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Ralitza Gueorguieva, PhD

Senior Research Scientist in Biostatistics; Director of Biostatistics in Psychiatry

Contact Information

Ralitza Gueorguieva, PhD

Office Location

Mailing Address

  • Biostatistics

    PO Box 208034, 60 College Street

    New Haven, CT, 06520-8034

    United States



Dr. Gueorguieva obtained her Ph.D. in Statistics from University of Florida in 1999 and has been a faculty member of the Department of Biostatistics at Yale University School of Public Health since 2000. Her research interests are in methodological development of models for longitudinal data and outcomes of different types, assessment of risk and the application of innovative statistical approaches for clinical trials data. She has developed statistical techniques for simultaneous analysis of repeatedly measured categorical and continuous outcomes, risk assessment screening algorithms, models for joint analysis of longitudinal and survival outcomes, and has applied trajectory-based approaches and recursive partitioning methods to the assessment of treatment effects. Dr. Gueorguieva is collaborating extensively with psychiatric researchers on clinical trials and observational studies in alcoholism, substance abuse, depression and anxiety disorders, women's behavioral health, schizophrenia, bipolar disorder, obsessive-compulsive disorder and posttraumatic stress disorder. She advocates the use of modern statistical methods such as mixed and mixture models, tree-based methods and nonparametric alternatives to address the complexity of psychiatric data.

Education & Training

  • PhD
    University of Florida (1999)
  • MSc
    University of Florida, Statistics (1996)
  • MSc
    Sofia University (1994)


  • Teaching Biostatistics to Students
    Sofia, Bulgaria 2013
    Dr. Gueorguieva taught a course in biostatistics for participants in the M.Sc. program in Probability Theory and Mathematical Statistics and provided mentorship to students at Sofia University.
  • Family Association Study of Neurocognitive Impairment in Patients with Bipolar Disorder
    Sofia, Bulgaria 2009
    Dr. Gueorguieva provided statistical consultations to the project team.
  • UNICEF Early Child Development Project
    Bulgaria 2008
    Dr. Gueorguieva provided guidance on statistical analyses to the national team of the Child Nutrition, Rearing and Parenting Practices study in Bulgaria.
  • Research and Teaching
    Sofia, Bulgaria 2008
    As an affiliated member of the Section of Probability Theory and Mathematical Statistics, Dr. Gueorguieva has taught training courses, participated in seminars and research projects with Bulgarian scientists.

Honors & Recognition

AwardAwarding OrganizationDate
Certificate of Appreciation for dedicated service and valuable contributions as one of the Top 10 Reviewers for Biological Psychiatry in 2011.Biological Psychiatry2012
Certificate of Appreciation for dedicated service and valuable contributions as one of the Top 10 Reviewers for Biological Psychiatry in 2007Biological Psychiatry2008
International Biometric Society's Eastern North American Region (ENAR) Student Award1999
First place, Student Abstract Competition, Annual Florida Epidemiology Meeting1998
R. L. Anderson Student Paper Award, Southern Regional Conference on Statistics1998
The Statistics Faculty Award for the Outstanding Senior Graduate Student, Department of Statistics, University of FloridaUniversity of Florida1998

Professional Service

National Science FoundationReviewer2009
International Program Committee for the International Biometrics Society ConferenceMember2007 - 2008
Biological PsychiatryEditorial Board Member2007 - Present
Journal of the Royal Statistical Society, Series AEditorial Board Member2007 - 2010
Biometrics Section of the American Statistical AssociationPublication Officer2007 - 2008
The Netherlands Organisation of Health Research and Development, Prevention ProgrammeReviewer2006
Liaison Committee for combined BA/BS-MPH degree programMember2005 - 2006
Admissions Committee for MPH programMember2005 - 2006
NIMHAd-hoc Member, Special Emphasis Panels2004 - Present

Departments & Organizations