Concept Sets

In Atlas, the cohort definition starts by creating a Concept Set using medical codes. The Concept Set is then used to create cohorts using additional criteria defined in Cohort Definitions.

This section contains advanced Concept Set creation tutorials.

Topics in the section

• Create Concept Sets using standard code descendants

• Exclude and Remove codes from Concept Set

• Simplify Concept Sets that use standard code descendants

• Create Concept Sets using equivalent standard and non-standard codes

• View standard code hierarchy in Atlas