• Terence M Penn, Demario S Overstreet, Edwin N Aroke, Deanna D Rumble, Andrew M Sims, Caroline V Kehrer, Ava N Michl, Fariha N Hasan, Tammie L Quinn, D Leann Long, Zina Trost, Matthew C Morris, and Burel R Goodin.
• Department of Psychology, University of Alabama at Birmingham, Birmingham, Alabama.
• Pain Med. 2020 Nov 1; 21 (11): 3161-3171.

ObjectiveFor most patients with chronic low back pain (cLBP), the cause is "nonspecific," meaning there is no clear association between pain and identifiable pathology of the spine or associated tissues. Laypersons and providers alike are less inclined to help, feel less sympathy, dislike patients more, suspect deception, and attribute lower pain severity to patients whose pain does not have an objective basis in tissue pathology. Because of these stigmatizing responses from others, patients with cLBP may feel that their pain is particularly unjust and unfair. These pain-related injustice perceptions may subsequently contribute to greater cLBP severity. The purpose of this study was to examine whether perceived injustice helps explain the relationship between chronic pain stigma and movement-evoked pain severity among individuals with cLBP.MethodsParticipants included 105 patients with cLBP who completed questionnaires assessing chronic pain stigma and pain-related injustice perception, as well as a short physical performance battery for the assessment of movement-evoked pain and physical function.ResultsFindings revealed that perceived injustice significantly mediated the association between chronic pain stigma and cLBP severity (indirect effect = 6.64, 95% confidence interval [CI] = 2.041 to 14.913) and physical function (indirect effect = -0.401, 95% CI = -1.029 to -0.052). Greater chronic pain stigma was associated with greater perceived injustice (P = 0.001), which in turn was associated with greater movement-evoked pain severity (P = 0.003).ConclusionsThese results suggest that perceived injustice may be a means through which chronic pain stigma impacts nonspecific cLBP severity and physical function.© The Author(s) 2020. Published by Oxford University Press on behalf of the American Academy of Pain Medicine. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

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