Figure 2.

Horizontal bar charts of frequency of DQ check domains specific to OHDSI, overlaid with DQ harmonization categories. DQ Harmonization Categories brief descriptions: Completeness, Atemporal is the data’s presence in a particular context at an individual time point; Conformance, Calculation is the data’s compliance to constraints relating to computationally derived values from existing data; Conformance, Relational is the data’s compliance to structural constraints as it relates to physical database structure specifications (e.g., primary key and foreign key relationships); Plausibility, Atemporal is the data’s feasibility at an individual time point; Plausibility, Temporal is the data’s feasibility across a series of time points in a defined time period.