Table 5. Inter-Observer Agreement in Assessing Presence of Abutment and Protrusion to Mediastinal Pleura.

k value	Reader 1 vs. Reader 2	Reader 1 vs. Reader 3	Reader 1 vs. Reader 4	Reader 2 vs. Reader 3	Reader 2 vs. Reader 4	Reader 3 vs. Reader 4
Abutment	0.523 (0.244–0.802)	0.478 (0.206–0.750)	0.893 (0.687–1.000)	0.941 (0.827–1.000)	0.444 (0.162–0.726)	0.404 (0.134–0.675)
Protrusion	0.767 (0.553–0.981)	0.827 (0.641–1.000)	0.700 (0.467–0.933)	0.941 (0.827–1.000)	0.683 (0.431–0.935)	0.630 (0.370–0.891)

Data in parenthesis indicates 95% CI.