IJCS | Volume 31, Nº3, May/ June 2018

261 Kaufman et al. Mortality in Elderly Individuals Submitted to Coronary Artery Bypass Grafting International Journal of Cardiovascular Sciences. 2018;31(3)258-263 Original Article Table 4 - Multivariate analysis of surgical death predictors in the initial stage Factor Odds ratio Standard error 95%CI p-value Emergency surgery 4.4952 2.5857 1.4559-13.879 0.009 Peripheral vascular disease 2.5038 0.9111 1.2271-5.1091 0.012 Left atrial dimension 1.4488 0.3623 0.8874-2.3655 0.138 Combined surgery 2.1760 1.2039 0.7357-6.4358 0.160 Previous surgery 1.6740 0.6984 0.7390-3.7925 0.217 Moderate/severe tricuspid regurgitation 3.1501 3.1348 0.4479-22.152 0.249 Beta-blocker in the preoperative period 0.6536 0.2706 0.2903-1.4715 0.304 Moderate/severe aortic stenosis 1.4779 0.7335 0.5587-3.9096 0.431 Statins in the preoperative period 0.8023 0.3059 0.3800-1.6941 0.564 NYHA III-IV 1.3249 0.6894 0.4777-3.6742 0.589 Nitrates in the preoperative period 1.2760 0.8513 0.3451-4.7179 0.715 Moderate/severe aortic regurgitation 0.9405 0.5882 0.2761-3.2041 0.922 95% CI: 95% confidence interval; NYHA: New York Heart Association. Table 5 - Multivariate analysis of the factors predicting surgical death in the final stage Factor Odds ratio Standard error 95%CI p-value Combined surgery 3.8651 1.2871 2.0123-7.4236 < 0.001 Emergency surgery 4.8608 2.3881 1.8558-12.732 0.001 Peripheral vascular disease 2.4773 0.8218 1.2931-4.7463 0.006 95% CI: 95% confidence interval. circulatory system has alterations caused by the aging process, such as increased arterial stiffness, diastolic function worsening and greater extent of coronary artery disease. 12-14 Compared to younger patients, elderly ones have higher mortality in relation to revascularization – be it surgical or percutaneous. However, in comparison with percutaneous revascularization, the long-termbenefits of undergoing surgery are better for the elderly, especially in relation to greater symptomatic relief and the less need for new revascularizations. 15 Several studies have shown that age leads to an increased risk of death. Santos et al. observed that patients over 65 years of age have a 2.3-fold higher risk of death than younger patients; Rocha et al. compared patients older and younger than 70 years, and found a mortality rate of 8.9% in the older patients and 3.6% in the younger patients – this cohort did not involve patients submitted to the combined surgery, which is an important predictor of mortality. 16,17 Contrarily, Aikawa did not identify an impact on the mortality in older patients (> 65 years) (5.8%vs. 2.0%), but identified a higher rate of postoperative complications in the elderly, when compared to the younger patients (30% vs. 14%). 14 We already have reports of surgical series involving octogenarians submitted to isolated myocardial revascularization procedures, showing that these patients have a higher risk of developing in-hospital death; however, when compared with patients who undergo