• J A Turner, S F Dworkin, L Mancl, K H Huggins, and E L Truelove.
• Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine, WA, Seattle 98195, USA. jturner@u.washington.edu
• Pain. 2001 May 1;92(1-2):41-51.

AbstractPain-related beliefs, catastrophizing, and coping have been shown to be associated with measures of physical and psychosocial functioning among patients with chronic musculoskeletal and rheumatologic pain. However, little is known about the relative importance of these process variables in the functioning of patients with temporomandibular disorders (TMD). To address this gap in the literature, self-report measures of pain, beliefs, catastrophizing, coping, pain-related activity interference, jaw activity limitations, and depression, as well as an objective measure of jaw opening impairment, were obtained from 118 patients at a TMD specialty clinic. Controlling for age, gender, and pain intensity, significant associations were found between (1) pain beliefs and activity interference, depression, and non-masticatory jaw activity limitations, (2) catastrophizing and activity interference, depression, and non-masticatory jaw activity limitations, and (3) coping and activity interference and depression. Controlling for age, gender, pain intensity, and the other process variables, significant associations were found between (1) beliefs and activity interference and depression, and (2) catastrophizing and depression. No process variable was associated significantly with the objective measure of jaw impairment. The results suggest that for patients with moderate or high levels of TMD pain and dysfunction, beliefs about pain play an important role in physical and psychosocial functioning.

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