title: Comparison of the oral health problems and behavior of male daytime-only and night-shift office workers: An Internet survey.
abstract: OBJECTIVE
  The aim of this study was to compare the oral health problems and behavior of full-time male daytime-only and night shift office workers.
  
  
  METHODS
  The participants were recruited by applying screening procedures to a pool of Japanese registrants in an online database. During the period of 20 February 2015 to 11 March 2015, participants were asked to complete a questionnaire about their oral health. A total of 325 daytime-only workers and 351 workers who sometimes worked night shifts, ages 30 to 69, were analyzed in this study.
  
  
  RESULTS
  Overall, the mean number of teeth of the night shift workers was lower than that of the daytime-only workers (p=0.002). When analyzed by age group, a significant difference was seen in the 50-69 age group (p=0.016). The percentage of night shift workers with decayed teeth was higher than that of the daytime-only workers (p<0.001). The night shift workers were more likely to report gingival bleeding (p=0.015) and stomatitis (p=0.025) than the daytime-only workers. The percentage of night shift workers reporting frequent brushing behavior was lower than that of the daytime-only workers (p=0.040). The independent variables found to correlate significantly with tooth decay were night shift work (OR, 1.79; 95% CI, 1.20-2.67), current smoking habit (OR, 1.66; 95% CI, 1.13-2.46), and BMI of ≥25 (OR, 1.56; 95% CI, 1.02-2.39).
  
  
  CONCLUSIONS
  These results indicate a relationship between night shift work and oral health problems. Night shift workers may require additional support for oral health maintenance.
authors.affiliation: Department of Epidemiology and Public Health, Tokyo Dental College.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Ishizuka
authors.forename: Koichi
authors.initials: K
authors.lastname: Yoshino
authors.forename: Atsushi
authors.initials: A
authors.lastname: Takayanagi
authors.forename: Naoki
authors.initials: N
authors.lastname: Sugihara
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Maki
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Kamijyo
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D006306:Health Surveys / Q000379:methods; D006801:Humans; D020407:Internet; D008297:Male; D008875:Middle Aged; D009059:Mouth Diseases / Q000453:epidemiology* / Q000209:etiology; D009784:Occupational Diseases / Q000453:epidemiology* / Q000209:etiology; D009909:Oral Health / Q000706:statistics & numerical data*; D010561:Personnel Staffing and Scheduling; D012307:Risk Factors; D013997:Time Factors; D014076:Tooth Diseases / Q000453:epidemiology* / Q000209:etiology; D014940:Work Schedule Tolerance