Correlation Between Kidney Function and Rehospitalization Within 90 Days in Heart Failure Patients

Heart failure is a global health problem with high rehospitalization rates. One potential risk factor contributing to rehospitalization is impaired kidney function, which is commonly found as a comorbidity in heart failure patients. The study aims to determine the relationship between kidney function, assessed by estimated Glomerular Filtration Rate (eGFR), and 90-day rehospitalization in patients with heart failure. This retrospective cohort study was conducted at Pelabuhan Cirebon Hospital. Subjects were heart failure patients from medical records between January 2024 and May 2024 who met the inclusion criteria. Kidney function data were calculated using the CKD-EPI formula, and patients were followed for 90 days to assess rehospitalization incidence. Analysis was performed using Cox proportional hazards regression. Results showed that patients with decreased kidney function (eGFR < 90 mL/min/1.73 m²) had higher rehospitalization rates within 90 days compared to patients with normal kidney function. This relationship was statistically significant, with a p-value of 0.024. Decreased kidney function is significantly associated with an increased risk of 90-day rehospitalization in heart failure patients. Regular evaluation of kidney function is essential to identify high-risk patients and potentially reduce rehospitalization rates.