Table 2.

Kappa Coefficients for Secondary Questions of the Interobserver Survey

Imaging Features	Chest	Nonchest	Resident
Typical:
Peripheral, bilateral, GGO with or without consolidation or visible intralobular lines (i.e., crazy paving)	0.57 ± 0.19	0.37 ± 0.10	0.15 ± 0.17
Multifocal GGO of rounded morphology with or without consolidation or visible intralobular lines (“crazy paving”)	0.30 ± 0.12	0.29 ± 0.16	0.24 ± 0.14
Reverse halo sign or other findings of organizing pneumonia	−0.03 ± 0.16	0.08 ± 0.23	−0.15 ± 0.32
Indeterminate:
Multifocal, diffuse, perihilar, or unilateral GGO with or without consolidation lacking a specific distribution and are nonrounded or nonperipheral	1.00 ± 0.30	0.73 ± 0.26	0.19 ± 0.23
Few very small GGO with a nonrounded and nonperipheral distribution	1.00 ± 0.28	0.73 ± 0.26	0.31 ± 0.20
Atypical:
Isolated lobar or segmental consolidation without GGO	0.65 ± 0.23	0.47 ± 0.19	0.60 ± 0.18
Discrete small nodules (centrilobular, tree-in-bud	0.38 ± 0.36	0.47 ± 0.14	0.61 ± 0.17
Lung cavitation	−0.37 ± 0.66	1.00 ± 0.78	0.16 ± 0.58
Smooth interlobular septal thickening with pleural effusion	1.00 ± 0.52	0.39 ± 0.29	0.70 ± 0.20