Validity of a shoulder-specific quality of life questionnaire, the Western Ontario Rotator Cuff Index, for patients with scapula alata

This study is the first step evaluating content validity in the WORC Index for SA patients. The results indicated that half of the 21 items had excellent or good content validity. Several items need to be discussed by an SA team aiming to find consensus for changing or removing, leaving the possibility to develop a new quality of life measure, the first for SA patients.