Association of Prediabetes With CKD Progression and Adverse Cardiovascular Outcomes: An Analysis of the CRIC Study

• Published in: The journal of clinical endocrinology and metabolism Vol. 105; no. 4; pp. e1772 - e1780
• Main Authors: Neves, João Sérgio, Correa, Simon, Baeta Baptista, Rute, Bigotte Vieira, Miguel, Waikar, Sushrut S, Mc Causland, Finnian R
• Format: Journal Article
• Language: English
• Published: US Oxford University Press 01-04-2020; Copyright Oxford University Press
• Subjects: Adult; Aged; Antidiabetics; Biomarkers - analysis; Blood Glucose - analysis; Cardiovascular Diseases - etiology; Cardiovascular Diseases - mortality; Cardiovascular Diseases - pathology; Cerebral infarction; Congestive heart failure; Coronary artery disease; Creatinine; Diabetes; Diabetes mellitus; End-stage renal disease; Female; Follow-Up Studies; Glomerular filtration rate; Glycated Hemoglobin - analysis; Hemoglobin; Humans; Kidney diseases; Male; Middle Aged; Mortality; Myocardial infarction; Online Only; Portugal - epidemiology; Prediabetic State - physiopathology; Prognosis; Prospective Studies; Proteinuria; Renal insufficiency; Renal Insufficiency, Chronic - complications; Renal Insufficiency, Chronic - epidemiology; Risk factors; Survival Rate; Young Adult; Portugal; chronic kidney disease; cardiovascular outcomes; renal outcomes; diabetes; prediabetes; all-cause mortality
• ISSN: 0021-972X; 1945-7197
• DOI: 10.1210/clinem/dgaa017

Abstract
Purpose
Despite our understanding of diabetes as an established risk factor for progressive kidney disease and cardiac complications, the prognostic significance of prediabetes in patients with chronic kidney disease (CKD) remains largely unknown.
Methods
Participants of the Chronic Renal Insufficiency Cohort (CRIC) were categorized as having normoglycemia, prediabetes, or diabetes according to fasting plasma glucose, glycated hemoglobin A1c (HbA1c), and treatment with antidiabetic drugs at baseline. Unadjusted and adjusted proportional hazards models were fit to estimate the association of prediabetes and diabetes (versus normoglycemia) with: (1) composite renal outcome (end-stage renal disease, 50% decline in estimated glomerular filtration rate to ≤ 15 mL/min/1.73 m2, or doubling of urine protein-to-creatinine ratio to ≥ 0.22 g/g creatinine); (2) composite cardiovascular (CV) outcome (congestive heart failure, myocardial infarction or stroke); and (3) all-cause mortality.
Results
Of the 3701 individuals analyzed, 945 were normoglycemic, 847 had prediabetes and 1909 had diabetes. The median follow-up was 7.5 years. Prediabetes was not associated with the composite renal outcome (adjusted hazard ratio [aHR] 1.13; 95% confidence interval [CI], 0.96–1.32; P = 0.14), but was associated with proteinuria progression (aHR 1.23; 95% CI, 1.03–1.47; P = 0.02). Prediabetes was associated with a higher risk of the composite CV outcome (aHR 1.38; 95% CI, 1.05–1.82; P = 0.02) and a trend towards all-cause mortality (aHR 1.28; 95% CI, 0.99–1.66; P = 0.07). Participants with diabetes had an increased risk of the composite renal outcome, the composite CV outcome, and all-cause mortality.
Conclusions
In individuals with CKD, prediabetes was not associated with composite renal outcome, but was associated with an increased risk of proteinuria progression and adverse CV outcomes.