In order to allow single sign on functionality with other Research applications, the authentication method will be changing to CAS (Central Authentication Service), also known as Kerberos ID. 

This will become effective 5/30/2017. 

If you have any questions, please contact Research IT Support at 916-703-9122.

Cohort Discovery Release Notes
System Behavior Notice:
June 2016

Because of updates and additions to the ontology terms, old queries will be catalogued for archiving purposes, but will NOT be directly available in the new version. If you have a query from the old version that is absolutely needed for research purposes AND for which you have received IRB approval, we can retrieve the patient list according to the original query; however, old queries cannot be imported into the new version. As we continue to change and expand the ontology, older queries may require modifications to run correctly. We will notify users when these changes go into effect.

Cohort Discovery Release Notes
System Behavior Notice:
October 2017

As a user, you will experience little to no difference in your application experience. This application update was done to upgrade a number of things behind the scenes setting us up for the release of new features in the near future. General application interaction will remain exactly as it was before. You may notice some new nodes in the ontology. These nodes were added for greater specificity and will only be apparent at the deepest levels. As part of this update we must move some of your historical query data. If this causes any interruption in your ability to reference and use your old queries, please reach out to us. Otherwise, please continue to use the app.

Cohort Discovery Release Notes
System Behavior Notice:
July 2016

In this release the underlying technology remains the same but we have focused on making some incremental improvements to the ontology. First, we have re-arranged it to allow for more rapid inclusion of new data in the future. This re-arrangement sets the stage for better historical query support in future releases. Second, we have added the ICD-10 diagnoses as searchable concepts.
A few important points about this upgrade:
1. Due to the ontology re-arrangement, your historical queries may not work. You may reach out to us at hs-cohortdiscovery@ucdavis.edu if you need any assistance re-creating your queries.
2. As we release the ICD-10 diagnoses concepts please understand that we will stop loading diagnoses in ICD-9 format retroactive to 09/30/2015 and we will load only ICD-10 diagnoses after this date. This approach is being taken to faithfully represent the data as it is created and stored in our clinical systems of record.

What’s New in Cohort Discovery

Over the past few months, the Informatics team has been heavily engaged in improving the user experience associated with Cohort Discovery. We upgraded the underlying technology as well as the software itself in order to resolve a number of issues, including query speed. The updated tool will have a look and feel nearly identical to the previous version.

A newly designed, web-based landing page will be the source for all up-to-date information regarding the Cohort Discovery application. You can access the landing page through the familiar URL (https://cohortdiscovery.ucdmc.ucdavis.edu/). The landing page will also provide the link you need to access the application.

Below is a list of specific changes, including plans for the near future, along with a description of system behavior anticipated to occur as we continue to improve the tool.

Specific Changes:

  1. Listed below are the links found in the top navigation bar of Cohort Discovery.
    1. Find Patients – Clicking this link will return you to the main window with the query tool panels.
    2. Analysis Tools – This link is reserved for future upgrades that will provide a way to probe deeper into a retrieved dataset using demographic, temporal and comparative exploration.
    3. Help – Clicking this link opens a pop-up window with tool documentation from the creators of Cohort Discovery.
    4. Change Password – Please avoid using this link. It is not functional in the UCDHS environment. If you need to change your password, contact the IT Help desk at 916-734-4357; they are available 24 hours a day/7 days a week. Let them know that you want to change your Health System password.
    5. Logout – Clicking this link will log you out of the application.
  2. Ontology – The first of a few planned changes has already been made. There are now ontology entries for some ICD10 procedure codes. This is relevant because UCDHS stopped coding procedures with the 2 digit ICD9 codes on 10/01/2015. We will also be adding ICD10 diagnosis codes and making additional improvements as soon as new data additions become available.

Cohort Discovery Release Notes
System Behavior Notice:
January 2016

Because of updates and additions to the ontology terms, old queries will be catalogued for archiving purposes, but will NOT be directly available in the new version. If you have a query from the old version that is absolutely needed for research purposes AND for which you have received IRB approval, we can retrieve the patient list according to the original query; however, old queries cannot be imported into the new version. As we continue to change and expand the ontology, older queries may require modifications to run correctly. We will notify users when these changes go into effect.