NOTE: this is not a function.
This is a categorical variable derived by Statistics Canada that uses various intermediate alcohol variables to categorize individuals into 3 distinct groups:
No drink in the last 12 months.
cchsflow variable name for type of drinker (12 months)
This variable was introduced in the 2007-2008 cycle of the CCHS, and became the sole derived variable that categorized people into various drinker types from 2009 onwards. Unlike ALCDTYP, this variable does not distinguish between former and never drinkers.