The Oxford Shoulder Instability Score; validation in Dutch and first-time assessment of its smallest detectable change

Table 2 Demographic data of patients completing baseline and the reliability cohort

		Baseline assessment	Reliability cohort
		N (%)	N (%)
Mean age, year (SD)		32 (12)	32 (14)
Gender (male)		98 (71 %)	66 (66 %)
Dislocated shoulder
Right		72 (53 %)	54 (55 %)
Left		59 (43 %)	40 (40 %)
Both		6 (4 %)	5 (5 %)
Dominant side dislocated		73 (53 %)	53 (54 %)
Time first dislocation to completion OSIS
<1 month		8 (6 %)	8 (8 %)
1–6 months		21 (15 %)	17 (17 %)
>6 months–2 years		40 (29 %)	25 (25 %)
> 2 years		67 (49 %)	49 (50 %)
Sports-related traumatic instability		71 (54 %)	47 (47 %)
WOSI	(100–0)^a	46.0 (22.3)	45.7 (24.2)^b
SST	(0–12)^a	8.8 (3.1)	8.8 (3.2)^b
OSS	(48–0)^a	23.7 (7.8)	22.8 (8.3)^b
DASH	(100–0)^a	22.2 (16.7)	22.7 (18.3)^b

^aRanges reflect most impaired to least impaired function
^bNo significant change in shoulder function (WOSI, SST, OSS, DASH) was observed at re-test compared to the baseline assessment

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