Response shift of the Western Ontario Rotator Cuff index in patients undergoing arthroscopic rotator cuff repair.

Journal of shoulder and elbow surgery / American Shoulder and Elbow Surgeons ... [et al.]

PubMedID: 27424250

Hollman F, Wessel RN, Wolterbeek N. Response shift of the Western Ontario Rotator Cuff index in patients undergoing arthroscopic rotator cuff repair. J Shoulder Elbow Surg. 2016;.
HYPOTHESIS
This study determined the response shift in patients undergoing rotator cuff repair using the Western Ontario Rotator Cuff index (WORC), a disease-specific quality of life questionnaire. We hypothesized there would be a response shift with a positive recalibration (overestimated their preoperative disability) on the WORC and increases over time.

METHODS
The study prospectively included 36 patients undergoing arthroscopic rotator cuff repair. At baseline, 3 months (T1), and 1 year (T2) after surgery the WORC, EuroQol (EQ)-5D-3L, and the patient's level of satisfaction after surgery were scored. To evaluate the response shift, patients also completed the WORC at 3 months (Pre-T1) and 1 year (Pre-T2) as how they perceived themselves to have been before surgery.

RESULTS
The result on Pre-T1 and Pre-T2 results revealed that patients retrospectively rated their overall WORC score comparable with the baseline WORC score (Pre-T0; T0?=?40.5?±?18.4, Pre-T1?=?45.0?±?22.7, Pre-T2?=?34.3?±?21.3). No response shift was observed on all domains except a negative recalibrated response shift for emotional disability on T1 (P?=?.04).

CONCLUSIONS
No significant group-level response shift was observed using the WORC, except for the subdomain emotional disability at 3 months after arthroscopic rotator cuff repair. With the absence of any shift in patient's perception on the self-administered quality of life-related WORC questionnaire, this study suggests one could retrospectively reliably conduct group-level preoperative baseline information on quality of life up to 1 year after surgery.