Factors Associated with Hospital Readmission within 90 Days for Acute Heart Failure at Damnoen Saduak Hospital, Ratchaburi, Thailand

Abstract

This retrospective cohort study aimed to investigate factors associated with rehospitalization due to acute heart failure within 90 days at Damnoen Saduak Hospital, Ratchaburi Province. Data were collected retrospectively from medical records of patients aged 15 years and older diagnosed with acute heart failure. Patients were divided into two groups: those who were rehospitalized and those who were not, totaling 238 individuals. The case record form collected clinical data, laboratory results, and treatment outcomes. Data were analyzed using multivariate logistic regression, and results were presented as odds ratios (ORs) with 95% confidence intervals (CIs).

The study found that 42 patients (17.65%) were rehospitalized, with an average time to rehospitalization of 39 days. Factors associated with rehospitalization included gender, systolic blood pressure, hemoglobin levels, hematocrit levels, troponin I levels, coronary artery disease, cardiomyopathy, and the use of spironolactone (p = 0.03, <0.01, <0.01, 0.03, 0.02, and 0.02, respectively). After adjusting for these variables, spironolactone was identified as the only protective factor (OR 0.28; 95% CI 0.09–0.87, p = 0.03). Thus, spironolactone can prevent rehospitalization within 90 days for patients with acute heart failure and should be prescribed for all eligible patients upon discharge.