Increasing Contribution of Adolescent Type 1 Diabetes Drives Incidence Rates in Poland - a 40-year-long Observational Study
Authors' conclusion
Over the past 40 years, the incidence of pediatric type 1 diabetes in Central Poland has increased significantly, though the rate is slowing. Most new cases occur in children 10 years old and older, so healthcare systems should adapt to young adults who are extensive users of new diabetes technologies.
Study context
- Population
- Children 0–14 years with new-onset T1D admitted 1983–2022 to reference centres for pediatric diabetes, Lodz Province, Central Poland
- Outcome
- Incidence and prevalence of pediatric T1D
- Follow-up
- 1983–2022
Methodological detailspopulation-based registry, 40-year
- Population-based registry
- 40-year
Main finding
As reported in the abstract
T1D incidence rate · 1983 to 2022
- Incidence 1983
- 3.29/100,000 (per 100,000; 95% CI 1.85-4.73)
- Incidence 2022 (per 100,000; 26.42-38.44)
- 32.43
- Increase
- tenfold
- Annual percentage change (4.99%-6.44%)
- 5.73%
- Annual percentage change 1983-2005, rapid (6.30-10.52%)
- 7.38%
- Annual percentage change 2005-2022, slower (−0.86-5.13%)
- 3.65%
Observational data: associations, not effects.
Further findings
| Outcome | P value |
|---|---|
| Incidence by age group0-4 years vs 5-9 and 10-14 years · significantly lower in 0-4-year-olds | P < 0.0001 |
Incidence by age group
- Incidence plateaued in 0-4-year-olds after 2007; consistently increased in older children
Seasonality of diagnosis
- Most new cases diagnosed in winter (December-February); mean difference from remaining seasons, % points (± 11.6; p < 0.0001)
- 29
T1D prevalence · 2022
- Prevalence 2022 (per 100,000; 163.18-191.24)
- 177.21/100,000
Original publication
Increasing Contribution of Adolescent Type 1 Diabetes Drives Incidence Rates in Poland - a 40-year-long Observational Study. Horm Res Paediatr. Published 17 April 2025. doi:10.
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