We know from the literature and in practice that type 2 diabetes (T2D) is one of the most common risk factors for developing chronic kidney disease (CKD). How prevalent is this overlap, and are certain patients more at risk than others?
Dr. McGill: That’s correct, in fact, 20% to 40% of people with T2D have identifiable CKD, and the rest are at risk for developing CKD in the future. All patients with T2D should recognize that risk and undergo annual screening for CKD. If an individual has prediabetes, then step up the screening to perhaps twice a year to see if the person has progressed. At that point, we can think about intervening with a medication to prevent the onset of diabetes, particularly if the patient is unable to adopt significant lifestyle changes.
In your day-to-day practice, what therapeutic approach do you take in managing patients with T2D and CKD?
Dr. McGill: The earliest and arguably the most important treatment for the care of CKD in T2D is glucose control. Establishing and maintaining blood glucose levels near the normal range is our strongest weapon for preventing CKD. Another treatment avenue is controlling blood pressure. The American Diabetes Association and other groups recommend that blood pressure be less than 130/80 mm Hg. It is critical that we treat hypertension effectively to achieve those numbers.
We also have therapies, such as the SGLT2 inhibitors, that offer protection from progression of CKD and from hospitalization for heart failure. Deployment of these newer agents is important for people who have more advanced diabetes or other serious health conditions.
What is the rate of disease progression, related complications, or even mortality for these patients?
Dr. McGill: People with CKD and T2D are at risk for many things. One risk is progression of kidney disease all the way to end-stage kidney disease, which requires dialysis or transplantation. Another huge risk is cardiovascular events such as myocardial infarction (MI) and stroke.
Persons with kidney disease, for reasons we don't understand, are at higher risk of MI and stroke than people who do not have kidney disease. Therefore, the risks of early mortality and events that adversely affect quality of life are greatly increased.
Can you please discuss the economic burdens associated with T2D and CKD, and whether any interventions are in place to help offset those costs?
Dr. McGill: Diabetes itself is wickedly expensive. We have excellent treatments for diabetes today, but they are very costly. The best approach for the prevention of diabetes is to be screened. When a patient presents with prediabetes, it’s important that they take important measures, such as weight loss, exercising 150 minutes per week, or reducing 500 calories a day from their diet, all of which have been shown to forestall the onset of diabetes.
Once diabetes develops, achieving near-normal glucose control can either be very inexpensive with one or more generic drugs, or it can be terribly expensive with the newer branded drugs. Both options can help with the achievement of near-normal glucose levels, but the newer drugs are better for weight loss and provide protection from heart and kidney disease.