Association of health-related factors with self-reported sleep and awake bruxism in Northern Finland Birth Cohort 1966 - a cross-sectional study.

OBJECTIVE: The study aimed to investigate the association of sleep bruxism (SB) and awake bruxism (AB) with health-related factors. METHODS: Data on bruxism and diagnosed diseases, use of psychoactive substances and regular identified psychoactive drugs were collected from 1,962 subjects in the Northern Finland Birth Cohort 1966 through a questionnaire. The associations were analyzed using chi-square tests and binary regression models, adjusting for gender and education, and for anxiety/depression symptoms. RESULTS: Migraine and gastric/duodenal disorders, use of serotonergic antidepressants and a high number of psychoactive drugs associated significantly with AB and SB. Gastrointestinal diseases associated with SB. Poor general health and hand eczema associated with AB. Based on the multivariate model, depression/anxiety symptoms seemed to mediate the associations of bruxism with depression, hand eczema, self-reported gastric/duodenal disorders and the number of identified drugs. CONCLUSION: Several diseases, depression/anxiety symptoms and psychoactive medications were associated with SB and AB, the associations being stronger with AB than SB.