Cross-cultural adaptation of the Avoidance of Daily Activities Photo Scale for Turkish patients with shoulder pain: Reliability and validity assessment according to the COSMIN guideline

Context: People with chronic or long-term pain may develop various psychosocial symptoms such as fear and avoidance of behavior due to pain. Reliable and valid quality of life tools must be available in Turkish to specifically assess avoidance of behavior in people with shoulder pain.

Objectives: This study aimed to translate and culturally adapt the Avoidance of Daily Activities Photo Scale for Patients with Shoulder Pain and to evaluate the psychometric properties of its Turkish version (ADAP-Tr) in patients with shoulder pain.

Methods: Translation, adaptation, and validation were performed according to the COSMIN (COnsensus-based Standards for the selection of health Measurement INstruments) guidelines. The internal consistency, reliability, construct validity, and discriminant validity of the ADAP-Tr were tested. The Pain Catastrophizing Scale (PCS), Tampa Scale for Kinesiophobia (TSK), and Shoulder Pain and Disability Index (SPADI) were applied for validation purposes.

Results: The study included a total of 162 participants with shoulder pain. The internal consistency of the ADAP-Tr showed excellent reliability with a Cronbach's α of 0.94 and a test-retest assessment of 0.88 ICC (95% CI, 0.83-0.91). The standard error of measurement was 1.85 points, and the minimal detectable change was determined 5.12 points. There was a low to high correlation among the ADAP-Tr and PCS (r = 0.481, p < .001), TSK (r = 0.448, p < .001), and SPADI (r = 0.826, p < .001) scores.

Conclusions: The ADAP-Tr was shown to be a valid and strong reliability tool to use in clinical and research settings as a shoulder-specific measurement tool.