Background: Alcohol abuse (AA) has s high prevalence, affecting 10 to 15 million Americans. While AA was demonstrated to negatively impact cardiovascular health, limited evidence from existing studies presents conflicting findings regarding the effects of AA on coronary artery bypass grafting (CABG) outcomes. This study aimed to compare the in-hospital outcomes after CABG between AA and non-AA patients.
Methods: Patients who underwent CABG were identified in National Inpatient Sample from Q4 2015-2020. Exclusion criteria included age<18 years and concomitant procedures. A 1:3 propensity-score matching was used to address differences in demographics, socioeconomic status, primary payer status, hospital characteristics, comorbidities, and transfer/admission status between AA and non-AA patients. In-hospital outcomes after CABG were examined.
Results: There were 5694 (3.39%) AA patients who underwent CABG. After matching, 17,315 from 162,488 non-AA patients were matched to all AA patients. AA and non-AA patients had comparable mortality (1.64% vs 1.55%, p = 0.67) and MACE (2.46% vs 2.56%, p = 0.73). However, AA patients had higher cardiogenic shock (8.31% vs 7.43%, p = 0.03), mechanical ventilation (11.51% vs 7.96%, p < 0.01), hemorrhage/hematoma (57.49% vs 54.75%, p < 0.01), superficial (0.99% vs 0.61%, p < 0.01) and deep wound complications (0.37% vs 0.18%, p = 0.02), reopen surgery for bleeding control (0.92% vs 0.63%, p = 0.03), transfer out (21.00% vs 16.38%, p < 0.01), longer time from admission to operation (p < 0.01), longer length of stay (p < 0.01), and higher hospital charge (p < 0.01).
Conclusion: While AA was not found to be linked with in-hospital mortality or MACE after CABG, it was independently associated with postoperative complications. These findings could enhance preoperative risk stratification for AA patients and inform postoperative management following CABG.
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