Type 1 diabetes

Detectable C-Peptide and Diabetic Ketoacidosis Risk in Type 1 Diabetes

Diabetes CarePublished Secondary analysis of the DCCT randomised trial data

Primary result · DKAResult — go to the resultHazard ratio 0.07 95% CI 0.01–0.48

Authors' conclusion

Endogenous insulin production was significantly associated with lower DKA risk

Study context

Population
Participants with T1D in the Diabetes Control and Complications Trial; 53% male, median age 27 years
Participants
1,441 participants
Comparison
Detectable stimulated C-peptide vs C-peptide ≤0.2 nmol/L
Primary endpoint
DKA incidence (recurrent DKA events)
Follow-up
average 6.5-year follow-up
Methodological detailspublicly available data repository, Andersen-Gill models for recurrent events, time-dependent covariates, crude and adjusted models
  • Publicly available data repository
  • Andersen-Gill models for recurrent events
  • Time-dependent covariates
  • Crude and adjusted models

Primary result

DKA

Hazard ratio

0.07

95% CI 0.01–0.48

P = 0.007

Events by treatment group

C-peptide >0.2 nmol/L

1

events

C-peptide ≤0.2 nmol/L

99.44%

179 events

C-peptide >0.2 nmol/Lvs C-peptide ≤0.2 nmol/L
HR 0.07 (95% CI 0.01–0.48); P = 0.007

As reported in the abstract

Participants with diabetic ketoacidosis (DKA)
129 (9%), 180 events

Original publication

Detectable C-Peptide and Diabetic Ketoacidosis Risk in Type 1 Diabetes. Diabetes Care. Published 9 July 2026. doi:10.2337/dc26-0220

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