Cohort Discovery

The Cohort Discovery is a web-based tool that allows OHSU researchers to discover patient cohort counts from Epic data for preparatory to research purposes.  This information contained in Cohort Discovery is de-identified but patient data sets can be extracted from saved searches with proper IRB approval.



  • Assess the feasibility of research studies
  • Identify patients meeting inclusion/exclusion criteria 
  • Pre-IRB study planning



  • Demographics
  • Diagnoses
  • Medications
  • Procedures
  • Laboratory Results including Microbiology
  • Surgeries
  • Patient Visits
  • Vital Signs


To utilize this tool researchers must participate one time in a two hour training prior to gaining access.  Tutorials are offered once a month in the BICC 120 Training Room.  To register please refer to the User Requirements section.

  • Thursday, October 30, 2014, from 10:00 am to 12:00 pm
  • Wednesday, November 19, 2014 from 12:30 pm to 2:30 pm
  • Tuesday, December 16, 2014 from 12:30 pm to 2:30 pm
  • Thursday, January 15, 2015 from 12:30 pm to 2:30 pm
  • Tuesday, February 17, 2015 from 12:30 pm to 2:30 pm
  • Wednesday, March 25, 2015 from 1:00 pm to 3:00 pm
  • Thursday, April 16, 2015 from 12:30 pm to 2:30 pm
  • Wednesday, May 20, 2015 from 1:00 pm to 3:00 pm


To register for a tutorial, send an email to OCTRI Informatics Research Support.  Pre-registration at least 1 business day in advance is required to attend a Cohort Discovery training.

  • Prior to registration attendees must have a current OHSU network log-in with an OHSU user ID and password and an OHSU employee ID number. 
  • There are 3 pre-requisite (required) trainings in Big Brain that an individual must complete prior to attending the tutorial.   The trainings that need to be completed and have a current status as "Completed" are :
    • HIPAA - Privacy and You
    • RCR for All
    • RCR Involving Human Subjects
  • Upon arrival at training, individuals will need to sign the Cohort Discovery Access Agreement.


Question mark

If you've already attended a Tutorial Session and you need help please send an email to the Informatics Research Support Team.


Cohort Discovery utilizes open-source software funded by an NIH cooperative agreement with Partners HealthCare System through the National Center for Biomedical Computing (NCBC) program called i2b2 (Informatics for Integrating Biology and the Bedside).