title: Serum brain-derived neurotrophic factor levels are associated with dyssomnia in females, but not males, among Japanese workers.
abstract: OBJECTIVE
  Brain-derived neurotrophic factor (BDNF) is a member of the neurotrophin family of growth factors that promote the growth and survival of neurons. Recent evidence suggests that BDNF is a sleep regulatory substance that contributes to sleep behavior. However, no studies have examined the association between the serum BDNF levels and dyssomnia. The present study was conducted to clarify the association between the serum BDNF levels and dyssomnia.
  
  
  METHODS
  A total of 344 workers (age: 40.1 ± 10.5 years, male: 204, female: 140) were included in the study. The serum BDNF levels were categorized into tertiles according to sex.
  
  
  RESULTS
  The prevalence of dyssomnia was 35.1% in males and 30.0% in females. In the females, the BDNF levels were found to be negatively associated with dyssomnia after adjusting for age, body mass index, hypertension, dyslipidemia, hyperglycemia, depression, smoking, alcohol intake, and regular exercise. Compared with the females in the high BDNF group, the multivariate odds ratio (95% CI) of dyssomnia was 2.08 (0.62-6.98) in females in the moderate BDNF group and 8.41 (2.05-27.14) in females in the low BDNF group. No such relationships were found in the males.
  
  
  CONCLUSIONS
  The serum BDNF levels are associated with dyssomnia in Japanese female, but not male, workers.
authors.affiliation: Department of Community Health Nursing, Shimane University Faculty of Medicine, Izumo, Shimane, 693-8501, Japan. rei130@lime.ocn.ne.jp
authors.forename: Reiko
authors.initials: R
authors.lastname: Nishichi
authors.forename: Yu
authors.initials: Y
authors.lastname: Nufuji
authors.forename: Masakazu
authors.initials: M
authors.lastname: Washio
authors.forename: Shuzo
authors.initials: S
authors.lastname: Kumagai
mesh_terms: D000328:Adult; D019208:Brain-Derived Neurotrophic Factor / Q000097:blood*; D020920:Dyssomnias / Q000097:blood*; D004651:Employment; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D016017:Odds Ratio; D012737:Sex Factors
chemical_list: D019208:Brain-Derived Neurotrophic Factor
keywords: Japanese worker; Serum brain-derived neurotrophic factor; dyssomnia; sex