The aim of this study was to investigate the psychometric properties of the Oro-facial
Esthetic Scale among Chinese-speaking patients. The original Oro-facial Esthetic Scale
was cross-culturally adapted in accordance with the international standards to develop
a Chinese version (OES-C). Unlike the original Oro-facial Esthetic Scale, the version
employed in this study used a 5-point Likert scale with items rated from unsatisfactory
to most satisfactory. Psychometric evaluation included the reliability and validity
of the OES-C. The reliability of the OES-C was determined through internal consistency
and test-retest methods. The validity of OES-C was analysed by content validity, discriminative
validity, construct validity and convergent validity. The corrected item-total correlation
coefficients of the OES-C ranged from 0·859 to 0·910. The inter-item correlation coefficients
between each two of the eight items of the OES-C ranged from 0·766 to 0·922. The values
of ICC ranged from 0·79 (95% CI = 0·54-0·98) to 0·93 (95% CI = 0·87-0·99), indicating
an excellent agreement. Construct validity was proved by the presence of one-factor
structure that accounted for 83·507% of the variance and fitted well into the model.
Convergent validity was confirmed by the association between OES-C scores and self-reported
oral aesthetics and three questions from the Oral Health Impact Profile related to
aesthetics (correlation coefficients ranged from -0·830 to -0·702, P < 0·001). OES-C
scores discriminated aesthetically impaired patients from healthy controls. This study
provides preliminary evidence concerning the reliability and validity of the OES-C.
The results show that the OES-C may be a useful tool for assessment of oro-facial
esthetics in China.