Diagnostic criteria for the three-hour 100 gram oral GTT for gestational diabetes mellitus
Diagnostic criteria for the three-hour 100 gram oral GTT for gestational diabetes mellitus
Carpenter/Coustan
National Diabetes Data Group
Plasma or serum: mg/dL (mmol/L)
Plasma: mg/dL (mmol/L)
Fasting
95 (5.3)
105 (5.8)
One hour
180 (10)
190 (10.6)
Two hours
155 (8.6)
165 (9.2)
Three hours
140 (7.8)
145 (8)
A 100 gram oral glucose load is given in the morning to a patient who has fasted overnight for at least eight hours. A positive test is generally defined as ≥2 glucose values at or above these thresholds.
GTT: glucose tolerance test.
Data from: VanDorsten JP, Dodson WC, Espeland MA, et al. National Institutes of Health consensus development conference statement: Diagnosing gestational diabetes mellitus. NIH Consens State Sci Statements 2013; 29:1.