Validation of the Turkish Version of the Facial Nerve Grading System 2.0.

OBJECTIVE: We aimed to adapt the Facial Nerve Grading System 2.0 (FNGS 2.0) to Turkish and to investigate the validity and the reliability of the Turkish version. METHODS: The original FNGS 2.0 was translated into Turkish and validated by international standards. Six Turkish physicians, three specialists and three residents, independently rated the videos, two times each, of 40 adult facial palsy patients. Inter-rater and intra-rater reliability were assessed using the intraclass correlation coefficient (ICC) and Cronbach's alpha coefficient. As another indication of reliability, "generalizability" was also evaluated. For all analyses, a p value of