Document specimen table

Author: parisni

Diff for: etl/StandardizedClinicalDataTables/MEASUREMENT/README.md

@@ -19,8 +19,8 @@
 
 ## [labevents](https://mimic.physionet.org/mimictables/labevents/)
 
-- when flag is abnormal then `value_as_concept_id` refers to LOINC code for " abnormal", else "non abnormal" and null when unknown
 - logical Observation Identifiers Names and Codes (LOINC) = database and universal standard for identifying medical laboratory observations loinc.csv
+- abnormal values from labevents do not have any equivalent in OMOP. The ranges should be prefered, but are not yet provided in MIMICt 
 
 ## [microbiologyevents](https://mimic.physionet.org/mimictables/microbiologyevents/)
 

Diff for: etl/StandardizedClinicalDataTables/SPECIMEN/README.md

@@ -1,3 +1,24 @@
-# Remarks
+# Link to CommonDataModel
+
+- [SPECIMEN](https://github.com/OHDSI/CommonDataModel/wiki/SPECIMEN)
+
+# Principle
+
+A specimen is linked to a measurement by the fact_relationship table and vice-versa. (relationship_id "has specimen").
+Since MIMIC does not provide that level of information, they are populated with most appropriate information in order to keep OMOP philosophy.
+This saves the prelevement date from chartevent (charttime VS storetime).
+
+# Source Tables (mimic)
+
+## [charteevents](https://mimic.physionet.org/mimictables/chartevents/)
+
+- laboratory chartevents data generates a specimen for each result
+
+## [labevents](https://mimic.physionet.org/mimictables/labevents/)
+
+- laboratory data generates a specimen for each result
+
+## [microbiologyevents](https://mimic.physionet.org/mimictables/microbiologyevents/)
+
+- a specimen is generated for each single specimen id
 
-There is no specimen related data in MIMIC