Sarah Jane Ratcliffe, Ph.D.

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Associate Professor of Biostatistics in Biostatistics and Epidemiology at the Hospital of the University of Pennsylvania
Department: Biostatistics and Epidemiology
Graduate Group Affiliations

Contact information
Dept. of Biostatistics & Epidemiology
Univ. of Pennsylvania Perelman School of Medicine
610 Blockley Hall, 423 Guardian Drive
Philadelphia, PA 19104-6021
Office: 215-573-7398
Fax: 215-573-4865
B.Sc(Hons) (Mathematics)
University of Technology, Sydney, Australia, 1996.
Ph.D. (Statistics)
Macquarie University, Sydney, Australia, 2000.
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Description of Research Expertise


Selected Publications

Ratcliffe SJ, Heller GZ, and Leader LR.: Functional data analysis with application to periodically stimulated fetal heart rate data. II: Functional logistic regression. Statistics in Medicine 21(8): 1115-27, 2002.

Guo W, Ratcliffe SJ, and Ten Have TR.: A Random pattern-mixture model for longitudinal data with dropouts. Journal of the American Statistical Association 99: 929-37, 2004.

Ratcliffe SJ, Guo W,. and Ten Have TR.: Joint modeling of longitudinal and survival data via a common frailty. Biometrics 60(4): 892-9, 2004.

Ratcliffe SJ and Shults J: GEEQBOX: A Matlab toolbox for generalized estimating equations and quasi-least squares. Journal of Statistical Software 25(14): 1-14, 2008 Notes:

Shults J, and Ratcliffe SJ: Analysis of multi-level correlated data in the framework of generalized estimating equations via xtmultcorr procedures in Stata and qls functions in Matlab. Statistics and its Interface 2: 187-96, 2009.

Elmi A, Ratcliffe SJ, Parry S and Guo W: A B-spline based semiparametric nonlinear mixed effects model. Journal of Computational and Graphical Statistics 20(2): 492-509, 2011 Notes: First author is Dr. Ratcliffe's PhD student. [Epub 2011 Mar 23] DOI:10.1198/jcgs.2010.09001.

Brown SES, Ratcliffe SJ, and Halpern SD.: An empirical comparison of key statistical attributes among potential intensive care unit quality indicators. Critical Care Medicine 42(8): 1821-31, 2014 Notes: First author is Dr. Ratcliffe's PhD student.

Foglia EE, Owen LS, Thio M, Ratcliffe SJ, Lista G, te Pas A, Hummler H, Nadkarni V, Ades A, Posencheg M, Keszler M, Davis P, Kirpalani H: Sustained Aeration of Infant Lungs (SAIL) Trial: Study protocol for a randomized controlled trial. Trials 16: 95, March 2015.

Hart JL, Harhay MO, Gabler NB, Ratcliffe SJ, Quill CM and Halpern SD: Variability among United States intensive care units in managing patients admitted with pre-existing limits on life-sustaining therapies. JAMA Internal Medicine 175(6): 1019-1026, June 2015.

Liu C, Ratcliffe SJ, Guo W: A random pattern mixture model for ordinal outcomes with informative dropouts. Statistics in Medicine 34(16): 2391-2402, July 2015 Notes: Epub 2015 Apr 20.

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Last updated: 06/30/2016
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