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Simplified Jaw Functional Limitation Scale for Temporomandibular Disorders: Psychometric Evaluation
Ruonan Sun1,2, Tiqian Liu1, Yiwei Liu2
1State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
Oral Diseases
|January 10, 2025
Summary
A simplified 4-item Jaw Functional Limitation Scale (JFLS) was developed and validated for assessing temporomandibular disorders (TMD). This new JFLS version shows good reliability and validity, streamlining jaw function evaluation in primary care.
Area of Science:
- Oral health research
- Clinical assessment tools
- Patient-reported outcomes
Background:
- Temporomandibular disorders (TMD) significantly impact jaw function.
- Accurate assessment of jaw functional limitation is crucial for effective TMD management.
- Existing scales may require simplification for efficient clinical use.
Purpose of the Study:
- To simplify the Jaw Functional Limitation Scale (JFLS).
- To evaluate the reliability and validity of a shortened JFLS (JFLS-4) in patients with TMD.
- To assess the JFLS-4's utility in primary care settings.
Main Methods:
- The study involved 671 participants (502 TMD patients, 169 controls) assessed using Diagnostic Criteria for Temporomandibular Disorders (DC/TMD).
- The 8-item JFLS (JFLS-8) was administered, followed by item reduction to create a 4-item JFLS (JFLS-4).
- Confirmatory and exploratory factor analyses, reliability (Cronbach's alpha), and validity (Kaiser-Meyer-Olkin, Bartlett's test) were performed.
Main Results:
- The JFLS-8 showed satisfactory fit in TMD patients.
- The JFLS-4 retained items with high factor loadings.
- The JFLS-4 demonstrated good reliability (Cronbach's alpha = 0.714) and validity (KMO = 0.558).
Conclusions:
- A validated 4-item JFLS (JFLS-4) was successfully developed.
- The JFLS-4 is a reliable and valid tool for assessing mandibular function in TMD patients.
- This simplified scale can streamline clinical evaluation of jaw function in TMD.
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