Reliability And Validity Of The Orofacial Aesthetic Scale

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Reliability And Validity Of The Orofacial Aesthetic Scale

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Title Reliability And Validity Of The Orofacial Aesthetic Scale
Author(s) Larsson, Pernilla ; John, Mike ; Nilner, Krister ; List, Thomas
Date 2010
English abstract
Objectives: This study evaluated reliability and validity of the Orofacial Aesthetic Scale (OAS)—an instrument assessing self-reported orofacial aesthetics in prosthodontic patients. Methods: The OAS has 7 items addressing direct aesthetical impacts in the orofacial region and an 8th global assessment item. Response format is a 0 to 10 numeric rating scale (”Very dissatisfied” to ”Very satisfied” with appearance). OAS summary scores range from 0 (worst score) to 70 (best score). Test-retest reliability (n=27) and internal consistency (n=119) were assessed. Content validation (asking patients about their satisfaction with the questionnaire content, n=119) and discriminative validation (comparing OAS scores between patients and healthy controls, n=119) were performed. Convergent validity was assessed by correlating patients' own OAS scores (n=29) with ratings from a consensus expert group (n=4) and with the Oral Health Impact Profile (OHIP) aesthetic-item summary score (n=119). Results: Test-retest reliability was excellent for the OAS scores (intraclass correlation coefficient = .96). Internal consistency was satisfactory for aesthetically impaired patients (n=27, Cronbach's alpha=.86). Patients rated their satisfaction with the questionnaire content as 7.8±1.3 units on a 0 to 10 numeric rating scale (0=very dissatisfied, 10=very satisfied). OAS scores discriminated aesthetically impaired patients (31.4 units) from healthy controls (45.9 units, P<0.001). OAS scores correlated well with other measures of the same construct (r=.43 for patients' own assessment with an assessment by experts using OAS, r=-.72 for a correlation with OHIP's 3 aesthetic-related items). Conclusion: The Orofacial Aesthetic Scale, developed especially for prosthodontic patients, exhibited good score reliability and validity.
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Pages Abstract number: 3624
Language eng (iso)
Subject(s) Medicine
Research Subject Categories::ODONTOLOGY
Note IADR, (International Association for Dental Research), Barcelona, Spain 14-17 juli 2010
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