Frequency and Risk Factors of Unplanned 30-Day Readmission After Open Heart Surgeries: A Retrospective Study in a Tertiary Care Center

Abstract

Background: Unplanned 30-day readmission post-cardiac surgery imposes higher risks for complications, increased costs, and unfavorable events for the care provider and patient. This study was to determine the unplanned readmission rate, determinants, and most common events within 30 days post-cardiac surgery. Recommendations to prevent or minimize these complications are included. Methods: Setting and design – a retrospective record review was conducted among all adult patients, who underwent open heart surgery between 2010 and 2020 at King Abdulaziz University Hospital (KAUH), Jeddah, Kingdom of Saudi Arabia. Using Google Forms, we manually collected data from hospital records. Statistical analysis used: binomial logistic regression model (using the backward stepwise method). Regression outcomes were expressed as odds ratios (ORs) and 95% CIs. A P-value of < 0.05 indicated statistical significance. Results: Among 400 patients who underwent cardiac surgery, 343 patients were included in the study, including 53 unplanned readmissions, which was a rate of 16.3% (95% CI, 12.8 to 20.6%). The most frequently reported reasons for readmission were sternal wound infections (7.3%), pleural effusion (2.0%), and heart failure (1.7%). Female gender, high postoperative LDH and urea were the most important risk factors. Conclusion: Discharge planning, patient education, and cardiac surgery nurse home visit constitute the most important factors to minimize 30 days of unplanned readmission.