Staging achilles tendinopathy using ultrasound imaging: the development and investigation of a new ultrasound imaging criteria based on the continuum model of tendon pathology
Wesley Matthews, Richard Ellis, James W. Furness, Evelyne Rathbone and Wayne Hing
BMJ Open Sport & Exercise Medicine, Vol.6(1), pp.1-10
Aim: To develop a standardised ultrasound imaging (USI)-based criteria for the diagnosis of tendinopathy that aligns with the continuum model of tendon pathology. Secondary aims were to assess both the intra-rater and inter-rater reliability of the criteria.
Methods: A criteria was developed following a face validity assessment and a total of 31 Achilles tendon ultrasound images were analysed. Intra-rater and inter-rater reliability were assessed for overall tendinopathy stage (normal, reactive/early dysrepair or late dysrepair/degenerative) as well as for individual parameters (thickness, echogenicity and vascularity). Quadratic weighted kappa (k w) was used to report on reliability.
Results: Intra-rater reliability was 'substantial' for overall tendinopathy staging (k w rater A; 0.77, 95%CI 0.59 to 0.94, rater B; 0.70, 95%CI 0.52 to 0.89) and ranged from 'substantial' to 'almost perfect' for thickness (k w rater A; 0.75, 95%CI 0.59 to 0.90, rater B; 0.84, 95%CI 0.71 to 0.98), echogenicity (k w rater A; 0.78, 95%CI 0.62 to 0.95, rater B; 0.73, 95%CI 0.58 to 0.89) and vascularity (k w rater A; 0.86, 95%CI 0.74 to 0.98, rater B; 0.89, 95%CI 0.79 to 0.99). Inter-rater reliability ranged from 'substantial' to 'almost perfect' for overall tendinopathy staging (k w round 1; 0.75, 95%CI 0.58 to 0.91, round 2; 0.81, 95%CI 0.63 to 0.99), thickness (k w round 1; 0.65, 95%CI 0.48 to 0.83, round 2; 0.77, 95%CI 0.60 to 0.93), echogenicity (k w round 1; 0.70, 95%CI 0.54 to 0.85, round 2; 0.76, 95%CI 0.58 to 0.94) and vascularity (k w round 1; 0.89, 95%CI 0.79 to 0.99, round 2; 0.86, 95%CI 0.74 to 0.98). Inter-rater reliability increased from 'substantial' in round 1 (k w 0.75, 95%CI 0.58 to 0.91) to 'almost perfect' in round 2 (0.81, 95%CI 0.63 to 0.99).
Conclusion: Intra-rater and inter-rater reliability were 'substantial' to 'almost perfect' when utilising an USI-based criteria to diagnose Achilles tendinopathy. This is the first study to use the continuum model of tendon pathology to develop an USI-based criteria to diagnose tendinopathy.
Details
Title
Staging achilles tendinopathy using ultrasound imaging: the development and investigation of a new ultrasound imaging criteria based on the continuum model of tendon pathology
Creators
Wesley Matthews - Bond University
Richard Ellis - Auckland University of Technology
James W. Furness - Bond University
Evelyne Rathbone - Bond University
Wayne Hing - Bond University
Publication Details
BMJ Open Sport & Exercise Medicine, Vol.6(1), pp.1-10
Publisher
BMJ Publishing Group Ltd
Number of pages
10
Grant note
This research was supported by an Australian Government Research Training Program Scholarship.