Diabetes is one of the most common chronic diseases, affecting approximately 1 in 9 people worldwide.

But 44% of people ages 15 and older who have diabetes don't realize they have it, according to a new study. MORE: Are the Sunday scaries ruining your weekends? Here's how to cope

The research, published Monday in The Lancet , used data from a study that looked at gaps in diabetes care in 204 countries between 2000 and 2023. The Lancet study found that despite advances in the past 20 years, diabetes is still significantly underdiagnosed and undertreated.

"These findings highlight the urgent need for enhanced strategies … to improve the detection, treatment, and management of diabetes worldwide," the researchers wrote.

Type 2 diabetes, characterized by insulin resistance, makes

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