Type 2 Diabetes Linked to Significantly Higher Risk of Deadly Cancers, Study Finds
New research suggests individuals with type 2 diabetes face an increased likelihood of developing several aggressive forms of cancer, including breast, bowel, and lung tumors.
Individuals with type 2 diabetes face a substantially higher risk of developing a range of deadly cancers, according to concerning research from Danish scientists. The study indicates that women with the condition are 22% more likely to develop cancer overall, while men face a 12% increased risk compared to those without diabetes.
The elevated risk is particularly pronounced for cancers associated with obesity, such as kidney, pancreatic, and liver cancers. Men with type 2 diabetes were found to be 45% more likely to develop these specific cancers, and women faced a 30% higher risk. Additionally, bowel cancer was approximately 17% more common among diabetes sufferers, and lung cancer rates were up to 25% higher.
These findings add to a growing body of evidence connecting obesity, type 2 diabetes, and cancer, as all three conditions are becoming increasingly prevalent. Cancer is already a leading cause of death for individuals with type 2 diabetes in Britain. This trend is mirrored in younger populations, where cancer diagnoses are rising faster than in any other age group, a phenomenon some experts link to increasing rates of obesity.
For the study, researchers analyzed nationwide health records from Denmark, tracking cancer diagnoses among individuals with and without type 2 diabetes between 1996 and 2022. Over this 27-year period, 75,540 cancer cases were identified among participants with diabetes and 635,323 among those without.
Specific patterns emerged, with women with type 2 diabetes showing an 8% increased risk of breast cancer, the most common cancer affecting women. For men, bowel cancer was 17% more likely, though they also had a 19% lower risk of prostate cancer compared to men without the condition. Notably, lung cancer rates were around 25% higher in women with type 2 diabetes between 2010 and 2022, a significant reversal from earlier years when they were less likely to develop the disease.
Authors of the study emphasize the importance of prioritizing cancer prevention for individuals with type 2 diabetes, especially for common obesity-related cancers like colorectal and post-menopausal breast cancer. While cardiovascular and kidney disease prevention remain key priorities in diabetes care, the researchers suggest that cancer may require greater attention as outcomes for other complications improve.
It is important to note that the study highlights an association between type 2 diabetes and cancer, not necessarily a direct causal link. The research could not fully account for crucial risk factors such as body weight, smoking status, alcohol consumption, and physical activity levels, which may influence the observed differences.
Experts recommend maintaining a healthy weight, regular exercise, and a balanced diet as critical lifestyle changes that can reduce the risk of both type 2 diabetes and cancer. Approximately nine in ten cases of type 2 diabetes are linked to excess weight, and lifestyle changes could prevent around four in ten cases. Obesity is a significant preventable cause of cancer, linked by the World Health Organization to at least 13 types of the disease.