03/11/2025
Exploring anemia burden and treatment patterns in patients with chronic kidney disease and diabetes
by
Truveta Research
Text graphic with title and subhead Anemia among patients with chronic kidney disease and diabetes anemia burden and treatment research using EHR data
In patients with CKD and diabetes, anemia prevalence and severity increased from stage 1 to stage 5, with overall anemia rising from 46.4% to 85.0% and severe anemia from 2.5% to 11.8%
Erythropoiesis-stimulating agents (ESAs) and IV iron use rose as hemoglobin levels dropped, though with distinct stage-specific patterns and evidence of flexible application of guideline thresholds.
Anemia is a shortage of healthy, oxygen-carrying red blood cells, which leads to fatigue, weakness, and shortness of breath. It is a common complication of chronic kidney disease (CKD), particularly among those with diabetes (1, 2). is the leading cause of CKD and together they create a compounded risk for both the development and severity of anemia (3, 4). In CKD, the kidneys lose their ability to produce erythropoietin, a hormone essential for red blood cell production (1).
Anemia in patients with both CKD and diabetes significantly increases the risk of cardiovascular disease, accelerates the progression of kidney failure, and is associated with higher rates of hospitalization and mortality (7–9). Effective management is therefore essential, and current clinical practice recommendations are outlined in the Kidney Disease: Improving Global Outcomes (KDIGO) guidelines (10).
According to the KDIGO guidelines, anemia in patients with CKD is diagnosed when hemoglobin levels fall below 13 g/dL in men or 12 g/dL in women (7, 10). If iron deficiency is present, oral or is the recommended first-line treatment. If anemia persists despite adequate iron stores and hemoglobin remains below 10 g/dL, erythropoiesis-stimulating agents (ESAs) may be initiated to support red blood cell production (10, 11).
In this report, we examined hemoglobin lab results from patients with CKD and type 1 or type 2 to describe the prevalence and severity of anemia across CKD stage, dialysis status, and patient characteristics. We further evaluated ESA and IV iron use following low hemoglobin values to assess how treatment patterns vary in relation to clinical guidelines and disease stage. The combination of the linked EHR and medical claims data can provide a detailed and more complete view of patient care.
Methods
We used a subset of Truveta Data to identify adults aged 18 years and older with evidence of CKD and type 1 or type 2 diabetes (henceforth referred to as diabetes) between January 2019 and August 2025. CKD and diabetes were defined by the presence of at least one diagnostic code for CKD or diabetes, identified from EHR or medical/pharmacy claims data, recorded prior to the hemoglobin lab. Patients were required to have at least one hemoglobin lab, with continuous medical and pharmacy enrollment for at least six months prior to the test and extending through 90 days afterward. To ensure continuous care, patients were also required to have at least one healthcare encounter in the year preceding the hemoglobin lab.
To ensure that anemia could be attributed to CKD, we excluded hemoglobin lab results if patients had a diagnosis of anemia due to acute blood loss or underwent surgery within 90 days before or 7 days after the test. In addition, patients with a diagnosis of cancer at any time, or who had a live birth recorded within 9 months of their hemoglobin lab were excluded.
Anemia severity classification
Anemia severity was categorized based on hemoglobin levels using s*x-specific thresholds (12):
Severe: 1 indicates higher odds of worse anemia compared with the reference group, while an OR < 1 indicates lower odds. When the confidence interval (grey bars in the image below) crosses 1, the association is not statistically significant.
Patients with COPD (OR = 1.08, p