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Reliability of a craniomandibular index
1Department of Oral and Maxillofacial Surgery, University of Minnesota School of Dentistry, Minneapolis 55455.
Journal of Dental Research
|November 1, 1986
Summary
The Craniomandibular Index (CMI) reliably measures temporomandibular joint (TMJ) dysfunction. Its objective criteria and simple methods ensure consistent results for clinical and epidemiological studies.
Area of Science:
- Dentistry
- Biomedical Engineering
- Clinical Research
Background:
- Temporomandibular joint (TMJ) disorders present diagnostic challenges.
- Standardized instruments are needed for epidemiological and clinical outcome studies of TMJ dysfunction.
- The Craniomandibular Index (CMI) was developed to address these needs.
Purpose of the Study:
- To evaluate the reliability of the Craniomandibular Index (CMI).
- To assess the consistency of CMI measurements between different raters (inter-rater) and over time by a single rater (intra-rater).
Main Methods:
- The CMI, comprising a Dysfunction Index and a Palpation Index, was used.
- Inter-rater reliability was assessed with three raters.
- Intra-rater reliability was assessed with 19 patients examined twice by one rater.
Main Results:
- High intraclass correlation coefficients (ICCs) were found for inter-rater reliability (Dysfunction Index: 0.84, Palpation Index: 0.87, CMI: 0.95).
- High correlation coefficients were found for intra-rater reliability (Dysfunction Index: 0.92, Palpation Index: 0.86, CMI: 0.96).
- These results indicate strong reliability for the CMI.
Conclusions:
- The Craniomandibular Index (CMI) demonstrates high inter-rater and intra-rater reliability.
- The CMI is a reliable instrument for assessing TMJ dysfunction in research and clinical settings.
- Adherence to strict methodological guidelines is crucial for ensuring accuracy and reproducibility.