Type 2 Diabetes Complications Rise Sharply Over Time

A large U.S. real-world study presented at the 2026 annual meeting of the European Association for the Study of Diabetes reports that people newly diagnosed with type 2 diabetes face a steep cumulative risk of chronic kidney disease, heart failure, or death over time. The findings come from the CALOR observational study program and include health records from 1,617,508 people diagnosed with type 2 diabetes between January 2010 and March 2024. Participants had an average age of 59, and many already had major cardiometabolic risk factors at diagnosis: about 72% had unhealthy cholesterol or other blood-fat levels, and 68% had high blood pressure.

The study found that within five years of a type 2 diabetes diagnosis, the combined risk of chronic kidney disease, heart failure, or death was about 33%. By 10 years, it rose to 55%. Kidney disease was more likely to appear first: the five-year risk of developing chronic kidney disease first was 19%, compared with 8.3% for heart failure. The complications were also closely linked. Among patients who developed heart failure first, 42% were at risk of later developing chronic kidney disease within five years; among those who developed kidney disease first, the five-year risk of heart failure was 23%.

The main clinical message is that type 2 diabetes care needs to be broad from the start, not limited to glucose control alone. Professor Naveed Sattar of the University of Glasgow, who co-led the work, emphasized early and thorough management, including blood pressure, cholesterol, body weight, kidney health, and cardiovascular risk. Because this was an observational study using health records, it cannot prove diabetes directly caused every complication, and body mass index data were available for only 13% of participants. Still, the scale of the dataset makes the findings useful for clinicians and policymakers: serious kidney and heart outcomes accumulate quickly after diagnosis, so routine monitoring and prevention should begin early.