Table 2

Inter-and intra-observer agreement data for simplified US B-lines assessment

Inter-observer

Intra-observer

Anatomical lines

weighted kappa values for the

semiquantitative system

weighted kappa values for the

semiquantitative system

2^nd para-sternal LIS

0.885

0.864

4^th mid-clavear LIS

0.836

0.881

4^th anterior axillary LIS

0.863

0.868

4^th mid-axillary LIS

0.812

0.845

8^th paravertebral LIS

0.769

0.894

8^th sub-scapular LIS

0.828

0.883

8^th posterior axilary LIS

0.864

0.862

Agreement between both sonographers on both the comprehensive simplified US assessment.

Gutierrez et al. Arthritis Research & Therapy 2011 13:R134   doi:10.1186/ar3446