In this paper, we show that classical survival analysis involving censored data can naturally be cast as a ranking problem. The concordance index (CI), which quantifies the quality of rankings, is the standard performance measure for model assessment in survival analysis. In contrast, the standard approach to learning the popular proportional hazard (PH) model is based on Cox’s partial likeliho...

The main purpose was to validate the use of outdoor-indoor volumetric impaction sampler with Hirst-type spore traps (HTSTs) to continuously monitor fungal load in order to prevent invasive fungal infections during major structural work in hospital settings. For 4 weeks, outdoor fungal loads were quantified continuously by 3 HTSTs. Indoor air was sampled by both HTST and viable impaction sampler...

BACKGROUND Little information is available on the use of chest computed tomography (CT) to predict breast tumor size in breast cancer, despite the fact that chest CT examinations are being increasingly used. The purpose of this study was to evaluate the value of chest CT for predicting breast tumor size using pathology measurements as reference standards. METHODS Tumor sizes (defined as great...

This appendix reviews and extends Cournot’s classic results, connecting them to the design of mechanisms for multilateral trade. Little in this section is “new”, as it largely seeks to unify the proofs of disparate results in the literature. However, we believe that this simple united treatment helps emphasize the connections among a variety of issues previously discussed in isolation and there...

In method comparison and reliability studies, it is often important to assess agreement between multiple measurements made by different methods, devices, laboratories, observers, or instruments. For continuous data, the concordance correlation coefficient (CCC) is a popular index for assessing agreement between multiple methods on the same subject where none of the methods is treated as referen...

BACKGROUND AND METHODS Formalin Fixed Paraffin Embedded (FFPE) samples represent a valuable resource for cancer research. However, the discovery and development of new cancer biomarkers often requires fresh frozen (FF) samples. Recently, the Whole Genome (WG) DASL (cDNA-mediated Annealing, Selection, extension and Ligation) assay was specifically developed to profile FFPE tissue. However, a tho...

Kendall’s coefficient of concordance is used traditionally in statistics for measuring agreement between k orderings (k > 2).A new measure of concordance which generalizes Kendall’s coefficient is proposed. The suggested coefficient could be used in situations with missing information or noncomparable outputs. © 2006 Elsevier B.V. All rights reserved.

We consider the Grope filtration of the classical knot concordance group that was introduced in a paper of Cochran, Orr and Teichner. Our main result is that successive quotients at each stage in this filtration have infinite rank. We also establish the analogous result for the Grope filtration of the concordance group of string links consisting of more than one component.

with health care instructions has come in for increasing criticism over the last 20 years. A recent, influential review of research in this area argued for a shift away from compliance to a more negotiated approach to the medical encounter, termed concordance.1 The concordance model views medical interactions as a potential opportunity for both parties to take part in decisions about treatment,...