The computer grades are QFVC=F, QFEV1=A. The computer FVC grade is low as none of the curves have a one-second plateau -- the plateau is not maintained due to the variation in volume at the end of the tests. This is a young subject who is expected to reach a plateau in a few seconds; and therefore, exhalation is probably complete -- thus the revised grades of QFVC=B and QFEV1=A.
