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As stated previously, OCCDS is different from the ADaM Basic Data Structure (BDS). There is no PARAM nor AVAL, for example. Likewise, some variables defined below may be used in non-OCCDS ADaM dataset structures, such as TRTEMFL if needed. The more standardized variables commonly occurring in the ADaM OCCDS are described here in tabular format. In general, include all variables from the SDTM dataset and corresponding supplemental qualifiers that are needed for analysis or traceability. For traceability when copying variables from SUPPQUAL, it is recommended to use variable names that exactly match the corresponding SUPPQUAL.QNAM values. Additional study- or therapeutic- specific variables may be added as needed but should follow the standard variable-naming conventions described

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