Table 2.
Study Data Tabulation Model (SDTM) variable names and descriptions
| Type of variable and variable name | Description |
|---|---|
| Identifier variables | |
| STUDYID | Study ID |
| USUBJID | Unique subject ID |
| --SEQ | Variable to identify unique observations in a dataset |
| Timing variables | |
| VISIT | Visit name |
| VISITNUM | Visit number |
| --DY | Study day of finding |
| --DTC | Date/time of finding |
| --EVLINT | Evaluation interval |
| Grouping and synonym qualifiers | |
| --CAT | Category (grouping qualifier) |
| --SCAT | Subcategory (grouping qualifier) |
| --TEST | Name of measurement, test, or examination (synonym qualifier) |
| --TESTCD | Abbreviated test code (grouping qualifier) |
| Result qualifiers | |
| --STRESC | Character result or finding in standard format |
| --STRESN | Numeric result or finding in standard format |
| --ORRES | Result or finding in original units |
| Record qualifiers | |
| --DRVFL | Derived flag |
| Variable qualifiers | |
| --STRESU | Standard units of result or finding |
| --ORRESU | Units of original result or finding |