sdtm_tv.RdTrial Visits data frame - One record per planned Visit per Arm
sdtm_tva data frame with 21 rows and 9 columns. See https://github.com/SafetyGraphics/safetyData/blob/main/data-raw/sdtm/README.md for more details and full data specification. Columns:
STUDYID text - Study Identifier
DOMAIN text - Domain Abbreviation
VISITNUM float - Visit Number
VISIT text - Visit Name
VISITDY integer - Planned Study Day of Visit
ARMCD text - Planned Arm Code
ARM text - Description of Planned Arm
TVSTRL text - Visit Start Rule
TVENRL text - Visit End Rule