Center for Clinical and Translational Science
Welcome to the International Society on Thrombosis and Haemostasis Bleeding Assessment Tool (ISTH-BAT), supported by the Rockefeller University Center for Clinical and Translational Science. The ISTH-BAT is dedicated to the collection, curation, analysis, and dissemination of data about bleeding phenotypes. It is backed by a Bleeding History Ontology (BHO), which encodes information about all bleeding symptoms in an electronic format that facilitates standardization and analysis. You are encouraged to review the ontology, which was developed by the Rockefeller University Bleeding History Phenotyping Team, which is posted on the National Center for Biomedical Ontology (NCBO) website , and make recommendations for additions or modifications.

The ISTH-BAT system has:
  • A web-based data collection instrument termed a phenotyping recording instrument that allows the investigator to administer a bleeding history questionnaire from any computer with Internet access.
  • A web-based instrument for recording laboratory results pertaining to hemostasis, PRI Labs.
  • A web-accessible database designated as a data repository (RUBHPSR and ISTH-BATR) that can be queried using our data representation and query utilities.
If you are an investigator interested in evaluating this system for use in your studies, please follow the "Documentation" link or email Yupu Liang at If you are already a registered investigator, please click the "Phenotype Recording Instrument" link in order to administer a questionnaire, or click the "Data Representation and Queries" link to view or query the database of bleeding phenotypes.
ISTH-BAT Phenotype Recording Instrument
Data Representation
How to join the ISTH-BATR

The informatics infrastructure to support ISTH-BAT development is supported by a Clinical Translational Science Award [UL1 TR000043] to Rockefeller University from the Clinical Center for Research Resources and the National Center for Advacing Translational Sciences, U.S.
National Institutes of Health 

  The Rockefeller University Center for Clinical and Translational Science | The Rockefeller University Hospital