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Aims: To examine the relationship between depression and somatization
and pain during muscle and joint palpation as well as limitations
related to mandibular functioning (LRMF) in patients with
temporomandibular disorders. Methods: The Research Diagnostic
Criteria for Temporomandibular Disorders (RDC/TMD) data for
Axes I and II for 196 consecutive patients (56 men and 140
women) with a history of facial pain were obtained. The mean age
of the predominantly Chinese patient population (83.2%) was
33.4 years (range 18 to 55 years). A computerized diagnostic system
was used to collect the RDC/TMD history data. The Symptom
Check List (SCL-90) depression and somatization scales were generated
on-line and archived. The mean muscle pain (MP), joint
pain (JP), and LRMF scores were computed with depression and
somatization as main effects. Data were subjected to analysis of
variance (Scheffé test) and Pearson’s correlation at a significance
level of .05. Results: Depression scores ranged from 4.03 to 8.16
(MP), from 0.67 to 1.03 (JP), and from 0.30 to 0.38 (LRMF);
somatization scores ranged from 2.64 to 7.75 (MP), from 0.58 to
1.00 (JP), and from 0.30 to 0.41 (LRMF). Interaction effects
between depression and somatization were not significant. Patients
with severe depression had significantly higher MP scores than
normal patients or patients with moderate depression. Patients
with moderate and severe somatization had significantly higher
MP scores than normal patients. LRMF scores of patients with
severe somatization were significantly greater than those who were
normal or suffered from moderate somatization. No significant
difference in JP scores was observed for depression and somatization
scales. Correlations between depression/somatization and MP,
JP, and LRMF scores were significant and positive but weak; coefficients
ranged from 0.15 to 0.41. Conclusion: The results suggest
that depression and somatization are related to the self-report of
MP. In addition, severe somatization may be associated with an
increase in jaw disability. J OROFAC PAIN 2004;18:220–225
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