A new study shows that among seniors with diabetes, only 1 in 3 meet the American Diabetes Association’s guidelines for key measures for control.

The study, conducted by researchers at the Johns Hopkins Bloomberg School of Public Health, included 1,600 diabetes patients over the age of 65. Researchers evaluated whether those seniors met the ADA’s three key measures for good diabetes control: blood sugar, blood pressure and cholesterol levels.

The results found that only one-third of seniors met the ADA’s guidelines, which some experts consider too demanding for seniors. Researchers also studied the patients using less strict measures and found that many still did not have the disease in check.

The study’s authors also found racial disparities, particularly among women, in how well seniors manage their diabetes. Black women were much less likely than white women to have control of their blood pressure, blood sugar, and cholesterol levels, the researchers wrote.

The full study appears in the July issue of Diabetes Care.

This article originally appeared on McKnight's