A longitudinal cohort study describing childhood type 1 diabetes incidence and prevalence rates in British Columbia, Canada over 27 years (1997–2023)
Authors' conclusion
We report a stabilization of type 1 diabetes incidence and prevalence, along with the absence of pandemic-related increases. These trends may in part reflect demographic changes in British Columbia's paediatric population, including a growing proportion of children from immigrant backgrounds with historically lower type 1 diabetes risk. Unfortunately, our data sources do not include ethnicity, limiting our ability to explore these patterns directly. This study will support the optimization of resource allocation and inform healthcare improvement and long-term management of childhood type 1 diabetes.
Study context
- Population
- Children and youth <20 years with T1D diagnosed 1997–2023, British Columbia, Canada
- Outcome
- Incidence per 100,000 and prevalence per 100 of T1D, trends, cyclicity (4-, 5- or 6-year) and change during the COVID-19 pandemic
- Follow-up
- 1997–2023
Methodological detailslinked population-level databases, validated case-finding and diabetes differentiating algorithm, JoinPoint regression
- Linked population-level databases
- Validated case-finding and diabetes differentiating algorithm
- JoinPoint regression
Main finding
As reported in the abstract
- Incidence increased markedly until 2008, then declined very gradually, with similar patterns across age and sex
- Incidence higher in boys, highest at age 5–14 years, lowest at 15–19 years
- After 2012, prevalent cases stabilized in those <10 and decreased in those >10 years
- No evidence of cyclical trends or changes in incidence or prevalence during or after the COVID-19 pandemic
Observational data: associations, not effects.
Original publication
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