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
Philadelphia, PA 19104-6021
Office: 2155737398
Fax: 2155734865
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: 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: [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.

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, and Kirpalani H: Sustained Aeration of Infant Lungs (SAIL) Trial: Study protocol for a randomized controlled trial. Trials 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): 1019-26, Mar 2015.

Liu C, Ratcliffe SJ, and Guo W: A random pattern mixture model for ordinal outcomes with informative dropouts. Statistics in Medicine 34(16): 2391-402, Apr 2015.

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Last updated: 09/18/2015
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