Table 2—

Weighted kappa coefficients(κw) between thoracic high-resolution computed tomography (HRCT) reviewers#

Mean κwκw (95% CI)
A versus BA versus CB versus C
Total0.400.40 (0.29–0.52)0.33 (0.23–0.44)0.46 (0.36–0.56)
OLB/TLB: UIP
 Absent0.410.47 (0.03–0.92)0.24 (-0.21–0.69)0.52 (0.19–0.86)
 Present0.350.35 (0.16–0.54)0.21 (0.03–0.40)0.49 (0.33–0.66)
 Total reviewed0.400.41 (0.24–0.58)0.27 (0.11–0.43)0.53 (0.38–0.67)
TBLB/no biopsy0.400.40 (0.24–0.56)0.40 (0.26–0.54)0.39 (0.26–0.53)
FVC
 <60% pred0.400.36 (0.16–0.56)0.33 (0.15–0.51)0.50 (0.34–0.67)
 >60% pred0.390.42 (0.28–0.56)0.33 (0.20–0.46)0.43 (0.30–0.56)
  • CI: confidence interval; OLB: open lung biopsy; TLB: thoracoscopic lung biopsy; UIP: usual interstitial pneumonia; TBLB: transbronchial lung biopsy; FVC: forced vital capacity; % pred: % predicted. #: each reviewer (A, B and C) scored the HRCT scans as unlikely, probable or very suggestive for the diagnosis of UIP.