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Observations about study subjects are represented in a series of domain datasets. All datasets are structured as flat files with rows representing observations and columns representing variables. Data represented in datasets will include:

  • Data as originally collected or received
  • Data from the protocol
  • Assigned data
  • Derived data


Number of datasets

for which there will generally be a single dataset for each domain. 


Dataset naming conventions

Datasets names will reflect the following conventions:

  • be a unique 2 to 4 letter character code (RELREC? SUPPQUAL)
  • This code, which is stored in the SDTM variable named DOMAIN, is used in 4 ways: as the dataset name, as the value of the DOMAIN variable in that dataset, as a prefix for most variable names in that dataset, and as a value in the RDOMAIN variable in relationship tables (see Section 8, Representing Relationships and Data).

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