In the medical universe, there's a kind of moral law, which goes like this: if doctors do a battery of blood tests for no particular reason, one or more results is likely to be off, requiring more blood tests.
Kidding aside, ask your doctor, but I doubt these test results have any significance, concerning alopecia or anything else. For localized patches of the condition--the most common form--I don't recommend any testing at all.
Best.
Dr. Rockoff