Character indicator of whether the observation occurred while the subject was on product. A codelist of Y, N, null may be used as described in ADaMIG Section 3.3.8, Indicator Variables for BDS Datasets. Example derivation: If ADSL.TRTSDT <= ASTDT <= ADSL.TRTEDT then ONTRTFL = "Y" This variable is conditional on whether the concept of on product is a feature of the study and used in analysis. |