IJCS | Volume 32, Nº2, May/June 2019

224 Figure 2 - Mortality rate by age range. In patients older than 80 years, mortality rate was 66.7%, significantly higher than other ages (p = 0.03). Age range (years) Mortality (%) Lobato et al. Patients undergoing cagb in Pará, Brazil Int J Cardiovasc Sci. 2019;32(3)217-226 Original Article Table 5 - Variables associated with hospital mortality and mortality in the first year of follow-up in patients who underwent myocardial revascularization surgery at Fundação Hospital de Clínicas Gaspar Vianna between 2013 and 2014 Variable Odds Ratio 95%CI p value Lower limit Upper limit Previous MRS 18.3 3.1 107.7 < 0.001 Age > 80 years 16.5 1.4 191.0 0.003 Need for hemodialysis after MRS 9.1 2.1 39.5 0.001 Baseline chronic kidney disease (GFR < 60 mL/min) 6.4 1.3 31.0 0.009 Infection in patients waiting for surgery 3.1 1.1 8.5 0.023 Postoperative infection 3.1 1.2 8.5 0.019 Hospital infection at any time 3.3 1.2 9.4 0.021 Prolonged preoperative hospitalization (> 30 days) 2.6 1.0 6.6 0.039 MRS: myocardial revascularization surgery; GFR: glomerular filtration rate. p < 0.05. Most patients were discharged, approximately 20% were lost to outpatient follow-up; three deaths occurred in the first year after discharge. A study conducted in four public hospitals in Rio de Janeiro showed amortality rate of 14.9% one year after discharge. 12 Such divergency may be explained by the high loss to follow-up rate in our study, which may have underestimated mortality rate after discharge (since no information of these patients were obtained). Based on the high mortality rate, the increased waiting time for surgery and the high incidence of infection related to waiting time, it would wise to