Reliability and validity of non-radiological measures of thoracic kyphosis in chronic obstructive pulmonary disease

Annemarie L. Lee, Roger S. Goldstein, Matthew Rhim, Christen Chan, Dina Brooks, Karl Zabjek

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Background/Aims: Thoracic kyphosis in people with chronic obstructive pulmonary disease can be measured from digital photogrammetry or three-dimensional motion capture. This study aimed to determine the reliability, validity and agreement for non-radiological measures of thoracic kyphosis in chronic obstructive pulmonary disease. Methods: A total of 19 participants with chronic obstructive pulmonary disease were included. Cobb angles from chest radiographs and spinous process landmarks using photogrammetry and Three-dimensional motion capture were evaluated. Findings: The mean kyphosis (± standard deviation) was 48.8 ± 10.9 degrees by radiograph; 49.6 ± 12.9 degrees by three-dimensional motion capture and 52.2 ± 11.1 degrees by photogrammetry. Radiographic Cobb angle and photogrammetry measurements demonstrated excellent intra- and inter-rater reliability. Correlation between non-radiological kyphosis measurements and chest radiographs was strong (Pearsons r 2 > 0.75 for both). Limits of agreement between radiographs and 3D motion capture were -9 degrees to 7 degrees, and -12 to 8 degrees between radiographs and photogrammetry. Conclusions: Non-radiological measures of thoracic kyphosis are reliable and valid in chronic obstructive pulmonary disease.

Original languageEnglish
Pages (from-to)648-654
Number of pages7
JournalInternational Journal of Therapy and Rehabilitation
Volume25
Issue number12
DOIs
Publication statusPublished - 2 Dec 2018
Externally publishedYes

Keywords

  • Chronic obstructive pulmonary disease
  • Reliability
  • Thoracic kyphosis
  • Validity

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