get_age_details: Function to get the details of the age column
Description
Function to get the details of the age column
Usage
get_age_details(trialdata)
Arguments
trialdata,
data containing individual level trial data
Value
the name of the variable related to age and the unique contents
if success, else error
Details
expecting the data contains the information on age
preferably column names "age", "dob" or "yob" or "date of birth".
"year of birth", "birth year"
If multiple column names match these, then first match will be chosen.