–TESTCD variables were designed to be utilize as source of names for new variables during data transposing from vertical structure to horizontal. Therefore values of --TESTCD and --TEST variable are expected to follow conventions for variable names and labels in SAS XPORT format.
Also according SEND IG 3.0 #4.3.2 on page 25:
"CONTROLLED TERMINOLOGY TEXT CASE
It is recommended that controlled terminology be submitted in upper-case text for all cases other than those described as exceptions below. When extending a controlled terminology list, the case-sensitivity convention of that list should be followed.
Deviations to these rules should be described in the data definition file.
- a. If the external reference for the controlled terminology is not in upper case, then the data should conform to the case prescribed in the external reference (e.g., National Cancer Institute [NCI]).
- b. Units, which are considered symbols rather than abbreviated text (e.g., mg/dL).
- c. --TEST variables, which are presented in title case"