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[IP] RE: Well, who knows if I'll get a pump....

Actually, a C-peptide test will not answer whether someone has type 1 or
type 2, it is only a measure of their level of endogenous insulin
production.  It is true that most type 1s have little if any endogenous
insulin production by diagnosis (even during the honeymoon period, the
C-peptide levels are below normal).  However, type 2s may have elevated
levels resulting from insulin resistance, normal C-peptide levels, or
negligible levels, depending on their duration with the condition.

Tests include autoantibodies to islet cells (ICA), antibodies to insulin
(IAA) and glutamic acid decarboxylase autoantibodies (GAD Ab) are very
typical, and they will often accompany a C-peptide test as well.  ICAs
are present in 80% of newly diagnosed type 1 patients, but are not
present in any type 2 patients.  ICA, GAD Ab and IAA do not appear all at
once, but at random, varying rates depending on the individual patient. 
Therefore, an entire battery of tests would really need to be done to
determine if someone has type 1, type 2, LADA, or some combination.  Many
doctors make assumptions (sometimes incorrectly) based on incomplete
information or certain assumptions on what a patient should look like. 
Older patients are the most likley to be mis-typed, and therefore need
the battery of tests to accurately determine the most appropriate


Date: Thu, 2 Dec 2004 15:38:55 -0800 (PST)
From: Don Stevens <email @ redacted>
Su bject: Re: [IP] Well, who knows if I'll get a pump....

C-Peptide test will  diagnose you as a type 1 or type 2. 
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