Preoperative red cell distribution width predicts postoperative cognitive dysfunction after coronary artery bypass...

Area of Science:

• Cardiology
• Neurology
• Medical Diagnostics

Background:

• Postoperative cognitive dysfunction (POCD) is a significant concern following coronary artery bypass grafting (CABG).
• Red blood cell distribution width (RDW) is a measure of red blood cell size variation, often indicative of inflammation and other health issues.

Purpose of the Study:

• To investigate the association between preoperative red blood cell distribution width (RDW) and the incidence of postoperative cognitive dysfunction (POCD) in patients undergoing coronary artery bypass grafting (CABG).
• To determine if RDW can serve as an independent predictor for POCD after CABG.

Main Methods:

• A cohort of 362 patients undergoing CABG were enrolled.
• Neuropsychological examinations were performed 21 days post-operation to assess POCD.
• Receiver operating characteristic (ROC) curve analysis identified the optimal RDW cut-off value for POCD prediction.
• Logistic regression analysis was employed to evaluate the relationship between RDW and POCD, adjusting for potential confounding factors.

Main Results:

• The incidence of POCD at 21 days post-CABG was 27.1%.
• Patients with POCD exhibited significantly higher preoperative RDW levels (17.4%) compared to those without POCD (13.2%).
• RDW demonstrated a sensitivity of 82.7% and specificity of 64.8% for predicting POCD.
• Elevated preoperative RDW remained an independent predictor of POCD (OR = 2.52, 95% CI: 1.28-4.31) after adjusting for other variables.

Conclusions:

• Preoperative red blood cell distribution width is significantly elevated in patients who develop postoperative cognitive dysfunction after CABG.
• Elevated preoperative RDW is associated with an increased risk of POCD.
• Preoperative RDW is a valuable and independent predictor of POCD in the context of CABG surgery.