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Elizabeth R. DeLong
Researcher at Duke University
Publications - 179
Citations - 35128
Elizabeth R. DeLong is an academic researcher from Duke University. The author has contributed to research in topics: Coronary artery disease & Population. The author has an hindex of 65, co-authored 179 publications receiving 31321 citations. Previous affiliations of Elizabeth R. DeLong include American College of Physicians & Quintiles.
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Journal ArticleDOI
Comparing the areas under two or more correlated receiver operating characteristic curves: a nonparametric approach.
TL;DR: A nonparametric approach to the analysis of areas under correlated ROC curves is presented, by using the theory on generalized U-statistics to generate an estimated covariance matrix.
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The Society of Thoracic Surgeons 2008 cardiac surgery risk models: part 1--coronary artery bypass grafting surgery.
David M. Shahian,Sean M. O'Brien,Giovanni Filardo,Victor A. Ferraris,Constance K. Haan,Jeffrey B. Rich,Sharon-Lise T. Normand,Elizabeth R. DeLong,Cynthia M. Shewan,Rachel S. Dokholyan,Eric D. Peterson,Fred H. Edwards,Richard P. Anderson +12 more
TL;DR: New STS risk models have been developed for CABG mortality and eight other endpoints and overall model performance is excellent, with acceptable calibration in the overall population and in numerous subgroups.
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The Society of Thoracic Surgeons 2008 cardiac surgery risk models: part 2--isolated valve surgery.
Sean M. O'Brien,David M. Shahian,Giovanni Filardo,Victor A. Ferraris,Constance K. Haan,Jeffrey B. Rich,Sharon-Lise T. Normand,Elizabeth R. DeLong,Cynthia M. Shewan,Rachel S. Dokholyan,Eric D. Peterson,Fred H. Edwards,Richard P. Anderson +12 more
TL;DR: New valve surgery models using contemporary data that include both valve repair as well as replacement are developed, expanding upon existing valve models, and include several nonfatal complications in addition to mortality.
Journal ArticleDOI
Association between hospital process performance and outcomes among patients with acute coronary syndromes.
Eric D. Peterson,Matthew T. Roe,Jyotsna Mulgund,Elizabeth R. DeLong,Barbara L. Lytle,Ralph G. Brindis,Sidney C. Smith,Charles V. Pollack,L. Kristin Newby,Robert A. Harrington,W. Brian Gibler,E. Magnus Ohman +11 more
TL;DR: A significant association between care process and outcomes was found, supporting the use of broad, guideline-based performance metrics as a means of assessing and helping improve hospital quality.
Journal ArticleDOI
Discordance of Databases Designed for Claims Payment versus Clinical Information Systems: Implications for Outcomes Research
James G. Jollis,Marek Ancukiewicz,Elizabeth R. DeLong,David B. Pryor,Lawrence H. Muhlbaier,Daniel B. Mark +5 more
TL;DR: This study examined the suitability of billing data compared with clinical data (prospectively collected for cardiology research and patient care) for use in clinical outcomes research and found that billing data is limited by the unstructured way in which they are collected.