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Member Information
Sarah J. Ratcliffe, PhD
Assistant Professor of Biostatistics
Department of Biostatistics, Center for Clinicial Epidemiology and Biostatistics
Office Phone: 215-573-7398
Office Fax: 215-573-4865
Email: sratclif@mail.med.upenn.edu
Website: http://www.cceb.upenn.edu/main/people/ratcliffe.html
Education: Ph.D. 2001, Macquarie University , Australia
Keywords: Longitudinal data analysis, informative dropout, functional data analysis
Research and/or Clinical interests:
Dr. Ratcliffe's research is primarily in the areas of funtional data analysis (the analysis of complex curves) and models for longitudinal data in the presence of informative dropouts, particularly joint models for longitudinal and event time data. Her collaborative areas of interest include fetal and maternal medicine, reproductive health, and more recently, AIDS and cardiology.
Research Summary:
None given.
Representative Publications:
Ratcliffe S.J. , Leader L.R., and Heller G.Z. Functional data analysis with application to periodically stimulated fetal heart rate data: I. Functional regression. Statistics in Medicine. *21*: 1103-1114, 2002.
Ratcliffe S.J. , Heller G.Z., and Leader L.R. Functional data analysis with application to periodically stimulated fetal heart rate data: II. Functional logistic regression. Statistics in Medicine. *21*: 1115-1127, 2002.
Ten Have T.R., Ratcliffe S.J. , Reboussin B.A., Kunselman A. and Miller M.E. Deviations from the population-averaged versus subject-specific relationship for clustered binary data. Statistical Methods in Medical Research, *13*(1):3-16, 2004.
Ratcliffe S.J. , Guo G. and Ten Have T.R. Joint modeling of longitudinal and survival data via a common frailty. Biometrics, *60*(4): 892-899, 2004.
Guo W., Ratcliffe S.J. and Ten Have T.R. A Random pattern-mixture model for longitudinal data with dropouts. Journal of the American Statistical Association, *99*: 929-937, 2004.
Macones G.A., Peipert J., Nelson D.B., Odibo A., Stevens E.J., Stamilio D.M., Pare E., Elovitz M., Sciscione A., Sammel M.D., and Ratcliffe S.J. Maternal complications with vaginal birth after caesarean delivery: A multicenter study. American Journal of Obstetrics and Gynecology, *193*: 1656-1662, 2005.
Stringer M., Ratcliffe S. , and Gross R. Acceptance of Hepatitis B Vaccination by Pregnant Adolescents. MCN, The American Journal of Maternal Child Nursing, *31*(1): 54-60, 2005.
Floyd T.F., Ratcliffe S.J. , Detre J.A., Woo Y.J., Wang J.J., Acker M.A., Bavaria J.E., Resh B.F., Pochettino A.E., and Eckenhoff R.A. Integrity of the cerebral blood flow response to hyperoxia after cardiopulmonary bypass. Journal of Cardiothoracic and Vascular Anesthesia. (In press)
