What is the reliability of glucose tolerance testing (GTT)?

Updated: May 10, 2021
  • Author: Jiun-Lih Jerry Lin, MBBS, MS(Orth); Chief Editor: Eric B Staros, MD  more...
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Results of the GTT can be unreliable due to patient non-compliance to the preparation protocol; the timing of the test; and the activity of the patient on the test day. If the results are marginally abnormal and it is suspected that results may be incorrect, repeating the GTT may be considered. [2]

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