Demographic Change in Prevalent Type 1 Diabetes Adult Population, and Association of Risk Factors With Comorbidities and Mortality—Results From the Finnish Diabetes Control Study FinDiCon
Authors' conclusion
The proportion of elderly with T1D is increasing, with no concomitant increase in vascular events. Insulin pump therapy has become more common without a concomitant increase in ketoacidosis incidence. HbA1c and LDL-c levels improved during the study. Finnish data indicate a shift in T1D demographics, characterised by improved survival, while rates of diabetes-specific comorbidities remain stable.
Study context
- Population
- Finnish adults with T1D, 2014–2021, identified from national health care registers
- Participants
- 35,574 adults
- Outcome
- Characteristics of adults with T1D, 2014 to 2021
- Follow-up
- 2014–2021
Methodological detailsnationwide, national health care registers linked with hospital laboratory data, Cox regression
- Nationwide
- National health care registers linked with hospital laboratory data
- Cox regression
Main finding
As reported in the abstract
- Proportion aged over 70 years increased
- 7.1% to 12.4%
- Proportion of insulin pump users increased
- 10% to 17%
- Mean haemoglobin A1c (HbA1c) decreased
- 1.7 mmol/mol (0.2%)
- Mean LDL-C decreased
- 0.2 mmol/L (7.7 mg/dL)
- Proportion with HbA1c > 75 mmol/mol (> 9.0%) reduced slightly; more prominent in insulin pump users (9%-points)
- 4%-points
Observational data: associations, not effects.
Further findings
Prevalence of chronic kidney disease (CKD) · 2014–2021
- CKD prevalence increased (p-trend < 0.001)
- 140 (95% CI 136-145) to 168 (95% CI 163-172) per 1000 persons
Associations with mortality (Cox regression)
- CKD and vascular disease: multifold increase in mortality risk; lipid-lowering and antihypertensive medications reduced this risk (p < 0.001 for all)
Original publication
Demographic Change in Prevalent Type 1 Diabetes Adult Population, and Association of Risk Factors With Comorbidities and Mortality—Results From the Finnish Diabetes Control Study FinDiCon. Diabetes Obes Metab. Published 9 March 2026. doi:10.
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