Gestational diabetes & diabetes in pregnancy

Performance of the Dexcom G7 Continuous Glucose Monitoring System in Pregnant Women with Diabetes

Diabetes Technol TherPublished Diagnostic accuracy study

Authors' conclusion

The G7 system is accurate and safe during pregnancies complicated by diabetes and does not require confirmatory fingerstick testing.

Study context

Population
Pregnant women with T1D, T2D or GDM; 6-h clinic sessions over the 10-day sensor wear96 evaluable · Pregnant women with T1D 59 · T2D 21 · or GDM 25
Participants
105 women
Comparison
G7 continuous glucose monitoring (CGM) values vs YSI arterialized venous glucose comparator
  • G7n = 96
Outcome
Proportion of CGM values in the 70-180 mg/dL range within 15% of comparator glucose values

Performance

As reported in the abstract

CGM values in 70-180 mg/dL range within 15% of comparator values

Pairs with CGM in 70-180 mg/dL range

1739

Within 15% of comparator values

83.2%

Lower bound of 95% CI

79.8%

Secondary outcomes

%20/20 agreement rate, CGM values 40-400 mg/dL

Pairs
2102
%20/20 agreement rate
92.5%

%20/20 agreement rate, comparator values 63-140 mg/dL

Pairs
1659
%20/20 agreement rate
92.3%

%20/20 agreement rate by sensor wear day · days 1, 4 and 7, and 10

Day 1
78.6%
Days 4 and 7
96.3%
Day 10
97.3%

Consensus error grid analysis

Pairs in clinically acceptable A and B zones
99.8%

Safety

Serious adverse events
0

Original publication

Performance of the Dexcom G7 Continuous Glucose Monitoring System in Pregnant Women with Diabetes. Diabetes Technol Ther. Published 1 March 2024. doi:10.1089/dia.2023.0516

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