Type 1 diabetes

Higher HbA1c Following Younger Age of Transfer From Pediatric to Adult Type 1 Diabetes Services: Data From the Australasian Diabetes Data Network (ADDN) Registry

Diabetes CarePublished Longitudinal registry cohort study

Authors' conclusion

Early transfer from pediatric to adult T1D services was associated with higher HbA1c in real-world settings.

Study context

Population
Youth with T1D transferred from pediatric to adult services 2013–2022, Australasian Diabetes Data Network (ADDN) registry; 49.7% male; mean transfer age 18.1 ± 1.4 years
Participants
784 participants
Exposure
Early vs later transfer from pediatric to adult T1D services
  • Early transferersn = 342
  • Late transferersn = 442reference
Outcome
Adult-service HbA1c and associated factors
Methodological detailsmultivariable generalized estimating equations
  • Multivariable generalized estimating equations

Main finding

As reported in the abstract

HbA1c at first adult visit
GroupValueMmol/mol
Early transferersmean 9.3 (SD 1.9) %78.2 ± 20.6
Late transferersmean 8.8 (SD 1.9) %72.9 ± 20.4

Value

Early transferersmean 9.3 (SD 1.9) %
Late transferersmean 8.8 (SD 1.9) %

Mmol/mol

Early transferers78.2 ± 20.6
Late transferers72.9 ± 20.4
  • Early transferers vs Late transferers: P = 0.01

Observational data: associations, not effects.

Further findings

Factors associated with higher adult-service HbA1c (multivariable generalized estimated equations (GEEs))

β (95% CI)P value
Transfer age (younger)−0.15 (−0.30 to −0.002)P = 0.047
Socioeconomic disadvantage0.58 (0.10–1.06)P = 0.02
Mean HbA1c in 36 months before transfer0.06 (0.04–0.07)P < 0.001

Gap between last pediatric and first adult visit

P < 0.001

Mean

OutcomeEarly transferersLate transferersP value
Socioeconomic disadvantage score at first adult visit976.8 (SD 101.7)992.8 (SD 81.1)P = 0.03

Original publication

Higher HbA1c Following Younger Age of Transfer From Pediatric to Adult Type 1 Diabetes Services: Data From the Australasian Diabetes Data Network (ADDN) Registry. Diabetes Care. Published 28 May 2026. doi:10.2337/dc25-3026

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

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