Paravertebral Muscle Morphology in L4-L5 Disc Herniation: Insights from the Michigan State University Classification

21 October 2023: Clinical Research

Pei-yu Du ^1AB* , Yong-wang Zhang ^2AB* , Xu-hao Cao ^3B , Yue-lin Liu ^3C , Yun-tao Yan ^2CD , Lu Liu ^2EF , Shuang-qing Du ^2AFG*

DOI: 10.12659/MSM.941937

Med Sci Monit 2023; 29:e941937

Table 4 Cross-sectional area of patients with L4–L5 herniation in different zone compared with normal people.

	Zone A		Zone B		Zone C
	B	P	B	P	B	P
Age	−0.012	0.450	−0.015	0.382	0.067	0.014^*
Sex	−0.267	0.653	−0.887	0.167	−1.413	0.082
CSA of MF
L12	0.004	0.833	−0.327	0.150	0.000	0.990
L23	−0.181	0.768	0.236	0.359	0.207	0.581
L34	0.068	0.284	0.175	0.325	0.226	0.244
L45	0.128	0.652	0.166	0.111	0.054	0.711
L51	−0.014	0.339	0.048	0.504	−0.197	0.075
CSA of ES
L12	−0.011	0.784	0.033	0.493	−0.037	0.529
L23	−0.047	0.284	−0.083	0.095	−0.032	0.647
L34	−0.016	0.715	−0.086	0.120	−0.079	0.200
L45	−0.043	0.469	−0.132	0.049^*	−0.057	0.516
L51	−0.025	0.630	−0.148	0.075	0.088	0.342
CSA of PM
L12	0.023	0.768	−0.108	0.495	−0.292	0.209
L23	0.185	0.146	0.131	0.373	0.222	0.251
L34	0.063	0.339	0.065	0.330	0.050	0.506
L45	0.079	0.082	0.069	0.145	0.087	0.217
L51	−0.064	0.095	−0.028	0.368	0.010	0.846
CSA – cross-sectional area; MF – multifidus; ES – erector spinae; PM – psoas major; ^* means