Measurement properties of the Western Ontario Shoulder Instability Index in Dutch patients with shoulder instability

Table 5 Floor and ceiling effects and the smallest detectable change in the WOSI

N = 138	Absolute floor	Absolute ceiling	SDC	SDC- range from		% of patients scoring within SDC -range
WOSI				Floor	Ceiling	Floor	Ceiling
total	No	No	23.0	0-23	77-100	17%	5%
Domain
physical	No	No	23.1	0-23.1	76.9-100	3%	26%
sp/rec/wrk	No	No	26.0	0-26	74.0-100	23%	20%
lifestyle	No	No	24.4	0-24.4	74.6-100	9%	25%
emotion	No	No	28.1	0-28.1	71.9-100	41%	10%

From left to right are presented; absolute floor and ceiling scores. The smallest detectable change (SDC) with its ranges, and the percentage of scores that fell within the SDC-range for both extremes. Scores are presented for the total WOSI score and all WOSI subdomains.

ISSN: 1471-2474