borderline significancep = 0.05
The difference in mortality rates reached the borderline significance level for isolated aortic (2.6% vs. 0.4%, p = 0.05) and mitral valve replacement (10.1% vs. 0.0%, p = 0.05) and was not significantly different for on-pump coronary surgery (11.9% vs. 6.1%, p = 0.32) and isolated tricuspid valve surgery (10.3% vs. 0.0%, p = 0.29) or aortic (2.5% vs. 0.0%, p = 0.35) and mitral (0.9% vs. 0.0%, p = 0.15) valve repairs; for complete data, see Table 3 . 4.