Bruxism and quality of life in schoolchildren aged 11 to 14.

The purpose of this study is to assess quality of life in relation to oral health in schoolchildren with sleep bruxism. It is a transversal observational study of 594 schoolchildren (aged 11-14) of the municipality of Teresina, in the Brazilian State of Piauí. Quality of life was assessed through the Brazilian version of the CPQ11-14 questionnaire, in the short form (ISF:16).The presence of sleep bruxism was assessed from reports by the people legally responsible for the children. The results were analyzed by: calculation of an Odds Ratio (OR) estimate of chances; descriptive analysis; a Pearson Chi-squared test; a Likelihood Ratio test; and multiple logistic regression. A statistically significant association was found between sleep bruxism and the total score on the CPQ11-14 (p < 0.001), and with the scores in two domains: functional limitation (p = 0.033);and social wellbeing (p= 0.020).No association was found between quality of life and the variables gender or age. The final regression model showed that the presence of sleep bruxism increases the chance of having a greater effect on quality of life (ORadj=1.82 (1.54 - 2.10), IC = 95%).It is concluded that sleep bruxism had a negative impact on the quality of life of the schoolchildren, principally in the two domains functional limitations and changes in social wellbeing.