D iabetes and its related complications are major contributors to morbidity and mortality worldwide. 1-3 Indigenous populations in Canada and around the world are disproportionately affected by diabetes owing to the complex relations among colonization, social disadvantage, stress, trauma and metabolic health. 4-7 In addition to our own work showing persistently higher rates of peripheral vascular disease, stroke, cardiac disease, renal dysfunction and ophthalmologic complications in Ontario First Nations, 8-12 other Canadian and international studies also showed higher complication rates in diverse Indigenous populations. 6,7,13-15 Glycemic control is fundamental to the management of diabetes and the prevention of complications. 16 Glycated hemoglobin (A 1c) is a reliable way to estimate the average level of glucose in the blood. 17 Since A 1c levels higher than 7.0% have been associated with an increased risk of microvascular complications, 18-20 treatment guidelines suggest A 1c should be measured every 3-6 months to ensure that glycemic goals are being met or maintained. 21 Since people with diabetes also have an elevated risk for cardiovascular disease, 22-24 management and control of cardiovascular risk factors, particularly lipids such as low-density lipoprotein (LDL) cholesterol, are also important. 25-27 Guidelines further recommend that a full lipid profile be measured every 1-3 years, depending on cardiovascular risk, and suggest that LDL be consistently less than 2.0 mmol/L. 28 Control of A 1c and lipids has been shown to be associated with reduced morbidity and mortality in patients with diabetes. 18,29-32 One possible reason for the high burden of complications among Indigenous people with diabetes may be failure to achieve control of these 2 key clinical parameters. We examined differences between Status First Nations people with diabetes in Ontario and all other Ontario residents with diabetes in rates of monitoring of A 1c and lipids, achievement of targets for A 1c and LDL outlined in clinical guidelines, and patterns of medication use to help attain these targets.