Type 2 diabetes in Norway 2009–2021: Have declining incidence rates continued?
Authors' conclusion
The previously described decline in incidence of diagnosed type 2 diabetes during 2009-2014 was not sustained, and prevalence continued to increase throughout 2009-2021.
Study context
- Population
- Norwegian population with diagnosed T2D, 2009–2021, by age, sex, country of birth and education195,935 incident cases
- Outcome
- Incidence and prevalence of diagnosed T2D
- Follow-up
- 2009–2021
Methodological detailsregistry-based, Poisson regression and JoinPoint
- Registry-based
- Poisson regression and JoinPoint
Main finding
As reported in the abstract
- Incident T2D cases 2009–2021
- 195,935
- Overall incidence rate 2009
- 651 per 100,000 person-years
- Overall incidence rate 2021
- 530 per 100,000
- Prevalent cases 2009
- 165,432 (5.5% of the population)
- Prevalent cases 2021 (peak)
- 259017 (7.6%)
Observational data: associations, not effects.
Further findings
Subgroups by age, sex, country of birth and education
- Time trends largely consistent across age, sex, country of birth and education
- Lower education and born in Asia or Africa: substantially higher incidence and prevalence than higher education and born in Norway or other continents
Original publication
Type 2 diabetes in Norway 2009–2021: Have declining incidence rates continued? Diabet Med. Published 8 February 2026. doi:10.
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