Reproducibility of 6- and 4-category faces pain scale to the assessment of temporomandibular joint pain and muscle in school-age children
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The aim of this study was to compare the levels of reproducibility between two Faces Pain Scales (FPS) of 6 and 4 categories to the assessment of pain intensity on children with and without Temporomandibular joint and muscle pain.
Material and methods
A total of 29 children were recruited: 13 symptomatic (9.79 ± 1.36 years old) and 16 asymptomatic (8.69 ± 0.87 years old). One previously-trained examiner applied manual palpation to evaluate orofacial structures, and FPS to assess pain intensity. All children were initial evaluated using 6-category FPS and after 3 days using 4-category FPS. The children were assessed after a seven day time interval from initial and second sessions. Weighted Kappa coefficient was used to verify reproducibility levels.
Similar levels of reproducibility (moderate and fair kappa values) have been verified with the application of the 6-category FPS on symptomatic and asymptomatic children. Similar results were verified using 4-category FPS on symptomatic and asymptomatic children (poor and fair kappa values).
Higher levels of reproducibility were verified with the application of the 6-category FPS in both groups and considering symptomatic and asymptomatic as single group. In this way, the 6-category FPS should be preferred over the 4-category FPS to assess pain intensity on children’s orofacial structures.
KeywordsReproducibility Pain scale Children Temporomandibular disorders
The authors acknowledge FAPESP (São Paulo State Research Foundation) for financial support to this study (Grants #2003/07771-0) and CAPES (Master degree scholarship).
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