Prevalence and associated factors of facial palsy and lifestyle characteristics: data from the Korean National Health and Nutrition Examination Survey 2010-2012.

OBJECTIVES: To report the nationwide prevalence of facial palsy (FP) of grade III or worse in the House-Brackmann (H-B) grading system in South Korea and assess the associated factors. DESIGN: Cross-sectional analysis of a nationwide health survey. SETTINGS: South Korea. METHODS: We obtained data from the 2010 to 2012 Korea National Health and Nutrition Examination Surveys, which were cross-sectional surveys of the South Korean civilian population living in households and aged >/=1 year (N=23 533). A field survey team performed interviews, physical examinations and laboratory tests. Facial expression was evaluated based on the H-B grading system. RESULTS: Among the population aged >/=1 year, the prevalence of FP of grade III or worse in the H-B grading system was 0.12% (95% CI 0.07% to 0.17%). FP was more prevalent in women (p=0.01) and the prevalence rate increased with age (p<0.001). In participants aged >/=19 years, age, female gender, history of cardiovascular disease and the serum total cholesterol level were associated with FP in a multivariable analysis. In the evaluation of lifestyle, the individuals with FP had a higher rate of depressive mood and were more restricted in their daily activities. CONCLUSIONS: Considering the significance of facial expression in psychosocial activities, public acknowledgement and further intervention are required to support patients with this distressing condition.