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Timing variables are copied from the SDTM and derived within ADaM. Common timing variables are provided in this section. If other timing variables are collected in SDTM and pertinent for analysis, these should be included in ADaM. Additional timing variables, such as those for period start and end dates, can be included. For more details on timing variables, see Section 2.9.6.3, Timing Variables for BDS Datasets.