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-                         Messages, Output, and Result                         -
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Messages:
    Attaching package: ‘admiral’
    The following object is masked from ‘package:tidylog’:    filter_if
    The following object is masked from ‘package:dplyr’:    filter_if
    Attaching package: ‘lubridate’
    The following objects are masked from ‘package:base’:    date, intersect, setdiff, union
    mutate: new variable 'TRT01P' (character) with 4 unique values and 0% NA
            new variable 'TRT01A' (character) with 4 unique values and 0% NA
    mutate: new variable 'RACEGR1' (character) with 2 unique values and 0% NA
            new variable 'REGION1' (character) with one unique value and 0% NA
            new variable 'LDDTHGR1' (character) with 2 unique values and 99% NA
            new variable 'DTH30FL' (character) with 2 unique values and 99% NA
            new variable 'DTHA30FL' (character) with one unique value and 100% NA
            new variable 'DTHB30FL' (character) with 2 unique values and >99% NA