Dados do Trabalho

Título

IS SLEEP BRUXISM ASSOCIATED WITH LARYNGOPHARYNGEAL REFLUX IN THE GENERAL POPULATION?

Introdução

Background: Sleep Bruxism (SB) is prevalent and usually associated with comorbidities. One of the potential conditions associated with SB is Gastroesophageal Reflux Disease (GERD) and atypical manifestations, such as Laryngopharyngeal Reflux (LPR).

Objetivo

Objective: This study aims to evaluate the association between SB and LPR symptoms in the general population of São Paulo, Brazil.

Métodos

Methods: The 2015 edition of EPISONO study sample was evaluated in this study (n=688 who completed information on SB and LPR). SB were diagnosed by self-report and by polysomnography (PSG). We report 3 groups of SB: self-report, PSG, and self-report confirmed by PSG. The occurrence of LPR symptoms was assessed using the Reflux Symptom Index (RSI) questionnaire. Poisson regression models with robust variance adjusted were used to assess the association between LPR and other sample characteristics with the prevalence of SB according to each of the 3 SB groups.

Resultados

Results: The 3 groups frequency of SB were: self-report 17.1%, PSG 7% and self-report + PSG 6.9%. The unadjusted association between sample characteristics and SB prevalence assessed by self-report (n=688) showed that individuals who presented LPR had a 51% higher prevalence of SB than their counterparts. Considering the adjusted analysis, LPR was not significantly associated with self-reported SB. An association was found between self-reported SB with: age, socio-economical status, moderate or severe insomnia and sleepiness. Regarding SB diagnosed by PSG we reported age, anxiety, sleep quality, and insomnia as significantly associated variables in the unadjusted analysis, while LPR was not. In the fully adjusted analysis, only insomnia remained significant. Finally, significant relationships of self-report + PSG SB with age, anxiety score, sleep quality, and insomnia were obtained in the unadjusted analysis. After adjustment, only moderate to severe insomnia remained significant.

Conclusões

Conclusions: Contrary to our initial hypothesis, we did not find association between any type of SB with LPR. However, moderate to severe insomnia were main predictors of SB in the general population.

Palavras -chave

Keywords: Bruxism, Sleep; Reflux, Laryngopharyngeal; Gastro-esophageal Reflux Disease.

Funding: Associação Fundo de Incentivo à Pesquisa (AFIP), São Paulo, Brazil. MLA, ST and DLRP are recipients of Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) fellowship.