HSS Journal

, 7:218

Reliability of Determining and Measuring Acromial Enthesophytes

  • Keith M. Baumgarten
  • James L. Carey
  • Joseph A. Abboud
  • Grant L. Jones
  • John E. Kuhn
  • Brian R. Wolf
  • Robert H. Brophy
  • Charles L. Cox
  • Rick W. Wright
  • Armando F. Vidal
  • C. Benjamin Ma
  • Eric C. McCarty
  • G. Brian Holloway
  • Edwin E. SpencerJr
  • Warren R. Dunn
Original Article

Abstract

Background

Although the reliability of determining acromial morphology has been examined, to date, there has not been an analysis of interobserver and intraobserver reliability on determining the presence and measuring the size of an acromial enthesophyte.

Questions/Purposes

The hypothesis of this study was that there will be poor intraobserver and interobserver reliability in the (1) determination of the presence of an acromial enthesophyte, (2) determination of the size of an acromial enthesophyte, and (3) determination of acromial morphology.

Patients and Methods

Fifteen fellowship-trained orthopedic shoulder surgeons reviewed the radiographs of 15 patients at two different intervals. Measurement of acromial enthesophytes was performed using two techniques: (1) enthesophyte length and (2) enthesophyte–humeral distance. Acromial morphology was also determined. Interobserver and intraobserver agreement was determined using intraclass correlation and kappa statistical methods.

Results

The interobserver reliability was fair to moderate and the intraobserver reliability moderate for determining the presence of an acromial enthesophyte. The measurement of the enthesophyte length showed poor interobserver and intraobserver reliability. The measurement of the enthesophyte–humeral distance showed poor interobserver reliability and moderate intraobserver reliability. The interobserver and intraobserver reliability in determining acromial morphology was found to be moderate and good, respectively.

Conclusions

There is fair to moderate reliability among fellowship-trained shoulder surgeons in determining the presence of an acromial enthesophyte. However, there is poor reliability among observers in measuring the size of the enthesophyte. This study suggests that the enthesophyte–humeral distance may be more reliable than the enthesophyte length when measuring the size of the enthesophyte.

Keywords

enthesophyte acromion reliability morphology 

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Copyright information

© Hospital for Special Surgery 2011

Authors and Affiliations

  • Keith M. Baumgarten
    • 1
  • James L. Carey
    • 2
  • Joseph A. Abboud
    • 3
  • Grant L. Jones
    • 4
  • John E. Kuhn
    • 2
  • Brian R. Wolf
    • 6
  • Robert H. Brophy
    • 7
  • Charles L. Cox
    • 2
  • Rick W. Wright
    • 7
  • Armando F. Vidal
    • 8
  • C. Benjamin Ma
    • 9
  • Eric C. McCarty
    • 10
  • G. Brian Holloway
    • 11
  • Edwin E. SpencerJr
    • 11
  • Warren R. Dunn
    • 5
  1. 1.Sports Medicine and Shoulder Surgery SectionOrthopedic InstituteSioux FallsUSA
  2. 2.Department of Orthopaedics and RehabilitationVanderbilt University Medical CenterNashvilleUSA
  3. 3.Shoulder and Elbow Service, Department of Orthopaedic SurgeryUniversity of Pennsylvania Health SystemPhiladelphiaUSA
  4. 4.Department of Orthopaedic SurgeryThe Ohio State UniversityColumbusUSA
  5. 5.Department of Orthopaedics & Rehabilitation, Health Sciences Research CenterVanderbilt University Medical CenterNashvilleUSA
  6. 6.Department of Orthopaedic SurgeryUniversity of Iowa Hospitals and ClinicsIowa CityUSA
  7. 7.Department of Orthopaedic SurgeryWashington University School of MedicineSt. LouisUSA
  8. 8.Sports Medicine and Shoulder Service, Department of Orthopaedic SurgeryUniversity of Colorado School of MedicineDenverUSA
  9. 9.Department of Orthopaedic SurgeryUniversity of California, San FranciscoSan FranciscoUSA
  10. 10.Department of Orthopaedic SurgeryUniversity of Colorado School of MedicineDenverUSA
  11. 11.Shoulder and Elbow InstituteKnoxville Orthopaedic ClinicKnoxvilleUSA

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