The correlation between radiographic and pathologic grading of lumbar facet joint degeneration

BMC Medical Imaging

Table 5 Intraobserver agreement

	Histology		CT		MR		CT combined with MR
Reader	1	2	1	2	1	2	1	2
Exact estimate	67	66	57	58	57	58	58	60
	90.54 %	89.19 %	77.03 %	78.38 %	77.03 %	78.38 %	78.38 %	81.08 %
Wκ	0.852	0.833	0.655	0.654	0.646	0.656	0.653	0.669

ISSN: 1471-2342