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Intraobserver and interobserver agreement for results of low-field magnetic resonance imaging in dogs with and without clinical signs of disk-associated wobbler syndrome.
J Am Vet Med Assoc. 2011 Jan 01; 238(1):74-80.JA

Abstract

OBJECTIVE

To determine interobserver and intraobserver agreement for results of low-field magnetic resonance imaging (MRI) in dogs with and without disk-associated wobbler syndrome (DAWS).

DESIGN

Validation study.

ANIMALS

21 dogs with and 23 dogs without clinical signs of DAWS.

PROCEDURES

For each dog, MRI of the cervical vertebral column was performed. The MRI studies were presented in a randomized sequence to 4 board-certified radiologists blinded to clinical status. Observers assessed degree of disk degeneration, disk-associated and dorsal compression, alterations in intraspinal signal intensity (ISI), vertebral body abnormalities, and new bone formation and categorized each study as originating from a clinically affected or clinically normal dog. Interobserver agreement was calculated for 44 initial measurements for each observer. Intraobserver agreement was calculated for 11 replicate measurements for each observer.

RESULTS

There was good interobserver agreement for ratings of disk degeneration and vertebral body abnormalities and moderate interobserver agreement for ratings of disk-associated compression, dorsal compression, alterations in ISI, new bone formation, and suspected clinical status. There was very good intraobserver agreement for ratings of disk degeneration, disk-associated compression, alterations in ISI, vertebral body abnormalities, and suspected clinical status. There was good intraobserver agreement for ratings of dorsal compression and new bone formation. Two of 21 clinically affected dogs were erroneously categorized as clinically normal, and 4 of 23 clinically normal dogs were erroneously categorized as clinically affected.

CONCLUSIONS AND CLINICAL RELEVANCE

Results suggested that variability exists among observers with regard to results of MRI in dogs with DAWS and that MRI could lead to false-positive and false-negative assessments.

Authors+Show Affiliations

Department of Small Animal Medicine and Clinical Biology, Faculty of Veterinary Medicine, Ghent University, 9820 Merelbeke, Belgium. sdedecker@rvc.ac.ukNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21194325

Citation

De Decker, Steven, et al. "Intraobserver and Interobserver Agreement for Results of Low-field Magnetic Resonance Imaging in Dogs With and Without Clinical Signs of Disk-associated Wobbler Syndrome." Journal of the American Veterinary Medical Association, vol. 238, no. 1, 2011, pp. 74-80.
De Decker S, Gielen IM, Duchateau L, et al. Intraobserver and interobserver agreement for results of low-field magnetic resonance imaging in dogs with and without clinical signs of disk-associated wobbler syndrome. J Am Vet Med Assoc. 2011;238(1):74-80.
De Decker, S., Gielen, I. M., Duchateau, L., Lang, J., Dennis, R., Corzo-Menéndez, N., van Bree, H. J., Van Soens, I., Binst, D. H., Waelbers, T., & Van Ham, L. M. (2011). Intraobserver and interobserver agreement for results of low-field magnetic resonance imaging in dogs with and without clinical signs of disk-associated wobbler syndrome. Journal of the American Veterinary Medical Association, 238(1), 74-80. https://doi.org/10.2460/javma.238.1.74
De Decker S, et al. Intraobserver and Interobserver Agreement for Results of Low-field Magnetic Resonance Imaging in Dogs With and Without Clinical Signs of Disk-associated Wobbler Syndrome. J Am Vet Med Assoc. 2011 Jan 1;238(1):74-80. PubMed PMID: 21194325.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Intraobserver and interobserver agreement for results of low-field magnetic resonance imaging in dogs with and without clinical signs of disk-associated wobbler syndrome. AU - De Decker,Steven, AU - Gielen,Ingrid M V L, AU - Duchateau,Luc, AU - Lang,Johann, AU - Dennis,Ruth, AU - Corzo-Menéndez,Nuria, AU - van Bree,Henri J J, AU - Van Soens,Iris, AU - Binst,Dominique H A R, AU - Waelbers,Tim, AU - Van Ham,Luc M L M, PY - 2011/1/4/entrez PY - 2011/1/5/pubmed PY - 2011/2/25/medline SP - 74 EP - 80 JF - Journal of the American Veterinary Medical Association JO - J Am Vet Med Assoc VL - 238 IS - 1 N2 - OBJECTIVE: To determine interobserver and intraobserver agreement for results of low-field magnetic resonance imaging (MRI) in dogs with and without disk-associated wobbler syndrome (DAWS). DESIGN: Validation study. ANIMALS: 21 dogs with and 23 dogs without clinical signs of DAWS. PROCEDURES: For each dog, MRI of the cervical vertebral column was performed. The MRI studies were presented in a randomized sequence to 4 board-certified radiologists blinded to clinical status. Observers assessed degree of disk degeneration, disk-associated and dorsal compression, alterations in intraspinal signal intensity (ISI), vertebral body abnormalities, and new bone formation and categorized each study as originating from a clinically affected or clinically normal dog. Interobserver agreement was calculated for 44 initial measurements for each observer. Intraobserver agreement was calculated for 11 replicate measurements for each observer. RESULTS: There was good interobserver agreement for ratings of disk degeneration and vertebral body abnormalities and moderate interobserver agreement for ratings of disk-associated compression, dorsal compression, alterations in ISI, new bone formation, and suspected clinical status. There was very good intraobserver agreement for ratings of disk degeneration, disk-associated compression, alterations in ISI, vertebral body abnormalities, and suspected clinical status. There was good intraobserver agreement for ratings of dorsal compression and new bone formation. Two of 21 clinically affected dogs were erroneously categorized as clinically normal, and 4 of 23 clinically normal dogs were erroneously categorized as clinically affected. CONCLUSIONS AND CLINICAL RELEVANCE: Results suggested that variability exists among observers with regard to results of MRI in dogs with DAWS and that MRI could lead to false-positive and false-negative assessments. SN - 0003-1488 UR - https://www.unboundmedicine.com/medline/citation/21194325/Intraobserver_and_interobserver_agreement_for_results_of_low_field_magnetic_resonance_imaging_in_dogs_with_and_without_clinical_signs_of_disk_associated_wobbler_syndrome_ L2 - https://avmajournals.avma.org/doi/10.2460/javma.238.1.74?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -