Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 4 Intraobserver variability: intraclass correlation coefficients

From: Cervical degenerative index: a new quantitative radiographic scoring system for cervical spondylosis with interobserver and intraobserver reliability testing

	Intraobserver ICC (R1)	Intraobserver ICC (R2)	Intraobserver ICC (R3)
Total score	0.451	0.886	0.867
Osteophyte	0.492	0.676	0.706
Listhesis	0.431	0.743	0.754
Disc narrow	0.691	0.861	0.951
Sclerosis	0.234	0.582	0.702
C2–C3	0.348	0.499	0.367
C3–C4	0.591	0.852	0.875
C4–C5	0.642	0.880	0.895
C5–C6	0.529	0.872	0.908
C6–C7	0.552	0.878	0.938

Poor <0.40, fair 0.40–0.60, good 0.60–0.80, excellent >0.80
ICC Intraclass correlation coefficient

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