{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,19]],"date-time":"2026-08-19T18:08:18Z","timestamp":1787162898913,"version":"build-2736575974"},"reference-count":12,"publisher":"BMJ","issue":"1","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Open Sport Exerc Med"],"accepted":{"date-parts":[[2018,9,3]]},"published-print":{"date-parts":[[2018,10]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To find a radiographic method that best correlates with the mean subaxial cervical space available for the cord (MSCSAC) by using a fixed size parameter as radiographic reference, in contrast to the use of vertebral bodies as reference in the mean subaxial cervical Torg ratio (MTorg).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>The study was approved by an institutional review board and written informed consent was obtained. Radiographs and cervical neck MRI were obtained from 18 male rugby athletes (age 18\u201330 years). Rheumatic disease, symptomatic cervical orthopaedic disease and previous cervical injury were used as exclusion criteria. MSCSAC and MTorg were calculated for each individual as the space available for the cord and Torg ratio averages from C3 to C6, respectively. A new radiographic method, using a metal bar as a size parameter (the corrected diameter of the cervical canal - CDCC), was also calculated for each individual, as well as its average from C3 to C6 (mean corrected diameter of the cervical canal - MCDCC). Values obtained for MCDCC and MTorg were correlated with those obtained by the MSCSAC using Pearson\u2019s coefficient.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Four volunteers were excluded due to previous cervical injury. In total, 14 subjects had their radiographs and MRIs analysed. Pearson\u2019s correlation between MSCSAC and MTorg was 0.5706 (p=0.033). The correlation between MSCSAC and MCDCC was 0.6903 (p=0.006).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>MCDCC correlates better than MTorg with MSCSAC and may be a better radiographic option than MTorg for cervical stenosis evaluation.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1136\/bmjsem-2018-000411","type":"journal-article","created":{"date-parts":[[2018,10,16]],"date-time":"2018-10-16T09:00:48Z","timestamp":1539680448000},"page":"e000411","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":1,"title":["Determination of cervical stenosis in rugby players using an alternative radiographic method"],"prefix":"10.1136","volume":"4","author":[{"given":"Gustavo","family":"C Bornholdt","sequence":"first","affiliation":[{"name":"Sports Medicine Group of the Orthopedics Institute, Hospital das Cl\u00ednicas da Faculdade de Medicina da Universidade de S\u00e3o Paulo, Sao Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bruno","family":"Siqueira Campos Lopes","sequence":"additional","affiliation":[{"name":"Department of Radiology, Hospital Benefic\u00eancia Portuguesa, S\u00e3o Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pedro","family":"Francisco Senne Paz","sequence":"additional","affiliation":[{"name":"Sports Medicine Group of the Orthopedics Institute, Hospital das Cl\u00ednicas da Faculdade de Medicina da Universidade de S\u00e3o Paulo, Sao Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arnaldo","family":"Jos\u00e9 Hernandez","sequence":"additional","affiliation":[{"name":"Sports Medicine Group of the Orthopedics Institute, Hospital das Cl\u00ednicas da Faculdade de Medicina da Universidade de S\u00e3o Paulo, Sao Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andr\u00e9","family":"Pedrinelli","sequence":"additional","affiliation":[{"name":"Sports Medicine Group of the Orthopedics Institute, Hospital das Cl\u00ednicas da Faculdade de Medicina da Universidade de S\u00e3o Paulo, Sao Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2018,10,16]]},"reference":[{"key":"2025083110252846000_4.1.e000411.1","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-199609000-00003"},{"key":"2025083110252846000_4.1.e000411.2","doi-asserted-by":"publisher","DOI":"10.1177\/036354657700500508"},{"key":"2025083110252846000_4.1.e000411.3","doi-asserted-by":"publisher","DOI":"10.1001\/jama.1979.03290400040019"},{"key":"2025083110252846000_4.1.e000411.4","doi-asserted-by":"crossref","first-page":"1354","DOI":"10.2106\/00004623-198668090-00008","article-title":"Neurapraxia of the cervical spinal cord with transient quadriplegia","volume":"68","author":"Torg","year":"1986","journal-title":"J Bone Joint Surg Am"},{"key":"2025083110252846000_4.1.e000411.5","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.164.3.3615879"},{"key":"2025083110252846000_4.1.e000411.6","doi-asserted-by":"publisher","DOI":"10.3171\/jns.1997.87.6.0843"},{"key":"2025083110252846000_4.1.e000411.7","first-page":"233","article-title":"Stingers, transient quadriplegia, and cervical spinal stenosis: return to play criteria","volume":"29","author":"Cantu","year":"1997","journal-title":"Med Sci Sports Exerc"},{"key":"2025083110252846000_4.1.e000411.8","doi-asserted-by":"publisher","DOI":"10.1097\/00007632-199106001-00001"},{"key":"2025083110252846000_4.1.e000411.9","doi-asserted-by":"publisher","DOI":"10.3171\/2009.3.SPINE08642"},{"key":"2025083110252846000_4.1.e000411.10","first-page":"190","article-title":"Cervical spine stenosis measures in normal subjects","volume":"37","author":"Tierney","year":"2002","journal-title":"J Athl Train"},{"key":"2025083110252846000_4.1.e000411.11","doi-asserted-by":"publisher","DOI":"10.1007\/s00586-012-2437-2"},{"key":"2025083110252846000_4.1.e000411.12","doi-asserted-by":"crossref","first-page":"E1134","DOI":"10.1097\/BRS.0b013e3181f822c7","article-title":"Preoperative evaluation of the cervical spondylotic myelopathy with flexion-extension magnetic resonance imaging: about a prospective study of fifty patients","volume":"36","author":"Zhang","year":"2011","journal-title":"Spine"}],"container-title":["BMJ Open Sport &amp; Exercise Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bmjsem-2018-000411","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,31]],"date-time":"2025-08-31T17:25:39Z","timestamp":1756661139000},"score":1,"resource":{"primary":{"URL":"https:\/\/bmjopensem.bmj.com\/lookup\/doi\/10.1136\/bmjsem-2018-000411"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,10]]},"references-count":12,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2018,10,16]]},"published-print":{"date-parts":[[2018,10]]}},"alternative-id":["10.1136\/bmjsem-2018-000411"],"URL":"https:\/\/doi.org\/10.1136\/bmjsem-2018-000411","relation":{},"ISSN":["2055-7647"],"issn-type":[{"value":"2055-7647","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,10]]}}}