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ADCVNTP
The ADCVNTP includes tests pertinent to analyses. The records from CV where CVTESTCD = "LVEF_C" and "RVEF_C" and the records from LB where LBTESTCD = "BNPPRONT" were selected. Many lab draws may occur throughout the year, but only those linked to a specific visit were included. By subsetting the LB dataset by LBLNKID not missing, laboratory data that aligns with CV data can be filtered out and sorted using USUBJID and VISIT. If LBLNKID is not available, a windowing strategy could be used to select the laboratory draw closest to that visit for merging with CV, computed in AVISIT.
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