H. Ramaiya MD, Abstract Co-Author: Nothing to Disclose

1. Basic biostatistics can be understandable and accessible when a few fundamental concepts are kept in mind. 2. Awareness of these basic concepts is critical to understanding the literature and publishing research, as illustrated through case examples. 3. A structured approach to describing the research question, characterizing the nature of the data, and performing a few preliminary tests can provide a clear understanding of which test to use in most situations.  

1. Overview of basic biostatistical concepts, including data types (binary, categorical, ordinal, and interval variables), normality, and basic statistical tests. 2. How to choose a statistical test – review of the key concepts (e.g. dependent and independent variables, parametric vs. nonparametric tests) that are seen on statistical testing guides. 3. Case examples of common statistical tests, including chi-squared tests for categorical variables, t-tests and Wilcoxon rank sum tests for grouped interval data, and Kappa for interreader agreement. 4. Case examples from our biostatistics curriculum demonstrating common pitfalls in choosing or interpreting statistical tests. 5. Knowing when and how to consult a biostatistician – key issues such as data transforms, repeated measures, interactions, and nonlinear effects that often warrant expert advice.  

http://abstract.rsna.org/uploads/2014/14019486/14019486_am35.pdf

Rosenthal, M, Shinagare, A, Fennessy, F, Krajewski, K, Ramaiya, N, Biostatistics for Radiologists: Top Ten Concepts That We Want to Know but Are Afraid To Ask.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14019486.html