• Javier Martinez-Calderon, Mar Flores-Cortes, Jose Miguel Morales-Asencio, and Alejandro Luque-Suarez.
• Faculty of Health Sciences, Department of Physiotherapy, University of Malaga, Malaga, Spain.. Electronic address: calderonjmc@uma.es.
• J Pain. 2019 Dec 1; 20 (12): 1394-1415.

AbstractPain-related fear is considered a strong psychological predictor for both chronic pain and disability. The aims of this study were to systematically review and critically appraise the concurrent association and the predictive value of pain-related fear affecting both pain intensity and disability in individuals with chronic musculoskeletal pain (MSK). PubMed, AMED, CINAHL, PsycINFO, PubPsych, and the grey literature were searched from inception to January 2019. Observational studies reporting cross-sectional and longitudinal associations between pain-related fear and pain intensity and/or disability were included. The GRADE criteria judged whether the overall quality and strength of the evidence was high or low in terms of risk of bias, inconsistency, indirectness, imprecision and publication bias. Seventy observational studies (97% cross-sectional) were included with a total sample of 15,623 individuals (63.56% females) with chronic MSK. Pain-related fear is composed of fear of pain, pain-related anxiety, and fear-avoidance beliefs. Greater levels of fear of pain, pain-related anxiety, and fear-avoidance beliefs were significantly associated with greater pain intensity and disability. However, the quality and strength of the evidence was very low owing to the imprecision of results, risk of bias, indirectness, and publication bias were common across the included studies. Despite these limitations, these findings highlight the potential role that pain-related fear may play in chronic MSK and disability. The field would benefit from research using higher quality studies and longitudinal designs. PERSPECTIVE: This article presents promising results about the concurrent association between pain-related fear and both pain intensity and disability in individuals with chronic MSK. Nevertheless, the overall quality and strength of the evidence was very low in terms of risk of bias, indirectness, imprecision, and publication bias. Thus, the findings should be taken with caution, and further research is needed. PROSPERO: CRD42018082018.Copyright © 2019 the American Pain Society. Published by Elsevier Inc. All rights reserved.

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