Abstract 3117: Clinical Characteristics and Operative Mortality Among Whites, Hispanics, Asians and Blacks in the 2003 California Coronary Artery Bypass Graft Surgery Outcomes Reporting Program
Aim: To compare the clinical characteristics, and operative mortality of White, Hispanic, Asian, and Black ethnic groups undergoing coronary artery bypass graft surgery (CABG) in California using data from the 2003 California CABG Outcomes Reporting Program (CCORP)
Background: The importance of differences in clinical characteristics between ethnic groups on operative mortality of CABG has not been clarified.
Methods: Data reporting to the CCORP is mandated under state law in California. Data from 121 hospitals that performed CABG during 2003 were analyzed, including demographics, clinical characteristics, predicted and observed mortality in patients who underwent isolated CABG. Predicted mortality was calculated using a multivariate model.
Results: 21,272 isolated CABG were reported in 2003. Significant clinical differences exist between White (n=15,069), Hispanic (n=2,561), Asian (n=1,772) and Black (n=785) patients. Using Whites as the reference group, Hispanics were younger, more likely to be female, had more hypertension, diabetes, renal failure, heart failure and severe liver disease (all p<0.05). Asians were more likely to be younger, female, have a lower BMI, more hypertension, diabetes, renal failure and severe liver disease (all p<0.05). Blacks were more likely to be younger, female, have a higher BMI, more hypertension, diabetes, peripheral vascular disease, renal failure, heart failure and severe liver disease (all p<0.05). Using a multivariate model, the predicted operative mortality for Hispanics (3.2%), Asians (3.3%) and Blacks (3.6%) were higher than Whites (2.8%) (all p<0.001). However there was no significant difference in observed operative mortality among the ethnic groups, although there was a trend towards higher mortality in Asians compared to Whites (3.5% vs. 2.8%, p=0.077). There was no significant difference between the predicted and observed operative mortality for each ethnicity.
Conclusions: Significant differences in risk profile exist between ethnic groups. Although the predicted operative mortality for Hispanics, Asians and Blacks was significantly higher than Whites, there was no significant difference in the observed operative mortality.