Type 2 & other diabetes

Inequalities in cancer mortality trends in people with type 2 diabetes: 20 year population-based study in England

DiabetologiaPublished Population-based cohort study

Authors' conclusion

In contrast to the declines in all-cause mortality rates at all ages, the cancer burden has increased in older people with type 2 diabetes, especially for colorectal, pancreatic, liver and endometrial cancer. Tailored cancer prevention and early detection strategies are needed to address persistent inequalities in the older population, the most deprived and smokers.

Study context

Population
Individuals aged ≥35 years with newly diagnosed T2D in the Clinical Practice Research Datalink, 1 January 1998 to 30 November 2018, Englandmedian follow-up 8.4 years
Participants
137,804 individuals
Outcome
Trends in all-cause, all-cancer and cancer-specific mortality rates by age, gender, ethnicity, socioeconomic status, obesity and smoking status
Follow-up
1998–2018
Methodological detailsPoisson regression, Joinpoint regression, standardised mortality ratios vs general population
  • Poisson regression
  • Joinpoint regression
  • Standardised mortality ratios vs general population

Main finding

As reported in the abstract

Cancer mortality rate trends by age (AAPC)

Cancer mortality AAPC, 55-year-olds

−1.4%

95% CI −1.5, −1.3

Cancer mortality AAPC, 65-year-olds

−0.2%

−0.3, −0.1

Cancer mortality AAPC, 75-year-olds

1.2%

0.8, 1.6

Cancer mortality AAPC, 85-year-olds

1.6%

1.5, 1.7

Observational data: associations, not effects.

Further findings

Cancer mortality AAPC by subgroup

Women vs men
1.5% vs 0.5%
Least deprived vs most deprived
1.5% vs 1.0%
Morbid obesity vs normal body weight
5.8% vs 0.7%
All these stratified subgroups showed upward trends
Increasing rates in White ethnicity and former/current smokers; downward trends in other ethnic groups and non-smokers
Persistent inequalities by gender and deprivation; widening disparities by smoking status

Cancer-specific mortality trends

Constant upward trends for pancreatic, liver and lung cancer at all ages, colorectal at most ages, breast at younger ages, prostate and endometrial at older ages

Cancer mortality vs general population · whole study period

More than 1.5-fold increased risk of colorectal, pancreatic, liver and endometrial cancer mortality in T2D

Original publication

Inequalities in cancer mortality trends in people with type 2 diabetes: 20 year population-based study in England. Diabetologia. Published 24 January 2023. doi:10.1007/s00125-022-05854-8

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