Exposure

TODO: Brief description of table purpose.

Field	Required	Type	Description
exposure_id	Yes	integer	A system-generated unique identifier for each exposure event.
person_id	Yes	integer	A foreign key to the Person who is subjected to the exposure.
exposure_concept_id	Yes	integer	A foreign key to the standard exposure concept identifier in the Standardized Vocabularies.
exposure_start_date	Yes	date	The date the exposure started.
exposure_end_date	No	date	The date the exposure ended.
value_as_number	No	float	The exposure value stored as a number.
value_as_concept_id	No	integer	A foreign key to a exposure value represented as a Concept from the Standardized Vocabularies.
value_source_value	No	varchar(50)	The source value associated with the content of the value_as_number or value_as_concept_id as stored in the source data.
unit_concept_id	No	integer	A foreign key to a Standard Concept ID of Measurement Units in the Standardized Vocabularies.
unit_source_value	No	varchar(50)	The source code for the unit as it appears in the source data
exposure_source_concept_id	No	integer	A foreign key to a Concept in the Standard Vocabularies that refers to the code used in the source.
exposure_source_value	No	varchar(50)	The Exposure name as it appears in the source data.
data_source_id	No	integer	A foreign key to the data_source which the exposure is derived from.
link_operator_concept_id	No	integer	TODO
link_scope_concept_id	No	integer	TODO
link_numeric_qualifier	No	float	TODO
link_source_value	No	varchar(50)	TODO

Conventions

• TODO

Link (TODO)

• Brief description: What it accomplishes, conjunction of operator, scope and numeric qualifier, etc

Examples

Example	Operator	Scope	Numeric_Qualifier
Average of nearest 3 measurements	Mean	nearest (x)	3
Number of facilities within 5 miles	Count	within miles (x)	5

Operator concepts

Name	Description
Mean	Average
...	...

Scope concepts

Name	Description
Nearest (x)	The X closest locations to the individual's locaton
...	...