Risk factor mOR1 CI 95 % P Diabetes Mellitus 1.9 1.0-3.8 0.05 NYHA class IV 3.9 1.8-8.4 0.0001 Surgical drainage 2 1.2 1.1-1.4 0.0001 1mOR: matched Odds Ratio adjusted by the variables shown in the table, CI: Confidence Interval, 2Common Odds Ratio assuming a linear trend. Abbreviations: NYHA: New York Heart American Society.

Table 3: Risk factors for surgical site infection after coronary artery bypass graft. Multivariate analysis.