Comparison of two patient-based outcome measures for shoulder instability after nonoperative treatment

Patient-reported outcomes following a physiotherapy rehabilitation programme for atraumatic posterior shoulder subluxation

“…Moser et al suggest a minimal clinically important difference for the OISS to be 7 points, whereas Kirkley et al report a clinically important change for the WOSI score to be 10.4% [12,14]. Therefore, our results suggest a significant patientreported improvement and establish the clinical effect physiotherapy rehabilitation achieved in this small group of patients with posterior instability.…”

“…The OISS has been developed and validated for shoulder instability and has also undergone testing to assess responsiveness in shoulder instability patients [12,13]. Moser et al reported that a change in score of 7 points will reflect a true change above the error rate of the questionnaire and that a change in score above 6.5 points is likely to be clinically important [12].…”

Assessing methods to specify the target difference for a randomised controlled trial: DELTA (Difference ELicitation in TriAls) review

“…Some studies reported the estimate found using both methods but did not analyse the values any further. 161,[372][373][374] Fewer studies used both methods to identify a point estimate of important change 172,367,375,376 and in at least one instance this was because there was agreement in the values found using both methods. 172,174 More often, rather than reporting point estimates, studies reported a range of values for important differences, based on all methods used.…”

Use of scoring systems for assessing and reporting the outcome results from shoulder surgery and arthroplasty

“…It has good correlation with clinical findings. Again the OSS does not assess shoulder instability [21] and, as a consequence the oxford instability score (OSIS) has been developed subsequently [22] (see below). Olley et al [20] concluded that the OSS can be used for audit purposes, however, they have suggested that larger prospective studies should be carried out to identify whether OSS varies with age, gender, and size of rotator cuff tear or not.…”

“…The OSIS [22] is based on a 5-option response (Likert scale) for each item, with each response scored from 0 to 4, with 4 being the best outcome. All questions are laid out similarly with response categories denoting least (or no) symptoms being to the left of the page (scoring 4) and those representing greatest severity lying on the right hand side (scoring 0).…”