Functional outcomes assessment in shoulder surgery

Table 2 Condition specific shoulder measures

Instability	Description	Validity	Reliability	Responsiveness	MCID
WOSI[62,65,84]	21 items: Physical symptoms (10) Sport/recreation/work function (4) Lifestyle function (4) Emotional function (3) Score: 0-2100 (Lower = Better) (can be converted into 0%-100% scale)	Content validity: Items established by experts and patients Criterion validity: Excellent Correlate: VAS Function and DASH, good with CMS and Rowe	Excellent ICC: 0.87-0.98	Excellent Effect size: 1.67 for stabilization	220/2100
OSIS[28,62]	12 Items: Score: 12-60 (Lower = Better)	Criterion validity: Correlated with rowe and constant scores	Excellent PCC: 0.97	Very good Effect size: 0.8	Not reported
MIIS[62,66]	22 items: Pain (4) Instability (5) Function (8) Occupation and sports (5) Score: 0-100 (lower = better)	Criterion validity: Low to moderate correlation with shoulder rating questionnaire. Otherwise untested	Excellent ICC: 0.98	Not reported	Not reported
Rowe score[63,64]	3 items: Stability (50 points) Motion (20 points) Function (30 points) Score: 0-100 (both subjective and examination dependant)	Content Validity: poorly described development and methodology Criterion Validity: Correlated with WOSI and CMS	Fair ICC 0.7	Very good Effect size 1.2	Not reported
Rotator cuff
WORC[69]	21 items: Physical symptoms (10 items) Sport/recreation/work function (4 items) Lifestyle function (4 items) Emotional function (3 items) Score: 0-2100 (Lower = Better) (can be converted into 0%-100% scale)	Content validity: Items established by experts and patients Criterion validity: Correlated with ASES, DASH and UCLA	Excellent ICC: 0.96	Excellent Effect size: 0.96	245/2100
RCQoL[85]	34 items: Symptoms and physical complaints (16 items) Sport/recreation (4 items) Work related concerns (4 items) Lifestyle issues (5 items) -Social and Emotional Issues (5 items) Score: 0-3400 (Lower = Worse) (can be converted into 0-100 scale)	Content validity: Items established by experts and patients Criterion validity: Correlated with ASES. Construct validity: able to differentiate large and massive tears	Poor ICC: Not reported Reported as average difference of final score = 5%	Excellent Effect size: Not reported SRM: 1.43	Not reported

WOSI: The Western Ontario Shoulder Instability Index; OSIS: The Oxford Shoulder Instability Score; MIIS: The Melbourne Instability Shoulder Scale; WORC: The Western Ontario rotator cuff index; RCQoL: Rotator cuff quality-of-life measure; MCID: Minimum clinically important difference; ICC: Intraclass correlation coefficient; VAS: Visual analog scale; SRM: Standardized response mean.