Table 1.

Scoring system of cervical disc degeneration based on neutral lateral radiographs

1. Height loss
Middle disc height compared to normal middle disc height at an adjacent level	0% ≤25% >25%–≤50% >50%–≤75% >75%	0 points 1 points 2 points 3 points 4 points
2. Anterior osteophytes with respect to the AP diameter of the corresponding VB	No osteophytes ≤1/8 AP diameter >1/8–≤1/4 AP diameter >1/4 AP diameter	0 points 1 point 2 points 3 points
3. Endplate sclerosis	No sclerosis	0 points
	Detectable	1 point
	Definite	2 points
Overall degree of disc degeneration = 1 + 2 + 3	0 points (no degeneration)
	1–3 points (mild degeneration)
	4–6 points (moderate degeneration)
	7–9 points (severe degeneration)

VB vertebral body, AP anteroposterior