Table 4 Agreement between LCI and spirometry classified as abnormal or normal
FEV1FEF75
AbnormalNormalAbnormalNormal
LCI
    Abnormal7241813
    Normal013112
p = 0.065p = 0.006

  • LCI, lung clearance index; FEV1, forced expiratory volume in 1 s; FEF75, maximal expiratory flow when 75% of forced vital capacity was expired.

  • p Values refer to the Yates corrected χ2 test.