Table 5 Results of FEV1 and the N2 test from 6 to 24 months post transplantation.
From: Prediction of BOS by the single-breath nitrogen test in double lung transplant recipients
Definition of abnormal | Total number of test results | Total number of abnormal results | Number of abnormal results preceding BOS | Predictive value (%) | |
|---|---|---|---|---|---|
FEV1 | < 90% basal | 299 | 28 | 11 | 39 |
N2 test | > 478% pred. | 259 | 22 | 12 | 55 |
FEV1 + N2 test | Both definitions | 259 | 12 | 9 | 75 |