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KMID : 0355220080330040323
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Journal of Korean Academy Oral Medicine
2008 Volume.33 No. 4 p.323 ~ p.338
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Reliability of the Korean Version of Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD)
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Sohn Byung-Jin
Park Min-Woo
Park Ji-Woon
Chung Sung-Chang
Chung Jin-Woo
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Abstract
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Objective: The aim of this study was to analyze the reliability of the Korean language version of the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) axis II questionnaire among TMD patients.
Methods: The Korean version of the RDC/TMD questionnaire was distributed to 154 TMD patients (31 men, 123 women) who visited Seoul National University Dental Hospital. The test-retest reliability was also assessed among the same subjects with a one- or two-week time interval. The subjects did not receive any form of therapy until the retest administration was completed.
Results: The internal consistency reliability of pain intensity, disability score, jaw disability, and psychosocial status were 0.92, 0.94, 0.68, and 0.94, respectively using the Cronbach’s alpha coefficient of the 1st test. Test-retest reliability coefficients of each items of the questionnaire ranged from 0.40 to 0.94 assessed with kappa value, and the intra-class correlation coefficient (ICC) for each subscale ranged from 0.81 to 0.93. Test-retest reliability coefficient of the graded chronic pain (GCP) scale was 0.63.
Conclusions: The Korean language version of RDC/TMD axis II questionnaire demonstrated good reliability. It can be used as a valuable instrument for the analyses of the psychosocial aspects of the TMD patients in Korea.
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KEYWORD
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RDC/TMD, Questionnaire, Test-retest, Internal consistency, Reliability
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