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Scientist doing analysis on computer

Biostatistics is the application of statistical techniques for scientific research in health-related fields, including medicine, biology and public health. It also encompasses development of novel methodologies that translate to better study design and analyses.

Biostatistics also contributes substantially to the area of Data Science through statistical learning techniques. Since the beginning of the 20th century, the field of biostatistics has become an indispensable tool in improving health and reducing illness. Epidemiology is concerned with the distribution, causation, and control of disease across time and space in human populations.

The Mission of the Division of Biostatistics is to:

  • Provide quality statistical support in research design and analysis developed by the clinical and laboratory investigators.
  • Train medical students, graduate students, postdoctoral fellows and other research staff in the use of statistical methods and software.
  • Train the next generation of biostatisticians and data scientists.
  • Develop innovative statistical research guided by and benefiting clinical and laboratory based research projects.
  • Create and/or assist with epidemiologic studies in the fields of hypertension, women's health, perioperative outcomes and anesthesia.

The division was formed in October 2004, under the Medical College’s Strategic Plan for further development and retention of research scholars by fostering collaborations with biostatisticians and epidemiologists to further enhance and advance WCM research.

Affiliated Education Program

Biostatistics & Data Science Master's Track

Current Research Highlights

Factors Associated With Lymphedema in Women With Node-Positive Breast Cancer Treated With Neoadjuvant Chemotherapy and Axillary Dissection

July 19, 2019

Study in JAMA Surgery investigate factors associated with breast cancer-related lymphedema following neoadjuvant chemotherapy and axillary dissection. Read more here

Scientific Breakthroughs

Population Health Sciences 402 E. 67th St. New York, NY 10065 Phone: (646) 962-8078

Faculty & Staff

Headshot of Anjile An
Anjile An
  • Programmer Analyst II
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Headshot of Gulce Askin
Gulce Askin , MPH
  • Research Biostatistician III
(646) 962-8025
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Karla Ballman, Ph.D.
Karla Ballman , Ph.D.
  • Vice Chair for Education
  • Chief of the Division of Biostatistics
  • Professor of Population Health Sciences
(646) 962-8023
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Samprit Banerjee, Ph.D., MStat
Samprit Banerjee , Ph.D., MStat
  • Program Director of the M.S. in Biostatistics and Data Science
  • Associate Professor of Population Health Sciences
(646) 962-8014
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Zhengming Chen , Ph.D., MPH
  • Assistant Professor of Population Health Sciences
(646) 962-8015
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Paul Christos, DrPH, MS
Paul Christos , Dr.P.H., M.S.
  • Associate Research Professor of Population Health Sciences
  • Director of Biostatistics and Epidemiology Consulting Service
  • Director of Research Design and Biostatistics Core of the Weill Cornell Clinical and Translational Science Center
(646) 962-8018
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Jason Chua
  • Programmer Analyst I
Headshot of Victoria Cooley
Victoria Cooley , M.S.
  • Research Biostatistician I
(646) 962-8008
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 Debra D'Angelo, MS
Debra D'Angelo
  • Research Biostatistician Manager
(646) 962-3091
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Photo of Ivan Diaz
Ivan Diaz , Ph.D.
  • Assistant Professor of Population Health Sciences
(646) 962-8062
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Lewis Drusin, M.D., MPH
Lewis Drusin , M.D., MPH
  • Professor of Clinical Medicine
  • Professor of Clinical Population Health Sciences
  • Attending Physician
  • Director, Student Faculty Mentor Program
(212) 746-1757
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Imaani Easthausen
  • Research Biostatistician I
(646) 962-8069
Linda Gerber, Ph.D., MA
Linda Gerber , Ph.D., M.A.
  • Professor of Population Health Sciences
  • Professor of Epidemiology in Medicine
(646) 962-8020
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Kaylee Ho , M.S.
  • Research Biostatistician I
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Headshot of Katherine Hoffman
Katherine Hoffman , M.S.
  • Research Biostatistician I
(646) 962-8032
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Jihui Lee , Ph.D., M.S.
  • Postdoctoral Associate of Population Health Sciences
(646) 962-8138
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Yao Lu, MS
Yao Lu
  • Research Biostatistician III
(646) 962-8033
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Headshot of Xiaoyue Ma
Xiaoyue Ma , M.Sc.
  • Research Biostatistician III
(646) 962-8029
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Elizabeth Mauer, MS
Elizabeth Mauer , M.S.
  • Research Biostatistician III
(646) 962-8026
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Eshani Pareek
  • Healthcare Data Specialist
 Arindam RoyChoudhury, Ph.D., M.Stat.
Arindam RoyChoudhury , Ph.D.
  • Associate Professor of Population Health Sciences
(646) 962-8155
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Oleksandr Savenkov , Ph.D.
  • Assistant Professor of Population Health Sciences
(646) 962-7639
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Photo of Elizabeth Sweeney
Elizabeth Sweeney , Ph.D.
  • Assistant Professor of Population Health Sciences
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Headshot of Charlene Thomas
Charlene Thomas , M.S.
  • Research Biostatistician I
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Nicholas Williams , MPH
  • Research Biostatistician I
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Headshot of Alan Wu
Alan Wu , M.S.
  • Research Biostatistician I
(646) 962-7592
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Headshot of Xian Wu
Xian Wu , MPH
  • Research Biostatistician III
(646) 962-8016
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Headshot of Yiyuan Wu
Yiyuan Wu , M.S.
  • Research Biostatistician III
(646) 962-8073
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Wenna Xi
  • Postdoctoral Associate in Population Health Sciences
Hongzhe Zhang
  • Research Assistant
Kathy (Xi) Zhou, Ph.D., MS
Xi Kathy Zhou , Ph.D., M.S.
  • Associate Professor of Biostatistics of Population Health Sciences
(646) 962-8027
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Recent Faculty Publications

S. Al-Hajj; C.El Bcheraoui; F. Daoud; I. Khalil; M. Moradi-Lakeh; L.J. Abu-Raddad; R.R. Hamadeh; A. Mokdad
S.A. Cannistra; B.G. Haffty; K. Ballman

Contact Information:
Karla Ballman, Ph.D.
Chief, Division of Biostatistics and Epidemiology
Department of Population Health Sciences
Tel: (646) 962-8023
Fax: (646) 962-0281

Mailing Address:
Weill Cornell Medical College
Department of Population Health Sciences Division of Biostatistics and Epidemiology
402 East 67th Street, Box 74
New York, NY 10065

Career Opportunities


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