I am doing an analysis of a monthly survey. Some of the respondents answered the dependent variable question every time it was administered, others answered some of the months and others never answered. I would like to compare the group that answered the question at least once with the group that never answered.
If I use the syntax:
drop if var==q.
I am left with all of the unique IDs who answered the question at least once.
If i use the syntax:
keep if var==q.
I get all of the unique IDs who never answered and those that occasionally answered.
How can I get the group that never answered without the group of occasional responders "leaking into" the group?
Thank you,
Karen Dunn Lopez, RN, PhD(c)
The University of Iowa
College of Nursing
