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Duration of Type 2 Diabetes and Incidence of Cancer: An Observational Study in England.

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posted on 2023-10-06, 09:34 authored by Francesco Zaccardi, Suping Ling, Karen Brown, Melanie Davies, Kamlesh Khunti

Objective

To investigate the association between duration of type 2 diabetes and cancer incidence.

Research design and methods

In the Clinical Practice Research Datalink database, we identified 130,764 individuals with type 2 diabetes aged ≥35 years at diagnosis who were linked to hospital and mortality records. We used sex-stratified Royston-Parmar models with two time scales to estimate incidence rates of all cancers, the four commonest cancers in the United Kingdom (colorectal, lung, prostate, breast), and the obesity-related cancers (e.g., liver, ovary) between 1 January 1998 and 14 January 2019, by age and diabetes duration.

Results

During 1,089,923 person-years, 18,977 incident cancers occurred. At the same age, rates of all cancers in men and women did not vary across durations ranging from diagnosis to 20 years; conversely, for any duration, there was a strong, positive association between age and cancer rates. In men, the rate ratio (95% CI) comparing 20 with 5 years of duration was 1.18 (0.82-1.69) at 60 years of age and 0.90 (0.75-1.08) at 80 years; corresponding ratios in women were 1.07 (0.71-1.63) and 0.84 (0.66-1.05). This pattern was observed also for the four commonest cancers. For obesity-related cancers, although rates were generally higher in individuals with a higher BMI, there was no association with duration at any level of BMI.

Conclusions

In this study, we did not find evidence of an association between duration of type 2 diabetes and risk of cancer, with the higher risk observed for longer durations related to ageing.

Funding

Hope Against Cancer (grant number: RM60G0690)

History

Author affiliation

Diabetes Research Centre, University of Leicester

Version

  • AM (Accepted Manuscript)

Published in

Diabetes care

Pagination

dc231013

Publisher

American Diabetes Association

issn

0149-5992

eissn

1935-5548

Copyright date

2023

Available date

2023-10-06

Spatial coverage

United States

Language

eng

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