Gestational diabetes & diabetes in pregnancy

Continuous Glucose Monitoring-Measured Glucose Levels During Oral Glucose Tolerance Testing in Pregnancy

Diabetes Technol TherPublished Method comparison study

Main finding · CGM vs BG glucose during OGTTResult — go to the resultDifference 6 ± 13 mg/dL

Authors' conclusion

CGM glucose measurements using Dexcom G6 Pro tended to be slightly higher than BG values during an OGTT, leading to more participants who would have been diagnosed with GDM if the BG-based OGTT thresholds were applied to these CGM-measured glucose values.

Study context

Population
Pregnant females undergoing diagnostic oral glucose tolerance test (OGTT) while wearing a blinded continuous glucose monitoring (CGM) sensor
Participants
119 females
Comparison
CGM-measured glucose vs blood glucose (BG) during OGTT
Outcome
CGM vs BG glucose during OGTT
Methodological detailsblinded CGM sensor, Dexcom G6 Pro
  • Blinded CGM sensor
  • Dexcom G6 Pro

Main finding

As reported in the abstract

Difference

6 ± 13 mg/dL

mg/dL

Median CGM minus BG glycemic excursion, 75 g OGTT
12
Median CGM minus BG glycemic excursion, 100 g OGTT
4

Further findings

Gestational diabetes mellitus (GDM) diagnosis by CGM with BG-based thresholds

Of 28 diagnosed with GDM by OGTT BG, also diagnosed by CGM
24 (86%)
Of 91 not diagnosed with GDM by BG, also not diagnosed by CGM
54 (59%)

Original publication

Continuous Glucose Monitoring-Measured Glucose Levels During Oral Glucose Tolerance Testing in Pregnancy. Diabetes Technol Ther. Published 2 April 2025. doi:10.1089/dia.2024.0563

Composed by AI from the published abstract and checked against it. How Briefs are made →

Get them every week

New studies on this topic in My Week and in your Monday e-mail.

We e-mail you a sign-in link and a code. No password, no spam.