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J-shaped association between serum glucose potassium ratio and prognosis in heart failure with preserved ejection fraction with stronger predictive value in non-diabetic patients

Liang Shan,Keyang Zheng,W. Dai,Peng Hao,Yintang Wang

Published 2024 in Scientific Reports

ABSTRACT

Background: The relationship between serum glucose/potassium ratio (GPR) and the adverse outcomes in patients with heart failure with preserved ejection fraction (HFpEF) has not been completely clarified. Methods: Patients were included from the American cohort of the Treatment of Preserved Cardiac Function Heart Failure with an Aldosterone Antagonist (TOPCAT) trial. The primary endpoint was the composite of cardiovascular mortality, aborted cardiac arrest, and hospitalization for HF. The Cox regression models were applied to calculate the hazard ratio (HR) and 95% confidence interval (CI) to examine the relationship between GPR and prognosis. Restricted cubic spline (RCS) curves were performed to explore the nonlinear relationship between GPR and the primary endpoint. Receiver Operating Characteristic (ROC) curves were constructed, and the areas under the curves (AUCs) for GPR and its components were compared using the DeLong test. Subgroup analysis and interaction effect were also explored. Results: A total of 1749 HFpEF patients were included. During the follow-up, 514 (29.4%) patients reached the primary outcome. An increase in GPR was independently associated with a higher risk in the primary endpoint [Tertile 3 vs. Tertile 1: HR (95% CI), 1.35 (1.07–1.70), P = 0.012] and HF hospitalization [Tertile 3 vs. Tertile 1: HR (95% CI), 1.57 (1.20–2.05), P = 0.001]. RCS curve showed a J-shape trend between GPR and primary endpoint (non-linear P = 0.002). The AUC for GPR was superior to that of the glucose and potassium (De long test P < 0.05). Additionally, the prognostic value of GPR was stronger in patients without diabetes and with less severe heart failure symptoms (P interaction < 0.05). Conclusion: A J-shaped relationship was existed between GPR levels and the primary outcome in HFpEF patients. An increased GPR was an independent predictor of poor prognosis in HFpEF patients, especially in non-diabetic patients and those with less severe heart failure symptoms.

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