TY - JOUR
T1 - Associations between sleep bruxism, sleep quality, and exposure to secondhand smoke in Japanese young adults
T2 - a cross-sectional study
AU - Toyama, Naoki
AU - Ekuni, Daisuke
AU - Tabata, Ayano
AU - Yoneda, Toshiki
AU - Kataoka, Kota
AU - Yokoi, Aya
AU - Uchida, Yoko
AU - Fukuhara, Daiki
AU - Saho, Hikari
AU - Monirul, Islam Md
AU - Sawada, Nanami
AU - Nakashima, Yukiho
AU - Iwasaki, Yoshiaki
AU - Morita, Manabu
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/4
Y1 - 2020/4
N2 - Objective: Sleep bruxism, a major sleep disorder that causes serious harm to oral health, is considered a multifactorial disease. Sleep bruxism can be induced by smoking, which also adversely affects sleep quality. The objective of present study was to clarify the associations between sleep bruxism, sleep quality, and exposure to secondhand smoke (SHS). Methods: To assess the prevalence of sleep bruxism, sleep quality, and SHS exposure, we conducted oral examinations and self-report questionnaires on university students in Japan. Sleep bruxism and quality were screened using the Japanese version of the Pittsburgh Sleep Quality Index (PSQI) and the third edition of the International Classification of Sleep Disorders (ICSD-3). The inclusion criteria were adults aged between 18 and 19 years, non-smokers and non-alcohol drinkers. The exclusion criteria was failing to complete the questionnaire in full. Results: We analyzed a total of 1781 Japanese young adults. Young adult females who had been exposed to SHS had worse sleep quality (p = 0.019) than those who had not. Young adult female with worse sleep quality showed a higher prevalence of sleep bruxism (p = 0.034) than those with better sleep quality. Using structural equation modeling, direct associations were identified between SHS exposure and poor sleep quality (standardized coefficients, 0.153; p = 0.008) and between sleep bruxism and poor sleep quality (standardized coefficients, 0.187; p = 0.022) in young adult females. However, no association was found among young adult males. Conclusion: SHS exposure is indirectly associated with sleep bruxism through poor sleep quality in Japanese young adult females.
AB - Objective: Sleep bruxism, a major sleep disorder that causes serious harm to oral health, is considered a multifactorial disease. Sleep bruxism can be induced by smoking, which also adversely affects sleep quality. The objective of present study was to clarify the associations between sleep bruxism, sleep quality, and exposure to secondhand smoke (SHS). Methods: To assess the prevalence of sleep bruxism, sleep quality, and SHS exposure, we conducted oral examinations and self-report questionnaires on university students in Japan. Sleep bruxism and quality were screened using the Japanese version of the Pittsburgh Sleep Quality Index (PSQI) and the third edition of the International Classification of Sleep Disorders (ICSD-3). The inclusion criteria were adults aged between 18 and 19 years, non-smokers and non-alcohol drinkers. The exclusion criteria was failing to complete the questionnaire in full. Results: We analyzed a total of 1781 Japanese young adults. Young adult females who had been exposed to SHS had worse sleep quality (p = 0.019) than those who had not. Young adult female with worse sleep quality showed a higher prevalence of sleep bruxism (p = 0.034) than those with better sleep quality. Using structural equation modeling, direct associations were identified between SHS exposure and poor sleep quality (standardized coefficients, 0.153; p = 0.008) and between sleep bruxism and poor sleep quality (standardized coefficients, 0.187; p = 0.022) in young adult females. However, no association was found among young adult males. Conclusion: SHS exposure is indirectly associated with sleep bruxism through poor sleep quality in Japanese young adult females.
KW - Cross-sectional study
KW - Secondhand smoke
KW - Sleep bruxism
KW - Sleep quality
KW - Young adults
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U2 - 10.1016/j.sleep.2019.09.003
DO - 10.1016/j.sleep.2019.09.003
M3 - Article
C2 - 32028227
AN - SCOPUS:85078726627
VL - 68
SP - 57
EP - 62
JO - Sleep Medicine
JF - Sleep Medicine
SN - 1389-9457
ER -