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From: glenm@athena.UUCP
Newsgroups: sci.med
Subject: question about blood chemistry tests
Message-ID: <688@athena.UUCP>
Date: Fri, 24-Oct-86 13:09:22 EST
Article-I.D.: athena.688
Posted: Fri Oct 24 13:09:22 1986
Date-Received: Sun, 26-Oct-86 01:37:40 EST
Organization: Tektronix Inc., Beaverton, Or.
Lines: 14


I am wondering how the "normal" ranges for blood chemistry
tests are established.  I assume they use mean and standard
deviation values to set up a range that includes 95% of the
population.

Is this really the case?  If so, doesn't this approach cause
problems in some cases?  For example, a person whose thyroid
hormone levels were near the upper end of the "normal" range would 
probably have more energy than one with levels near the low
end of the "normal" range.

	Glen McCluskey
	..tektronix!athena!glenm