Table 2.

Intraobserver reliability of spinal canal diameter and spinal cord width.

	SCD			SCW
	Neutral ICC (95% CI)	Flexion ICC (95% CI)	Extension ICC (95% CI)	Neutral ICC (95% CI)	Flexion ICC (95% CI)	Extension ICC (95% CI)
C2–C3	0.94 (0.86–0.98)	0.95 (0.87–0.98)	0.97 (0.92–0.98)	0.78 (0.41–0.91)	0.91 (0.76–0.96)	0.88 (0.68–0.95)
C3–C4	0.89 (0.73–0.96)	0.98 (0.95–0.99)	0.95 (0.88–0.98)	0.84 (0.58–0.94)	0.85 (0.62–0.94)	0.89 (0.72–0.96)
C4–C5	0.87 (0.66–0.95)	0.94 (0.86–0.98)	0.89 (0.70–0.95)	0.83 (0.55–0.93)	0.89 (0.72–0.96)	0.87 (0.66–0.95)
C5–C6	0.93 (0.83–0.97)	0.93 (0.81–0.97)	0.92 (0.78–0.98)	0.84 (0.57–0.94)	0.94 (0.86–0.98)	0.89 (0.71–0.96)
C6–C7	0.90 (0.75–0.96)	0.83 (0.56–0.93)	0.91 (0.78–0.96)	0.73 (0.29–0.90)	0.82 (0.54–0.93)	0.82 (0.52–0.93)

CI, confidence interval; ICC, intraclass confidence correlation; SCD, spinal canal diameter; SCW, spinal cord width.