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Prevalence, incidence and mortality of type 1 and type 2 diabetes in Denmark 1996–2016

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Carstensen, Bendix, Rønn, Pernille Falberg, Jørgensen, Marit Eika·2020·BMJ Open Diabetes Research & Care
DOI 10.1136/bmjdrc-2019-001071PMC PMC7265004
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Abstract

Introduction: The objective of this study was to give an overview of prevalence, incidence and mortality of type 1 (T1D) and type 2 diabetes (T2D) in Denmark, and their temporal trends. Research design and methods: We constructed a diabetes register from existing population-based healthcare registers, including a classification of patients as T1D or T2D, with coverage from 1996 to 2016. Using complete population records for Denmark, we derived prevalence, incidence, mortality and standardized mortality ratio (SMR). Results: The overall prevalence of diabetes at 2016 was 0.5% for T1D and 4.4% for T2D, with annual increases since 1996 of 0.5% for T1D and 5.5% for T2D. Incidence rates of T1D decreased by 3.5% per year, with increase for persons under 25 years of age and a decrease for older persons. T2D incidence increased 2.5% per year until 2011, decreased until 2014 and increased after that, similar in all ages. The annual decrease in mortality was 0.3% for T1D and 2.9% for T2D. The mortality rate ratio between T1D and T2D was 1.9 for men and 1.6 for women. SMR decreased annually 2% for T1D and 0.5% for T2D. Conclusions: Incidence and prevalence of diabetes is increasing, but mortality among patients with diabetes in Denmark is decreasing faster than the mortality among persons without diabetes. T1D carries a 70% higher mortality than T2D.

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  • In Denmark, mortality in people with type 1 diabetes mellitus was 28.5 per 1,000 persons for men and 24.3 for women in 2016 aged 60-69 years, and 175.2 for men and 158.8 for women aged ≥80 years.

    “In Denmark, mortality in people with T1DM was 28.5 per 1,000 persons for men and 24.3 for women in 2016 aged 60–69 years, and 175.2 for men and 158.8 for women aged ≥80 years14.”

    From The epidemiology of type 1 diabetes mellitus in older adults (2025) · cites this paper as [14]

    The Results > Mortality and SMR section reports age-specific mortality for Danish patients with type 1 diabetes and distinguishes men from women. However, the figure is evaluated as of 1 January 2015, and our copy does not give the four claimed rates for the specified age groups in 2016 (searched the exact numbers and age-specific rates). (LLM, conf=0.78)

    Experimental — accuracy not yet measured

  • In Denmark, type 1 diabetes mellitus incidence in 2016 was 13 per 100,000 among men and 8 per 100,000 among women aged 60-69 years.

    “In Denmark, an analysis of registry data reported incidences of 13 and 8 per 100,000 individuals among men and women, respectively, aged 60–69 years in 2016 (ref. 14)”

    From The epidemiology of type 1 diabetes mellitus in older adults (2025) · cites this paper as [14]

    The Results > Incidence section reports Danish type 1 diabetes incidence by age and sex and says rates were higher in men. It does not give the claimed 2016 rates of 13 and 8 per 100,000 for people aged 60–69; the figure described there presents age-specific rates as of January 2015. (LLM, conf=0.83)

    Experimental — accuracy not yet measured

  • In Denmark, type 1 diabetes mellitus incidence in 2016 was higher in those aged 60-69 years than in those aged 70-79 years and ≥80 years.

    “this figure was higher than the incidence reported in those aged 70–79 years (5 for men and 10 for women per 100,000 individuals) and ≥80 years (0 for men and 2 for women per 100,000 individuals).”

    From The epidemiology of type 1 diabetes mellitus in older adults (2025) · cites this paper as [14]

    The Conclusions (page unavailable) say that type 1 diabetes incidence declined after about age 20 in women and age 40 in men, supporting the general comparison of older age groups. The Results > Incidence (page unavailable) describe age-specific rates as of January 2015, but the available text does not give the claimed rates for ages 70–79 and ≥80 or establish the comparison specifically for 2016. (LLM, conf=0.78)

    Experimental — accuracy not yet measured

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Cites

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Cited by

Sorted by citations

Authors
Carstensen, B., Rønn, P. F., & Jørgensen, M. E.
Affiliations
  • Steno Diabetes Center Copenhagen (DK)
  • University of Southern Denmark (DK)
Corresponding author
Jørgensen, Marit Eika
ORCID
Venue
BMJ Open Diabetes Research & Care
Publisher
BMJ
Published
2020-05
Volume
8
Issue
1
Pages
e001071
ISSN
2052-4897 (ISSN-L)
DOI
10.1136/bmjdrc-2019-001071
PMC
PMC7265004
OpenAlex
W3030652212
Cited by
250
References
2
Citations by year
2026: 24 · 2025: 45 · 2024: 51 · 2023: 52 · 2022: 46 · 2021: 26 · 2020: 6
FWCI
5.01
Type
journal article
Language
en
Open access
Licence
Locations
  • BMJ Open Diabetes Research & Care (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • University of Southern Denmark Research Portal (University of Southern Denmark) (publishedVersion, cc-by-nc)
Funders
Sanofi Aventis
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Diabetes and associated disorders
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
type 1 diabetes, type 2 diabetes, diabetes prevalence, diabetes incidence, diabetes mortality, temporal trends, standardized mortality ratio, diabetes registry, Denmark
MeSH terms
Aged, Denmark, Diabetes Mellitus, Type 1, Diabetes Mellitus, Type 2, Female, Humans, Male, Incidence, Prevalence

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