A large-scale study conducted in Germany has demonstrated that type 1 diabetes in children can be detected early through routine blood screening before symptoms or medical emergencies develop, prompting calls for broader screening efforts beyond families with a history of the disease.

Researchers tested more than 220,000 children during standard pediatric visits, analyzing small blood samples for the presence of at least two types of islet autoantibodies—immune markers indicating the body’s immune system is attacking the pancreas. Children testing positive but with normal blood glucose levels were identified as being in stage 1 of type 1 diabetes, allowing for early intervention. Families were provided with education and access to specialized diabetes centers for ongoing monitoring.

Of the children screened, about 590 (0.3%) were found to have early-stage type 1 diabetes. Over the course of the study, 212 of those children progressed to stage 3, the point at which insulin treatment becomes necessary. The researchers reported a 36.2% chance that children diagnosed at early stages would develop clinical type 1 diabetes within five years.

Significantly, the study found that progression from early detection to full disease occurred at similar rates in children regardless of whether they had a family history of type 1 diabetes. This challenges previous assumptions that screening should primarily target high-risk families and suggests that more generalized population screening could be beneficial.

Experts involved in the study emphasized that early detection represents a crucial advance in managing type 1 diabetes, which often goes unrecognized until children experience symptoms such as excessive thirst, weight loss, and fatigue. These symptoms can quickly lead to diabetic ketoacidosis, a severe and potentially life-threatening emergency.

Esther Latres from Breakthrough T1D, one of the organizations funding the research, highlighted the potential impact of early screening on altering the disease’s trajectory. Similarly, independent commentators from Indiana University School of Medicine noted in an accompanying editorial that the long-held belief that early-stage type 1 diabetes could not be reliably identified is no longer valid. They called for urgent consideration of universal screening programs given the evidence.

The findings, published in JAMA, point to a shift in how pediatric type 1 diabetes might be approached, with early identification offering an opportunity for closer monitoring, timely intervention, and improved outcomes for affected children.