List View
Learn to build and use list views in the Cohort Browser.
An Apollo license is required to use the Cohort Browser. Contact DNAnexus Sales for more information.

How to Build a List View Tile

A list view can be built to visualize categorical fields. You can identify categorical fields via the
label in the field list.
Categorical fields with a simpler structure can also be visualized as row charts.
Supported Field Types
Categorical Multiple
Categorical Hierarchical
Categorical Hierarchical Multiple
A list view can also be used to display a multi-variable chart:
Dimension 1
Dimension 2
1x Categorical (<=20 categories)
1x Categorical (<=20 categories)

Using List Views in the Cohort Browser

The Example below is field Main ICD-10 Diagnoses visualized as a list view.
Field categories are shown as line items in a list, along with count / percentage of records that fall under each category. For example, the chart shows 25,961 patients have been diagnosed with "Chapter II: Neoplasms", which is 25.96% of current cohort size.
Categories with children categories can be further expanded to reveal further levels of hierarchy.
Browsing in List View of ICD-10 Codes
You can also quickly narrow down to a smaller set of items by searching a particular keyword.
Searching in List View
For non-hierarchical fields, the list is sorted by Count to help identify the top items within a given cohort selection. The following field Treatment/Medication Code for example, lists the most frequently taken medications among the current cohort selection.
Example List View: Treatment / Medication Code

Visualize Multiple Fields

List views can also be used to visualize combination of two categorical fields with limited number of categories. Same combination can also be visualized as Stacked Row Charts.
Below is an example of combining categorical field Gender and another categorical field Coffee Types. Categories under secondary field Coffee Types are shown as sub-categories of that under primary field Sex. From this example chart, we know that within current cohort selection, "Instant coffee" is the most used coffee type among female patients.
Example List View: Gender x Coffee Types

List Views in Cohort Compare

In Cohort Compare mode, each list view will display a column for each cohort in the current session.
The percentage calculation may use different denominator per each cohort. In the example list view shown using Treatment/Medication Code, 8.6% of patients in the cohort Case have taken paracetamol, while 18.66% of patients in the cohort Control have taken the same medicine.
List view: Treatment/Medication Code in compare mode

Notes on Data Preparation

The following Ingestion Data Types are supported in single-variable list views:
  • String Categorical
  • String Categorical Hierarchical
  • String Categorical Multi-Select
  • String Categorical Multi-Select Hierarchical
  • String Categorical Sparse
  • String Categorical Sparse Hierarchical
  • Integer Categorical
  • Integer Categorical Hierarchical
  • Integer Categorical Multi-Select
  • Integer Categorical Multi-Select Hierarchical
While _sparse serial types are supported in list views, the non-encoded values are not yet supported in list views and will not appear as line items.