Gestational diabetes & diabetes in pregnancy

Gestational Glucose Intolerance and Risk of Future Diabetes

Diabetes CarePublished Retrospective cohort study

Main finding · Incident diabetesResult — go to the resultAdjusted hazard ratio 2.01 95% CI 1.54–2.62

Authors' conclusion

GGI confers an increased risk of future diabetes. Routinely available clinical data identify an unrecognized group who may benefit from enhanced diabetes screening and prevention.

Study context

Population
Individuals followed for prenatal and primary care16,836 individuals
Participants
2,943 / 20,359 / 909
Exposure
Gestational glucose intolerance (GGI) vs normal glucose tolerance in pregnancy
  • GGIn = 2,943
  • Normal glucose tolerancen = 20,359reference
  • Gestational diabetes mellitus (GDM)n = 909
Outcome
Incident diabetes
Follow-up
Median 8.4 years
Methodological detailsCox proportional hazards models with time-varying exposures and covariates
  • Cox proportional hazards models with time-varying exposures and covariates

Main finding

As reported in the abstract

median 8.4 years

Adjusted hazard ratio

2.01

95% CI 1.54–2.62

P < 0.001

GGIvs Normal glucose tolerance
aHR 2.01 (95% CI 1.54–2.62); P < 0.001
Individuals who developed diabetes
428

Observational data: associations, not effects.

Further findings

OutcomeaHR (CI)P value
Incident diabetes by number of abnormal OGTT valuesZero abnormal OGTT valuesvs Normal glucose tolerance1.54 (1.09–2.16)P = 0.01
Incident diabetes by number of abnormal OGTT valuesOne abnormal OGTT valuevs Normal glucose tolerance2.97 (2.07–4.27)P < 0.001
Incident diabetes by number of abnormal OGTT valuesGDMvs Normal glucose tolerance8.26 (6.49–10.51)P < 0.001
OutcomeGGIGDM
Fraction of diabetes cases attributable · 10 years after delivery8.5%28.1%

Original publication

Gestational Glucose Intolerance and Risk of Future Diabetes. Diabetes Care. Published 21 December 2022. doi:10.2337/dc22-1390

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