Click on image to view larger version.

Figure 2 (A) Actuarial estimate of freedom from aortic regurgitation (AR) (grade I) in the 1,156 hospital survivors after the arterial switch operation. Numbers indicate number of patients observed at the beginning of an interval. (B) Hazard function for AR in 1,156 survivors after the arterial switch operation. Dotted lines = 95% confidence interval.