Gestational diabetes & diabetes in pregnancy

Congenital malformations among offspring of women with type 1 diabetes who use insulin pumps: a prospective cohort study

DiabetologiaPublished Secondary analysis of a prospective multinational cohort study

Authors' conclusion

Insulin pump treatment was not associated with a lower risk of congenital malformations, despite better glycaemic control in early pregnancy compared with MDI. Further studies exploring the efficacy and safety of pump treatment during pregnancy are needed.

Study context

Population
Pregnant women with T1D in a real-world setting
Participants
2,088 women
Comparison
Insulin pump vs MDI
  • Pumpn = 750
  • MDIn = 1,338reference
Primary endpoint
Offspring with congenital malformations or perinatal or neonatal death
Methodological detailsreal-world setting, propensity score-matched
  • Real-world setting
  • Propensity score-matched

Primary result

As reported in the abstract

Fetuses with at least one malformation
Each group vs MDIEstimate (95% CI)P value
Pump
crude OR 1.23(0.94–1.61)
P = 0.13
Pump
propensity score-matched (adjusted) OR 1.11(0.81–1.52)
P = 0.52

Further findings

OutcomePumpMDIEstimateP value
Fetuses with at least one major malformation2.8%3.1%crude OR 0.89 (95% CI 0.52–1.51)P = 0.66
Fetuses with at least one major malformationadjusted OR 0.78 (95% CI 0.42–1.45)P = 0.43
Fetuses with ≥1 minor malformation (no major malformations)10.7%8.1%crude OR 1.36 (95% CI 1.00–1.84)P = 0.05
Fetuses with ≥1 minor malformation (no major malformations)adjusted OR 1.23 (95% CI 0.87–1.75)P = 0.25
Perinatal death1.6%1.3%crude OR 1.23 (95% CI 0.57–2.67)P = 0.59
Perinatal deathadjusted OR 2.02 (95% CI 0.69–5.93)P = 0.20

Neonatal death

P = not applicable

HbA1c below 75 mmol/mol (9%) at enrolment

P < 0.001

Folic acid supplementation reported

P < 0.001

University degree

P < 0.001

HbA1c at enrolment · enrolment (gestational week 8; 95% CI 4, 14)

P < 0.001

  • HbA1c at enrolment: 6.8±0.9% vs 7.1±1.3%
  • HbA1c at enrolment: HbA1c remained lower in pump users after propensity score matching

Original publication

Congenital malformations among offspring of women with type 1 diabetes who use insulin pumps: a prospective cohort study. Diabetologia. Published 14 January 2023. doi:10.1007/s00125-022-05864-6

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