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The table below contains a list of standard suffix fragments (i.e., variable name fragments used as the last part of a variable name) that are required when naming variables in ADaM datasets, as defined in Predefined Standard Variables for ADSL, Predefined Standard Variables for BDS, and Predefined Standard Variables for OCCDS. For For these fragments, it is a requirement that the appropriate fragment be used whenever the concept applies and that the fragment is reserved to be used only for the corresponding concept. For example, a variable whose name ends in DT must contain a numeric date, and a variable created to contain a numeric date must have a name ending in DT.
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Num | Fragment | CDISC Notes | 1 | GRy | Suffix used in names of grouping variables, where "y" refers to the grouping scheme or algorithm (not the category within the grouping). Note that GRy can be abbreviated to Gy when necessary to comply with the variable name length limit of 8 characters. The corresponding numeric version of the variable will use the suffix GRyN (or GyN if the Gy abbreviation is used). For more information on grouping variables see General Variable Conventions. | 2 | FL | Suffix used in names of character flag variables, when the valid values of the variable are Y/null or Y/N/null. The corresponding numeric version of the variable will use the suffix FN. For more information on flag variables, see General Variable Conventions and Flag Variable Conventions | 3 | DT | Suffix used in names of numeric date variables. For more information on timing variables, see Timing Variable Conventions and Timing Variables for BDS Datasets | 4 | TM | Suffix used in names of numeric time variables. For more information on timing variables, see Timing Variable Conventions and Timing Variables for BDS Datasets for examples of timing variables. Note that although ADaM variable ARELTM ends in TM, it is an exception, and is not a numeric time variable. In addition, the SDTM variables -- ELTM are not numeric time variables. | 5 | DTM | Suffix used in names of numeric datetime variables. For more information on timing variables, see Timing Variable Conventions and Timing Variables for BDS Datasets for examples of timing variables. | 6 | DTF | Suffix used in names of date imputation flag variables. Note that DTF can be abbreviated to DF to comply with the variable name length limit of 8 characters. For more information, see Timing Variables for BDS Datasets for examples of timing imputation variables. | 7 | TMF | Suffix used in names of time imputation flag variables. Note that TMF can be abbreviated to TF to comply with the variable name length limit of 8 characters. For more information, see Timing Variables for BDS Datasets for examples of timing imputation variables. | 8 | DY | Suffix used in names of relative day variables that do not include day 0. For more information on timing variables, Timing Variable Conventions and Timing Variables for BDS Datasets , for examples of timing variables. | |
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