关键词: 夜磨牙症, 身高, 学龄期儿童

Abstract: Objective To investigate the prevalence of sleep bruxism in Chinese school-age children,and to explore the influence of sleep bruxism on the height increase in childhood.Methods Totally 21408 school-age children aged 5 to 12 years from 8 different cities in China were enrolled in this study from November to December in 2005. Children′s basic information,sleep-related condition and health condition were collected by questionnaire survey. Heights and weights were measured by the trained health-care teachers in each school. The influence of sleep bruxism on height increase was analyzed by using multivariable liner regression. Results The overall prevalence of sleep bruxism was 23.7%(5 084/21 408) in school-age children in China. Factors that could influence height include gender(β=-0.007),age(t=7.73),light in the sleep room(F=30.10),time spend on sports(F=14.58),time spent on watching TV(F=22.76) and co-sleeping with parents(t=6.62) in the univariable analysis. Multivariable liner regression indicated that having sleep bruxism would attenuate the children′s height(β=-0.127). While the sensitivity analysis showed that the influence of sleep bruxism on height increase became larger with the increase of children′s age(5-6 years old:β=-0.131,7-8 years old:β=-0.098;9-10 years old:β=-0.115;11-12 years old:β=-0.196). Conclusion In Chinese school-age children,having sleep bruxism could negatively influence the height,especially in elder children,which might provide new evidence for clinical intervention.

Key words: sleep bruxism, height, school-age children