. Author manuscript; available in PMC: 2020 Aug 1.

Published in final edited form as: J Biomed Inform. 2019 Jun 22;96:103239. doi: 10.1016/j.jbi.2019.103239

Table 2.

Concept classes and instance counts

Concept class (Category)	Count	Concept class (Category)	Count
Author	29,163	Sig Stub	858
Reference	5,626	Component^*	555
ReferenceTitle	5,540	Component Class^*	333
ReferenceURL	5,485	Journal	187
PubMedURL	5,532	Condition^**	120
Sig	3,971	Year^**	82
Study	4,869	Procedure^*	50
Study name short	4,550	Condition Class^**	49
Brand name^*	2,131	Context^*⁺	33
Regimen^*⁺	1,546	BioCondition^**	23
Regimen Stub	1,367	Regimen type^*	18
Study Group	958	Route^*	13
Total unique concepts			73,058

These concepts classes are included in the first public OHDSI release

^**

These concepts classes will be included in the second public OHDSI release

⁺

These concept classes are standard elements for OHDSI