Diabetes and the OGT Test

Fasting Plasma Glucose (FPG) : 20-40%

HgA1c: 20-35%

HOMA-IR: 15-30%

1-Hour OGTT: 10-20%

Sources:

1. FPG: Bur et al. (2003); Gestational Diabetes UK (2021); ADA Diabetes Care (2025)
2. HbA1c: Gestational Diabetes UK (2021); Kaiafa et al. (2021); PMC 1-Hr OGTT Study (2023)
3. HOMA-IR: MDCalc (2025); Diabetes Care (2025)
4. 1-Hr OGTT: PMC 1-Hr OGTT Study (2023); Gestational Diabetes UK (2021); Alyass et al. (BPS, 2025)