title: Evaluation of the Instability Severity Index Score and the Western Ontario Shoulder Instability Index as predictors of failure following arthroscopic Bankart repair.
abstract: In this study we evaluated whether the Instability Severity Index Score (ISIS) and the Western Ontario Shoulder Instability Index (WOSI) could detect those patients at risk of failure following arthroscopic Bankart repair. Between April 2008 and June 2010, the ISIS and WOSI were recorded pre-operatively in 110 patients (87 male, 79%) with a mean age of 25.1 years (16 to 61) who underwent this procedure for recurrent anterior glenohumeral instability. A telephone interview was performed two-years post-operatively to determine whether patients had experienced a recurrent dislocation and whether they had returned to pre-injury activity levels. In all, six (5%) patients had an ISIS > 6 points (0 to 9). Of 100 (91%) patients available two years post-operatively, six (6%) had a recurrent dislocation, and 28 (28%) did not return to pre-injury activity. No patient who dislocated had an ISIS > 6 (p = 1.0). There was no difference in the mean pre-operative WOSI in those who had a re-dislocation and those who did not (p = 0.99). The pre-operative WOSI was significantly lower (p = 0.02) in those who did not return to pre-injury activity, whereas the ISIS was not associated with return to pre-injury activity (p = 0.13). In conclusion, neither the pre-operative ISIS nor WOSI predicted recurrent dislocation within two years of arthroscopic Bankart repair. Patients with a lower pre-operative WOSI were less likely to return to pre-injury activity.
authors.affiliation: Department of Surgery, University of Alberta, 6-110 CSB, 8440-112 Street, Edmonton, Alberta, T6G 2B7, Canada.
authors.forename: M
authors.initials: M
authors.lastname: Bouliane
authors.affiliation: Department of Surgery, University of Alberta, 6-110 CSB, 8440-112 Street, Edmonton, Alberta, T6G 2B7, Canada.
authors.forename: D
authors.initials: D
authors.lastname: Saliken
authors.affiliation: Department of Physical Therapy, University of Alberta, 2-50 Corbett Hall, Edmonton, Alberta, T6G 2G4, Canada.
authors.forename: L A
authors.initials: LA
authors.lastname: Beaupre
authors.affiliation: Alberta Health Services, 6-110 CSB, 8440-112 Street, Edmonton, Alberta, T6G 2B7, Canada.
authors.forename: A
authors.initials: A
authors.lastname: Silveira
authors.affiliation: Alberta Health Services, 6-110 CSB, 8440-112 Street, Edmonton, Alberta, T6G 2B7, Canada.
authors.forename: M K
authors.initials: MK
authors.lastname: Saraswat
authors.affiliation: Department of Surgery, University of Alberta, 6-110 CSB, 8440-112 Street, Edmonton, Alberta, T6G 2B7, Canada.
authors.forename: D M
authors.initials: DM
authors.lastname: Sheps
mesh_terms: D000293:Adolescent; D000328:Adult; D001182:Arthroscopy / Q000379:methods*; D005260:Female; D006801:Humans; D007407:Interviews as Topic; D007593:Joint Instability / Q000175:diagnosis / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009864:Ontario; D012008:Recurrence; D012720:Severity of Illness Index; D012785:Shoulder Joint; D016896:Treatment Outcome
keywords: Outcome Measures; Shoulder Instability; Recurrent Dislocation