Abstract
Purpose
Degenerative spinal conditions, including disc degeneration (DD), Schmorl nodes (SN), and endplate signal changes (ESC), are pervasive age-associated phenomena that critically affect spinal health. Despite their prevalence, a comprehensive exploration of their distribution and correlations is lacking. This study examined the prevalence, distribution, and correlation of DD, SN, and ESC across the entire spine in a population-based cohort.
Methods
The Wakayama Spine Study included 975 participants (324 men, mean age 67.2 years; 651 women, mean age 66.0 years). Magnetic resonance imaging (MRI) was used to evaluate the intervertebral space from C2/3 to L5/S1. DD was classified using Pfirrmann's system, ESC was identified by diffuse high-intensity signal changes on the endplates, and SN was defined as a herniation pit with a hypointense signal. We assessed the prevalence and distribution of SN, ESC, and DD across the entire spine. The correlations among these factors were examined.
Results
Prevalence of ≥ 1 SN over the entire spine was 71% in men and 77% in women, while prevalence of ≥ 1 ESC was 57.9% in men and 56.3% in women. The prevalence of ESC and SN in the thoracic region was the highest among the three regions in both sexes. Positive linear correlations were observed between the number of SN and DD (r = 0.41, p < 0.001) and the number of ESC and DD (r = 0.40, p < 0.001), but weak correlations were found between the number of SN and ESC (r = 0.29, p < 0.001).
Conclusion
The prevalence and distribution of SN and ESC over the entire spine were observed, and correlations between SN, ESC, and DD were established. This population-based cohort study provides a comprehensive analysis of these factors.
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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 Scientifc Research (C 26861206) of JSPS KAKENHI grant. And Collaborating Research with NSF 08033011-00262 (Direc tor, 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 Scientifc 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: Critical editing of the paper, interpretation of findings, administrative support, obtaining of funding, supervision of the study, conception of study design. HH: Critical editing of the paper, interpretation of findings. HO: Data collection, critical editing of the paper, interpretation of findings. RK: Data collection. KN: Critical editing of the paper. YI: Critical editing of the paper. ST: Critical editing of the paper. MY: Critical editing of the paper, supervision of the study, conception of study design. NY: Critical editing of the paper, supervision of the study, conception of study design. HY: Critical editing of the paper, supervision of the study, conception of study design.
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Teraguchi, M., Hashizume, H., Oka, H. et al. Prevalence and distribution of Schmorl node and endplate signal change, and correlation with disc degeneration in a population-based cohort: the Wakayama Spine Study. Eur Spine J 33, 103–110 (2024). https://doi.org/10.1007/s00586-023-08009-4
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DOI: https://doi.org/10.1007/s00586-023-08009-4