DIABETES MELLITUS-INVESTIGATION

SUMMARY

1. FPG >= 126 mg/dL
2. Random plasma glucose >= 200 mg/dL with symptoms (polyuria, polydipsia)
3. HbA1c >= 6.5%
4. 2-hr plasma glucose >= 200 mg/dL after a 75 gm OGTTHbA1c can be misleading in certain patient groups: African-Americans, in hemoglobinopathies and thalassemias, patients with iron deficiency or hemolytic anemias, in hepatic/renal diseases.

Reference(s)

Wilkinson, I., Furmedge, D. and Sinharay, R. (2017). Oxford handbook of clinical medicine. Oxford: Oxford University Press. Get it on Amazon.
Feather, A., Randall, D. and Waterhouse, M. (2020). Kumar And Clark’s Clinical Medicine. 10th ed. S.L.: Elsevier Health Sciences. Get it on Amazon.
Hannaman, R. A., Bullock, L., Hatchell, C. A., & Yoffe, M. (2016). Internal medicine review core curriculum, 2017-2018. CO Springs, CO: MedStudy.
Therapeutic Guidelines. Melbourne: Therapeutic Guidelines Limited. https://www.tg.org.au [Accessed 2021].