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Purpose: This study assessed multiple pain conditions and their association with
psychosocial functioning, psychologic distress, and somatization in patients with
temporomandibular disorders (TMD) based on RDC/TMD Axis II findings. Nonspecific pain
items examined included headaches, heart/chest pain, lower back pain, nausea/abdominal
pain, and muscle pain. Materials and Methods: In this study, 202 TMD patients (58 men
and 144 women) referred to two TMD clinics participated. The mean age of the
predominantly Chinese patient population (82%) was 32.6 years (range 13 to 65). The
RDC/TMD history questionnaire was input directly into computers by patients. Graded
chronic pain and SCL-90 scales were generated online and automatically archived for
statistical analysis. Data were subjected to Spearman’s rank-order correlation and Kruskal-
Wallis and Mann-Whitney tests at a significance level of .05. Results: Of the patients, 43%
were moderately to extremely distressed by headaches. The percentage of patients who
were distressed by heart/chest pain (7%), lower back pain (26%), nausea/abdominal pain
(17%), and soreness of muscles (22%) was lower. Of the TMD patients, 16% experienced
more than three pain items. Significant and positive correlations were observed between
number of pain items experienced and graded chronic pain severity, depression, and
somatization. Correlation coefficients ranged from .27 to .65 for graded chronic pain scales
and somatization (without pain items) scores, respectively. Conclusion: Results suggest that
the number of nonspecific pain conditions reported may be a predictor of psychosocial
dysfunction, depression, and somatization. Int J Prosthodont 2002;15:461–466.
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