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J Audiol Otol > Epub ahead of print
DOI: https://doi.org/10.7874/jao.2018.00318    [Epub ahead of print] Published online December 7, 2018.
Comparison between Subjective Scoring and Computer-Based Asymmetry Assessment in Facial Nerve Palsy
Doh Young Lee1, Hyun Seok Kim2, So Young Kim3, Kwang Suk Park4, Young Ho Kim1
1Department of Otorhinolaryngology Head and Neck Surgery, Seoul National University Boramae Medical Center, Seoul, Korea
2Interdisciplinary Program of Bioengineering, Seoul National University, Seoul, Korea
3Department of Otorhinolaryngology Head and Neck Surgery, CHA Bundang Medical Center, CHA University, Seongnam, Korea
4Department of Biomedical Engineering, College of Medicine, Seoul National University, Seoul, Korea
Correspondence  Young Ho Kim ,Tel: +82-2-870-2442, Fax: +82-2-870-3863, Email: yhkiment@gmail.com
Submitted: June 24, 2018  Accepted after revision: August 14, 2018
Background and Objectives
The aim of the present study was to assess the feasibility of a PC-based facial asymmetry assessment program (PC-FAAP) and to compare the results of PC-FAAP with subjective regional scoring by raters in acute unilateral peripheral facial nerve paralysis (FNP).
Subjects and Methods
Participants were divided into 3 groups with 8 participants per group: group I, normal; group II, mild to moderate FNP; and group III, severe FNP. Using the PC-FAAP, the mouth asymmetry ratio (MAR), eyebrow asymmetry ratio (EAR), and complete eye closure asymmetry ratio (CAR) were calculated by comparing the movement of tracking points on both sides. The FNP grading scale (FGS) integrated each score, and the scores were weighted with a ratio of 5:3:2 (MAR:CAR:EAR). Subjective regional scoring was measured on a 0-100 scale score by three otologists. PC-FAAP and subjective scoring were compared in each group regarding the consistency of the results.
The mean scores of the MAR, EAR, CAR, and FGS of each group were significantly different. PC-FAAP showed significant differences between the three groups in terms of MAR, EAC, CAR, and FGS. PC-FAAP showed more consistent results than subjective assessment (p<0.001). The PC-FAAP was significantly more consistent in group I and group III (p<0.001 and p=0.002, respectively). FGS in group III was the only parameter that showed a more consistent result in PC-FAAP than the subjective scoring (p=0.008).
An FNP grading system using a PC-based program may provide more consistent results, especially for severe forms.
Keywords: Facial nerve palsy · Assessment · Asymmetry
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