Reliability of a Novel Cobb Protractor for Measuring the Cobb Angle of Radiograph in Scoliosis

Wu Gui; Wang Hai; Ding Ran; Xue Xu-hong; Wu Zhi-hong; Qiu Gui-xing

Your Location：

Home >

Browse articles >

Reliability of a Novel Cobb Protractor for Measuring the Cobb Angle of Radiograph in Scoliosis

Chinese Medical Sciences Journal Vol. 30, Issue 1, Pages: 18-22(2015)

Orginal Article | Updated：2024-04-10

- Reliability of a Novel Cobb Protractor for Measuring the Cobb Angle of Radiograph in Scoliosis
- Affiliations：
  
  Department of Orthopaedics, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
- Author bio：
  
  *Corresponding author Tel: 86-10-69152800, Fax: 86-10-69152809, E-mail: qguixing@126.com
- Funds：
- DOI：
  CLC：
- Received：12 June 2014，
  
  Published Online：20 February 2015，
  
  Published：2015-02
- Accepted：
Scan QR Code
Wu Gui, Wang Hai, Ding Ran, et al. Reliability of a Novel Cobb Protractor for Measuring the Cobb Angle of Radiograph in Scoliosis[J]. Chinese medical sciences journal, 2015, 30(1): 18-22.
DOI：

Wu Gui, Wang Hai, Ding Ran, et al. Reliability of a Novel Cobb Protractor for Measuring the Cobb Angle of Radiograph in Scoliosis[J]. Chinese medical sciences journal, 2015, 30(1): 18-22. DOI：

摘要

Abstract

Objective

To introduce a novel Cobb protractor and assess its reliability and rapidity for measuring Cobb angle in scoliosis patients.

Methods

The novel Cobb protractor had two endplate markers. A measurement was performed just to align the two markers to each endplate of the curve. The Cobb angle on the posteroanterior radiographs of 24 patients clinically diagnosed with adolescent idiopathic scoliosis was measured by three orthopedic surgeons with both standard Cobb method and the new technique

and the time of measurement was recorded. Intraclass correlation coefficients (ICCs) were calculated to assess the reliability of the new method.

Results

The time for a measurement with the new tool was approximately 10 seconds less than the time that used to finish a measurement with the standard method (

0.05). The overall mean Cobb angle for the major curve of the 24 patients was 47.8°. The mean overall intraobserver and interobserver ICC was 0.971 and 0.971 for the Cobb method group

while the overall intraobserver ICC and the interobserver was 0.985 and 0.979 for the new tool group.

Conclusions

The novel Cobb protractor could perform quick measurement and measure almost all forms of radiographs. The Cobb protractor might be an ideal instrument to measure the Cobb angle.

关键词

Keywords

references

Cobb J. Outline for the study of scoliosis. Instr Course Lect 1948 ; 5 : 261 - 75 .

2.Gladnick BP , Schreiber JJ , Ishmael CR , et al. Assessment of vertebral curves using the Manual Post-It(R) Tech- nique . J Spinal Disord Tech , 2013 ; [Epub ahead of print].

Jacquot F , Charpentier A , Khelifi S , et al. Measuring the Cobb angle with the iPhone in kyphoses: A reliability study. Int Orthop 2012 ; 36 : 1655 - 60 .

De Vriendt T , Clays E , et al. Reliability and validity of the Adolescent Stress Questionnaire in a sample of European adolescents—the HELENA study. BMC public health 2011 ; 11 : 717 .

Shaw M , Adam CJ , Izatt MT , et al. Use of the iPhone for Cobb angle measurement in scoliosis. Eur Spine J 2012 ; 21 : 1062 - 8 .

Weinstein SL , Ponseti IV. Curve progression in idiopathic scoliosis. J Bone Joint Surg Am 1983 ; 65 : 447 - 55 .

Morrissy RT , Goldsmith GS , Hall EC , et al. Measurement of the Cobb angle on radiographs of patients who have scoliosis. Evaluation of intrinsic error. J Bone Joint Surg Am 1990 ; 72 : 320 - 7 .

Qiao J , Liu Z , Xu L , et al. Reliability analysis of a smartphone-aided measurement method for the Cobb angle of scoliosis. J Spinal Disord Tech 2012 ; 25 : E88 - 92 .

Gstoettner M , Sekyra K , Walochnik N , et al. Inter- and intraobserver reliability assessment of the Cobb angle: Manual versus digital measurement tools. Eur Spine J 2007 ; 16 : 1587 - 92 .

Zhang J , Lou E , Hill DL , et al. Computer-aided assessment of scoliosis on posteroanterior radiographs. Med Biol Eng Comput 2010 ; 48 : 185 - 95 .

Rosenfeldt MP , Harding IJ , Hauptfleisch JT , et al. A comparison of traditional protractor versus Oxford Cobbometer radiographic measurement: Intraobserver measurement variability for Cobb angles. Spine 2005 ; 30 : 440 - 3 .

Langensiepen S , Semler O , Sobottke R , et al. Measuring procedures to determine the Cobb angle in idiopathic scoliosis: A systematic review. Eur Spine J 2013 ; 22 : 2360 - 71 .

Tanure MC , Pinheiro AP , Oliveira AS. Reliability assessment of Cobb angle measurements using manual and digital methods. Spine J 2010 ; 10 : 769 - 74 .

Allen S , Parent E , Khorasani M , et al. Validity and reliability of active shape models for the estimation of Cobb angle in patients with adolescent idiopathic scoliosis. J Digital Imaging 2008 ; 21 : 208 - 18 .

Oda M , Rauh S , Gregory PB , et al. The significance of roentgenographic measurement in scoliosis. J Pediatr Orthop 1982 ; 2 : 378 - 82 .

Views

1603

Downloads

CSCD

Alert me when the article has been cited

Submit

Publicity Resources

No data

Related Author

No data

Related Institution

No data

⁰