[Retracted] Quantitative Relationship between the Degree of Lumbar Disc Degeneration and Intervertebral Disc Height in Patients with Low Back Pain

Table 2

Intervertebral disc heights with different degeneration grades at each segment level (mean ± standard error).

	Intervertebral height of lumbosacral disc degeneration at different levels (in mm)
	1	2	3	4	5
L1/2	12.51 ± 0.03	10.06 ± 0.4	8.74 ± 0.4	7.84 ± 0.4	—	0.009	0.034
L2/3	—	11.65 ± 0.5	9.98 ± 0.3	8.78 ± 0.4	6.16 ± 0.02	<0.001	0.001
L3/4	—	12.99 ± 0.7	10.98 ± 0.5	9.92 ± 0.5	—	0.011	0.011
L4/5	—	13.39 ± 1.0	11.74 ± 0.5	10.12 ± 0.6	5.56 ± 0.02	<0.001	<0.001
L5/S1	14.19 ± 0.04	11.79 ± 0.5	10.66 ± 0.6	9.26 ± 0.9	5.61 ± 0.8	<0.001	0.004

value is F test two-two comparison maximum : Comparison of grades 1–5 disc heights; : Comparison of grades 2–4 discs.