Table 2

OGTT for the diagnosis of diabetes

Advantages
 • Sensitive indicator of risk of developing diabetes
 • Early marker of impaired glucose homeostasis
Disadvantages
 • Lacks reproducibility
 • Extensive patient preparation
 • Time-consuming and inconvenient for patients
 • Unpalatable
 • Expensive
 • Influenced by numerous medications
 • Subject to the same limitations as FPG, namely, sample not stable, needs to be performed in the morning, etc.