The Journal of Bone and Joint Surgery (American). 2007;89:1057-1065.
doi:10.2106/JBJS.F.00684
© 2007 The Journal of Bone and Joint Surgery, Inc.
Cervical Spine Injury Severity ScoreAssessment of Reliability
Paul A. Anderson, MD1,
Timothy A. Moore, MD2,
Kirkland W. Davis, MD3,
Robert W. Molinari, MD4,
Daniel K. Resnick, MD5,
Alexander R. Vaccaro, MD6,
Christopher M. Bono, MD7,
John R. Dimar, II, MD8,
Bizhan Aarabi, MD, FRCSC9,
Glen Leverson, PhD1 the Spinal Trauma Study Group
1 Department of Orthopaedic Surgery and Rehabilitation, University of Wisconsin,
600 Highland Avenue, K4/736, Madison, WI 53792. E-mail address for P.A.
Anderson:
anderson{at}orthorehab.wisc.edu
2 Department of Orthopaedic Surgery, CASE School of Medicine, MetroHealth
Medical Center, 2500 MetroHealth Drive, Cleveland, OH 44109. E-mail address:
tmoore{at}metrohealth.org
3 Department of Radiology, University of Wisconsin, 600 Highland Avenue, E3/311,
Madison, WI 53792. E-mail address:
kw.davis{at}hosp.wisc.edu
4 Department of Orthopaedics, University of Rochester Medical Center, 601
Elmwood Avenue, Box 665, Rochester, NY 14560. E-mail address:
Robert_Molinari{at}urmc.Rochester.edu
5 Department of Neurosurgery, University of Wisconsin, 600 Highland Avene,
K4/834 mail 8660, Madison, WI 53792
6 The Rothman Institute, 925 Chestnut Street, 5th Floor, Philadelphia, PA
19107
7 Department of Orthopaedic Surgery, Boston University School of Medicine, 850
Harrison Avenue, Dowling 2 North, Boston, MA 02118
8 Department of Orthopedic and Neurologic Surgery, Kosair Children's Hospital,
University of Louisville, 210 East Gray Street, Suite 900, Louisville, KY
40202
9 Department of Neurosurgery, R Adams Cowley Shock Trauma Center, University of
Maryland School of Medicine, 22 South Greene Street, Suite S-12-D, Baltimore,
MD 21201. E-mail
address:baarabi{at}smail.umaryland.edu
Investigation performed at the University of Wisconsin, Madison,
Wisconsin
Disclosure: In support of their research for or preparation of this
work, one or more of the authors received, in any one year, outside funding or
grants of less than $10,000 from Medtronic. Neither they nor a member of their
immediate families received payments or other benefits or a commitment or
agreement to provide such benefits from a commercial entity. A commercial
entity (Medtronic) paid or directed in any one year, or agreed to pay or
direct, benefits of less than $10,000 to a research fund, foundation,
division, center, clinical practice, or other charitable or nonprofit
organization with which one or more of the authors, or a member of his or her
immediate family, is affiliated or associated.
Background: Systems for classifying cervical spine injury most
commonly use mechanistic or morphologic terms and do not quantify the degree
of stability. Along with neurologic function, stability is a major determinant
of treatment and prognosis. The goal of our study was to investigate the
reliability of a method of quantifying the stability of subaxial (C3-C7)
cervical spine injuries.
Methods: A quantitative system was developed in which an analog
score of 0 to 5 points is assigned, on the basis of fracture displacement and
severity of ligamentous injury, to each of four spinal columns (anterior,
posterior, right pillar, and left pillar). The total possible score thus
ranges from 0 to 20 points. Fifteen examiners assigned scores after reviewing
the plain radiographs and computed tomography images of thirty-four
consecutive patients with cervical spine injuries. The scores were then
evaluated for interobserver and intraobserver reliability with use of
intraclass correlation coefficients.
Results: The mean intraobserver and interobserver intraclass
correlation coefficients for the fifteen reviewers were 0.977 and 0.883,
respectively. Association between the scores and clinical data was also
excellent, as all patients who had a score of 7 points had surgery.
Similarly, eleven of the fourteen patients with a score of 7 points had a
neurologic deficit compared with only three of the twenty with a score of
<7 points.
Conclusions: The Cervical Spine Injury Severity Score had excellent
intraobserver and interobserver reliability. We believe that quantifying
stability on the basis of fracture morphology will allow surgeons to better
characterize these injuries and ultimately lead to the development of
treatment algorithms that can be tested in clinical trials.

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