Abstract
Purpose
Sagittal plane alignment is crucial for treating spinal malalignment and low back pain. Pelvic incidence–lumbar lordosis (PI–LL) mismatch is commonly used to evaluate clinical outcomes in patients with sagittal malalignment. The association between PI–LL mismatch and changes surrounding the intervertebral disc is very important to understand the compensatory mechanisms involved. This study aimed to examine the association between PI–LL mismatch and magnetic resonance imaging (MRI) changes surrounding the intervertebral disc in a large population-based cohort.
Methods
We evaluated participants from the second Wakayama Spine Study, recruiting the general population aged 20 years or older, irrespective of sex, who were registered residents in one region in 2014. In total, 857 individuals underwent an MRI of the whole spine; however, 43 MRI results were not included due to incomplete or inadequate quality images. PI–LL mismatch was defined as > 11°. We compared the MRI changes, such as Modic change (MC), disc degeneration (DD), and high-intensity zones (HIZ), between PI–LL mismatch and non-PI–LL mismatch groups. Multivariate logistic regression analysis was conducted to determine the association between the MRI changes and PI–LL mismatch with adjustment for age, sex, and body mass index in the lumbar region and at each level.
Results
A total of 795 participants (243 men, 552 women, mean age 63.5 ± 13.1 years old) were evaluated; 181 were included in the PI–LL mismatch group. MC and DD in the lumbar region were significantly higher in the PI–LL mismatch group. MC in the lumbar region was significantly associated with PI–LL mismatch (odds ratio (OR); 1.81, 95% confidence interval (CI) 1.2–2.7). MC at each level was significantly associated with PI–LL mismatch (OR; 1.7–1.9, 95%CI 1.1–3.2), and DD at L1/2, L3/4, and L4/5 was associated with PI–LL mismatch (OR; 2.0- 2.4. 95%CI 1.2–3.9).
Conclusion
MC and DD were significantly associated with PI–LL mismatch. Therefore, profiling MC may be helpful in improving the targeted treatment of LBP associated with the adult spinal deformity.
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Acknowledgements
The authors wish to thank Mrs. Tamako Tsutsumi, Mrs. Kanami Maeda, and other members of the Public Office in Taiji Town for their assistance in locating and scheduling the participants for examinations. No benefits in any form have been or will be received from a commercial party related directly or indirectly to the subject of this manuscript.
Funding
This work was supported by H-25-Choujyu-007 (Director, NY), H25-Nanchitou (Men)-005 (Director, ST), and 201417014A (Director, NY) from the Ministry of Health, Labour and Welfare, a Grant-in-Aid for Scientific Research (C 26861206) of JSPS KAKENHI grant. And Collaborating Research with NSF 08033011-00262 (Director, NY) from the Ministry of Education, Culture, Sports, Science, and Technology in Japan. This study also was supported by grants from the Japan Osteoporosis Society (NY, HO), a grant from JA Kyosai Research Institute (HO), Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research (KAKENHI) Research C (1 7 K 1 0 9 3 7) (MT), a Grant from the Japanese Orthopaedics and Traumatology Foundation, Inc (No. 287) (MT), The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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MT was contributed to critical editing of the paper, interpretation of findings, administrative support, obtaining of funding, supervision of the study, and conception of study design; HH was contributed to critical editing of the paper, interpretation of findings; HO was contributed to data collection, critical editing of the paper, and interpretation of findings; YA was contributed to data collection; KN was contributed to critical editing of the paper; YI was contributed to critical editing of the paper; HI was contributed to critical editing of the paper; ST was contributed to critical editing of the paper; MT was contributed to critical editing of the paper; ST was contributed to critical editing of the paper; MY was contributed to critical editing of the paper, supervision of the study, and conception of study design; NY was contributed to critical editing of the paper, supervision of the study, and conception of study design; HY was contributed to critical editing of the paper, supervision of the study, and conception of study design.
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Teraguchi, M., Hashizume, H., Asai, Y. et al. Association between modic changes, disc degeneration, and pelvic incidence–lumbar lordosis mismatch in a large population based cohort: the Wakayama spine study. Eur Spine J (2023). https://doi.org/10.1007/s00586-023-07702-8
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DOI: https://doi.org/10.1007/s00586-023-07702-8