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Assessment of shoulder osteoarthritis severity (SOAS) scoring system

Assessment of shoulder osteoarthritis severity (SOAS) scoring system Assessment of shoulder osteoarthritis severity (SOAS) scoring system
Assessment of shoulder osteoarthritis severity (SOAS) scoring system Assessment of shoulder osteoarthritis severity (SOAS) scoring system

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SOAS system may be helpful in MRI research studies of shoulder as it is efficacious in determining the scores of osteoarthritis changes in shoulder and their further progression.

A semi quantitative MRI-based shoulder osteoarthritis severity (SOAS) assessment method emerges as a significant scoring method to evaluate the extremity of shoulder osteoarthritis (OA), evident from the results of study published in the ‘Journal of Magnetic Resonance Imaging.’

The shoulder OA is a severe case of arthritis that causes intense pain and disability. The impediment of shoulder OA related degenerative changes is achieved via various surgical procedures. But, there is no MRI-based scoring system available, which can be used to rate osteoarthritis-related changes after the implementation of the treatment. Therefore, Pia M. Jungmann and colleagues assessed semi quantitative MRI-based shoulder osteoarthritis severity (SOAS) scoring method by conducting a retrospective analysis among 60 patients. These patients equally grouped into four classes of radiographic grades of OA. A SOAS scoring method from range 0 (no OA) to 100 (most critical OA) was established by considering the shoulder MRIs.

A total of six readers assessed the MRIs. The cartilage, joint capsule, acromion, labral-bicipital-complex, rotator cuff and osseous findings were evaluated for severity of degeneration. Radiographic Kellgren-Lawrence (KL), Samilson and Hamada gradings showed a significant association with SOAS scores. The methods of statistical analysis used in the analysis was t-tests, receiver-operating characteristics (ROC), interclass correlation coefficients (ICC) and Pearson correlations.

An excellent inter (ICC 0.96–0.98) and intra-reader (ICC = 0.99) agreement was noticed for SOAS score. A significant association of SOAS was seen with KL and Samilson scores (R = 0.82; p<0.001). The osseous findings and cartilage exhibited the higher association with Samilson scores (R = 0.86, 0.82; respectively with p<0.001). Also, the SOAS scores were different for different Samilson grades; 0, 1, 2 and 3. Overall, SOAS ability to determine incident radiographic shoulder OA (AUC = 0.91) was outstanding. As per study outcomes, semi quantitative MRI-based SOAS score system shows excellent reliability to rate shoulder OA severity and related structure-specific degeneration.

Source:

J Magn Reson Imaging

Article:

Reliable semi quantitative whole-joint MRI score for the shoulder joint: The shoulder osteoarthritis severity (SOAS) score

Authors:

Pia M. Jungmann et al.

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