Correlation Between Parameters of Intervertebral Disc and Cervical Lordosis in Cervical Spondylotic Myelopathy
Zhuxi Huang, Yue Zhu, Wei Yuan
Department of Orthopedics, First Hospital of China Medical University, Shenyang, Liaoning, China (mainland)
Med Sci Monit 2020; 26:e924857
Available online: 2020-06-17
In cervical disc degeneration, cervical disc height (CDH) and cervical disc angle (CDA)have a certain but unidentified relationship with cervical lordosis (CL). This study aimed to reveal the relationship among CDH, CDA, and CL in patients diagnosed with cervical spondylotic myelopathy (CSM).
MATERIAL AND METHODS: A retrospective analysis was conducted using the data of 212 CSM patients (136 males and 76 females). According to CL angle, patients were classified into 2 groups: patients with CL ≤10° constituted Group 1 (n=102); patients with CL >10° constituted Group 2 (n=110). The CDH, CDA, and CL were measured using X-ray imaging. Pearson correlation analysis measured the correlation between CDH, CDA, and CL. Multiple linear regression was utilized to analyze the effects of CDH and CDA on CL.
RESULTS: The CDAs in every level were higher in Group 2 than those in Group 1 (P<0.05).CDH and CDA gradually increased with the increase in vertebral level and dropped at C5-C6 level in both groups. We found statistically significant correlations between C3/4H, C4/5H, C3/4A,C4/5A, C5/6A, and C6/7Aand CL in Group 1 (P<0.05), and between C4/5H, C3/4A, and C4/5Aand CL in Group 2 (P<0.05). C3/4A and C4/5A predicted CL in Group 1 (adjusted R²=0.176, P<0.001), while C4/5A predicted CL with high sensitivity in Group 2 (adjusted R²=0.198, P<0.001).
CONCLUSIONS: CDA contributes more than CDH to CL in CSM. Further studies are necessary to reveal the relationship between CL and cervical disc degeneration.
Keywords: Cervical Vertebrae, intervertebral disc degeneration, Lordosis, spondylosis