• Maria Sandborgh, Per Lindberg, and Eva Denison.
• Department of Public Health and Caring Sciences, Section of Caring Sciences, Uppsala University, Uppsala Science Park, Sweden. maria.sandborgh@pubcare.uu.se
• J Rehabil Med. 2007 Jul 1; 39 (6): 461-6.

ObjectiveTo develop and test the ability of a screening instrument to identify subgroups among primary healthcare patients with musculoskeletal pain. The Pain Belief Screening Instrument covers pain intensity, disability, self-efficacy, fear avoidance and catastrophizing.DesignCross-sectional, correlational and comparative study.SubjectsPatients in primary healthcare (n1 = 215; n2 = 93) with a pain duration of 4 weeks or more were included.MethodsItems for the Pain Belief Screening Instrument were derived from principal component analyses of: the Self-efficacy Scale, the Tampa Scale of Kinesiophobia and the Catastrophizing subscale in the Coping Strategies Questionnaire. Cluster solutions of scores on the screening instrument and the original instruments were cross-tabulated. The reliability of items in the Pain Belief Screening Instrument was examined.ResultsThe screening instrument identified 2 groups: high- or low-risk profile for pain-related disability. Validity was in-between moderate and substantial (kappa = 0.61, p < 0.001). The reliability of each item in the Pain Belief Screening Instrument in relation to the corresponding item in the original instruments was moderate to high (rs 0.50-0.80, p < 0.01).ConclusionThe screening instrument fairly well replicated subgroups identified by the original instruments. The reliability of items in the screening instrument was acceptable. Further testing of predictive validity for a primary healthcare population is needed..

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