Psychometric properties of the Turkish version of L'Insalata Shoulder Rating Questionnaire

Abstract

Purpose The aim of this study was to examine the psychometric properties of the culturally adapted Turkish version of the L’Insalata Shoulder Rating Questionnaire (TrLSRQ). Materials and methods Comprehensibility and content validity of the TrLSRQ were tested on 14 patients and seven physiotherapists, respectively. Subsequently, 90 volunteer patients with shoulder pain completed the TrLSRQ twice within a week for test–retest analysis. Correlations with Shoulder Pain and Disability Index (SPADI), Oxford Shoulder Score (OSS), Penn Shoulder Score (PSS), and Upper Extremity Functional Index (UEFI) were used to assess convergent validity; and pain intensity and active range of shoulder motions were measured to assess criterion validity. Results Content validity index of the TrLSRQ was 0.99. The internal consistency was high (Cronbach’s α = 0.89); and item-total correlations were 0.37–0.74. In test–retest analysis, ICC values were 0.65–0.95 for all items; and 0.86–0.94 for the subcategories. The TrLSRQ scores were positively correlated with UEFI, and negatively correlated with other scales (p < 0.05). Its correlations with the intensity of pain and shoulder range of motions (p < 0.05) indicated that the questionnaire had good criterion validity. Conclusions The TrLSRQ is a reliable and valid measure to assess pain, activities of daily living, sports/recreation, and work in patients with shoulder pain. Implications for Rehabilitation Patient-reported outcome measures (PROMs) are important tools to assess the impact of health problems on overall well-being of the patients. The Turkish version of the L’Insalata Shoulder Rating Questionnaire (TrLSRQ) is a PROM that evaluates the impact of shoulder problems on patient's pain, daily activities, sportive/recreational activities, and work; as well as overall satisfaction with his/her shoulder, and ranking of areas in which the patient likes to see improvement. The TrLSRQ scores are well correlated with other relevant PROMs, as well as with the intensity of pain and shoulder range of motions. The TrLSRQ is a reliable and valid measure, which can be used for both clinical and research purposes to evaluate symptoms and functional status of patients with shoulder pain.