An independent agreement study of modified Pfirrmann grading system for cervical inter-vertebral disc degeneration in cervical spondylotic myelopathy

References

• Fujiyoshi T, Yamazaki M, Kawabe J, et al. A new concept for making decisions regarding the surgical approach for cervical ossification of the posterior longitudinal ligament: the K-line. Spine 2008;33:E990–E993.
   PubMed Web of Science ®Google Scholar
• Karadimas S, Erwin W, Ely C, et al. Pathophysiology and natural history of cervical spondylotic myelopathy. Spine 2013;38:S21–S36.
   PubMed Web of Science ®Google Scholar
• Wu JC, Ko CC, Yen YS, et al. Epidemiology of cervical spondylotic myelopathy and its risk of causing spinal cord injury: a national cohort study. Neurosurg Focus 2013;35:E10.
   PubMed Web of Science ®Google Scholar
• Masaki Y, Yamazaki M, Okawa A, et al. An analysis of factors causing poor surgical outcome in patients with cervical myelopathy due to ossification of the posterior longitudinal ligament: anterior decompression with spinal fusion versus laminoplasty. J Spinal Disord Tech 2007;20:7–13.
   PubMed Web of Science ®Google Scholar
• Sakai K, Okawa A, Takahashi M, et al. Five-year follow-up evaluation of surgical treatment for cervical myelopathy caused by ossification of the posterior longitudinal ligament: a prospective comparative study of anterior decompression and fusion with floating method versus laminoplasty. Spine 2012;37:367–76.
   PubMed Web of Science ®Google Scholar
• Griffith JF, Wang YX, Antonio GE, et al. Modified Pfirrmann grading system for lumbar intervertebral disc degeneration. Spine 2007;32:E708–12.
   PubMed Web of Science ®Google Scholar
• Shrout PE, Fleiss JL. Intraclass correlations: uses in assessing rater reliability. Psychol Bull 1979;86:420–8.
   PubMed Web of Science ®Google Scholar
• Fleiss J. Measuring nominal scale agreement among many raters. Psycho Bull 1971;76:378–81.
   Google Scholar
• Cohen J. A coefficient of agreement for nominal scales. Educ Psychol Meas 1960;20:37–46.
   Web of Science ®Google Scholar
• Fleiss J, The design and analysis of clinical experiments. New York: Wiley; 1986.
   Google Scholar
• Landis JR, Koch GG. The measurement of observer agreement for categorical data. Biometrics 1977;33:159–74.
   PubMed Web of Science ®Google Scholar
• Boogaarts HD, Bartels RHMA. Prevalence of cervical spondylotic myelopathy. Eur Spine J 2015;24:139–41.
   PubMed Web of Science ®Google Scholar
• Young WF. Cervical spondylotic myelopathy: a common cause of spinal cord dysfunction in older persons. Am Fam Physician 2000;62:1064–70.
   PubMed Web of Science ®Google Scholar
• Clarke E, Robinson PK. Cervical myelopathy: a complication of cervical spondylosis. Brain 1956;79:483–510.
   PubMed Web of Science ®Google Scholar
• Fehlings MG, Skaf G. A review of the pathophysiology of cervical spondylotic myelopathy with insights for potential novel mechanisms drawn from traumatic spinal cord injury. Spine 1998;23:2730–6.
   PubMed Web of Science ®Google Scholar
• Singh A, Tetreault L, Fehlings MG, et al. Risk factors for development of cervical spondylotic myelopathy: results of a systematic review. Evid Based Spine Care J 2012;3:35–42.
   PubMedGoogle Scholar
• Rhee JM, Shamji MF, Erwin WM, et al. Nonoperative management of cervical myelopathy: a systematic review. Spine 2013;38:S55–S67.
   PubMed Web of Science ®Google Scholar
• Pfirrmann CW, Metzdorf A, Zanetti M, et al. Magnetic resonance classification of lumbar intervertebral disc degeneration. Spine 2001;26:1873–8.
   PubMed Web of Science ®Google Scholar
• Urrutia J, Besa P, Campos M, et al. The Pfirrmann classification of lumbar intervertebral disc degeneration: an independent inter- and intra-observer agreement assessment. Eur Spine J 2016;25:2728–33.
   PubMed Web of Science ®Google Scholar
• Japanese Orthopaedic Association. Scoring system for cervical myelopathy. J Jpn Orthop Assoc 1994;68:490–503.
   Google Scholar
• Vernon H, Mior S. The Neck Disability Index: a study of reliability and validity. J Manipulative Physiol Ther 1991;14:409–15.
   PubMed Web of Science ®Google Scholar
• Wang YX, Kuribayashi H, Wagberg M, et al. Gradient echo MRI characterization of development of atherosclerosis in the abdominal aorta in Watanabe Heritable Hyperlipidemic rabbits. Cardiovasc Intervent Radiol 2006;29:605–12.
   PubMed Web of Science ®Google Scholar