Assuming these results are on venous plasma glucose, then the results are an
excellent example of how the ADA criteria and the 2000 WHO criteria differ.
The ADA focuses on fasting and the WHO looks at fasting and 2hr post glucose
load. In a recent audit up to 40% patients with a fasting glucose greater
than 7 mmol/L had a 2 hour glucose of between 7.8 and 11.1 mmol/L. Also 30%
of patients diagnosed as being diabetic on the basis of a 2hr glucose
greater than 11.1, had a fasting glucose between 6.1 and 7 mmol/L (poster to
be presented at Focus 2001).
It has to be accepted that there is a continuum, and patients can be a
fasting diabetic and/or a post-prandial diabetic. Laboratories who rely on
the ADA criteria and just focus on fasting glucose, will miss the
post-prandial diabetics. Labs must do a GTT on patients with fasting
glucose between 6.1 and 7 mmol/L.
The patient is therefore probably a diabetic (fasting) and the diagnosis
should be confirmed with another fasting glucose.
Martin Myers
Preston and Chorley Hospitals
-----Original Message-----
From: Mohammad Al-Jubouri [mailto:[log in to unmask]]
Sent: 15 March 2001 15:10
To: [log in to unmask]
Subject: OGTT interpretation
How would list members interprete the following OGTT
on a 62-year-old man using the 1998 revised WHO
criteria:
0 min 7.2 mmol/L
60 min 12.6 mmol/L
120 min 9.5 mmol/L
Thanks.
=====
Dr. M A Al-Jubouri
Consultant Chemical Pathologist
Whiston Hospital
Prescot
Merseyside L35 5DR
UK
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