Combining Cohorts
Please note: in order to use Cohort Browser on the Platform, an Apollo License is needed.
Cohort Combine Logic
Cohort combine logic allows you to combine existing cohorts with Boolean Logic operations
Overview
Here is a summary of the functions for Cohort Combine
Rules and Boundaries
All cohorts must be from the same dataset.
All cohorts must be saved before being combined.
A cohort that is a result of combine cannot be combined a second time.
Cohorts from different projects can be combined if they use the same underlying database.
Cohort combine are very complex queries
Beware of performance delays and timeouts as query gets more complex.
Use extra caution when:
Combining cohorts with genomic filters
Combining cohorts with complicated filters
Combining cohorts based on very large datasets
How To:
Add your first cohort into the cohort browser
Add your second cohort by selecting the + next to your first cohort on the browser
Pick your cohort and add it to the browser. It will look like this.
Then, to the right of the second cohort, select "combine cohort"
You will then have the following screen to combine. Pick your cohort combine logic, then select combine
Intersection
Overview:
Example:
Union
Overview:
Example:
Subtraction
Important note: the order of the cohorts matters in this.
Overview:
Example 1:
Example 2:
Unique
Overview:
Example:
Complement
Important notes:
Cohort must be saved before creating its complement (same rule as previous)
A combined cohort (Intersection, Union, Subtraction, Unique) can be used to create a complement.
A cohort created as a complement cannot be further used for combine / complement.
Overview:
Example:
Supplemental Information
Overview of Cohort Combine
Resources
To create a support ticket if there are technical issues:
Go to the Help header (same section where Projects and Tools are) inside the platform
Select "Contact Support"
Fill in the Subject and Message to submit a support ticket.
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