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

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

中国医学科学杂志（英文版） 2015年30卷第1期页码：18-22

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：
  中图分类号：
- 收稿日期：2014-06-12，
  
  网络出版日期：2015-02-20，
  
  纸质出版日期：2015-02
- Accepted：
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Reliability of a Novel Cobb Protractor for Measuring the Cobb Angle of Radiograph in Scoliosis[J]. 中国医学科学杂志（英文版）, 2015,30(1):18-22.

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.
Reliability of a Novel Cobb Protractor for Measuring the Cobb Angle of Radiograph in Scoliosis[J]. 中国医学科学杂志（英文版）, 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

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