Table 4.

Kappa Coefficient for Secondary Questions of the Intraobserver Variability Survey

Secondary Imaging Features	Chest	Nonchest	Resident
Typical:
Peripheral, bilateral, GGO with or without consolidation or visible intralobular lines (i.e., crazy paving)	0.55 ± 0.08	0.41 ± 0.10	0.33 ± 0.11
Multifocal GGO of rounded morphology with or without consolidation or visible intralobular lines (“crazy paving”)	0.50 ± 0.11	0.36 ± 0.13	0.50 ± 0.11
Reverse halo sign or other findings of organizing pneumonia	0.76 ± 0.13	–	–
Indeterminate:
Multifocal, diffuse, perihilar, or unilateral GGO with or without consolidation lacking a specific distribution and are nonrounded or nonperipheral	0.61 ± 0.07	0.52 ± 0.08	0.41 ± 0.09
Few very small GGO with a nonrounded and nonperipheral distribution	−0.01 ± 0.01	0.66 ± 0.32	0.11 ± 0.14
Atypical:
Isolated lobar or segmental consolidation without GGO	0.27 ± 0.23	0.46 ± 0.14	0.57 ± 0.13
Discrete small nodules (centrilobular, tree-in-bud	0.70 ± 0.14	0.72 ± 0.12	0.47 ± 0.16
Lung cavitation	–	–	–
Smooth interlobular septal thickening with pleural effusion	–	0.49 ± 0.30	0.65 ± 0.19