Background and aims: Psychosocial factors such as negative attitudes and beliefs, depression and anxiety are associated with increased disability and loss of work productivity. The purpose of this study was to examine the reliability and construct validity of a recently developed screening tool, the Optimal Screening for Prediction of Referral and Outcome (OSPRO) which incorporates multiple psychosocial factors in one questionnaire. Methods: This was a case-control study. The study group involved injured workers with an active compensation claim for a shoulder injury.   The control group was comprised of patients without a work-related shoulder injury. We examined reliability (internal consistency, test-retest) and validity (factorial, convergent and known-group). The Hospital Anxiety and Depression Scale (HADS), the QuickDASH and the short Örebro Musculoskeletal Pain Screening Questionnaire (ÖMPSQ-10) were used for comparison.  Results: Data of 240 patients (80 cases, 160 controls), mean age=51(12), 93 (39%) females, and 147 (61%) males were analyzed. The test-retest reliability was moderate to perfect for 10 items with high (>0.80) Cronbach Coefficient Alphas. The 10-item OSPRO-YF questionnaire had three distinct domains as conceptualized by the developers. The associations between the items and the similar theoretically derived scales were moderate to high and in the expected direction. All items of the OSPRO-YF were able to differentiate between patients with and without the work-related compensation (p values ranging from 0.028 to <0.0001).  Conclusions: The 10-item OSPRO-YF demonstrated acceptable test-retest and internal consistency, reliability and factorial, convergent and known-group validity and may enhance identification of individuals at risk for pain-related psychological distress.

TEST-RETEST RELIABILITY AND CONSTRUCT VALIDITY OF THE OPTIMAL SCREENING FOR PREDICTION OF REFERRAL AND OUTCOME YELLOW FLAGS (OSPRO-YF) IN PATIENTS WITH SHOULDER PATHOLOGY