![]() ![]() Construct validity was satisfactory, as >75% of the expected correlations were met for each subscale. Both subscales demonstrated high test-retest reliability (ICC = 0.97 and ICC = 0.95 ), a SEM of 5.8% and 7.0%, and a MDC of 15% and 19% for the first and second subscale, respectively. The internal consistency was supported for activity (α = 0.78), but not for participation-psychosocial subscales (α = 0.45). The EFA identified two subscales (activity and participation-psychosocial factors). ![]() Structural validity (Exploratory Factor Analysis ), internal consistency (Cronbach’s alpha), test-retest reliability (Intraclass Correlation Coefficient ), measurement error (Standard Error of the Measurement, Minimal Detectable Change ), and construct validity (hypothesis testing with correlation of the DASH, NPRS, and SF-36) were explored. The SDQ-I scores were compared with Disabilities of the Arm, Shoulder, and Hand Questionnaire (DASH), Numerical Pain Rating Scale (NPRS), and 36-item Short Form Health Survey (SF-36). The SDQ-I was translated according to international guidelines and administered to 105 patients with SP. To cross-culturally adapt the Italian version of the SDQ (SDQ-I) and to explore its psychometric properties in patients with non-specific shoulder pain (SP). The Shoulder Disability Questionnaire (SDQ) demonstrated promising psychometric properties, but currently there is no evidence of an Italian version. ![]()
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