Publications A Nonparametric Approach to Confidence Intervals for Concordance Index and Difference Between Correlated Indices Citation Guangyong Zou, Emma Smith, Vipul Jairath. A nonparametric approach to confidence intervals for concordance index and difference between correlated indices. J Biopharm Stat . 2022 Feb 25;1-28. doi: 10.1080/10543406.2022.2030747. Online ahead of print. PMID: 35216545 DOI: 10.1080/10543406.2022.2030747. Abstract Concordance refers to the probability that subjects with high values on one variable also have high values on another variable. This index has wide application in practice, as a measure of effect size in group-comparison studies, an index of accuracy in diagnostic studies, and a discrimination index for prediction models. Herein, we provide a unified framework for statistical inference involving concordance indices for standard variables of binary, ordinal, and continuous types. Tags Diagnostic accuracy, effect size, responsiveness Read More