title: Factors Related to Sleep Disorders among Male Firefighters.
abstract: OBJECTIVE
  The aim of this study was to investigate factors associated with sleep disorders in male firefighters working in a metropolitan city in South Korea.
  
  
  METHODS
  Self-administered questionnaires including the Nordic Musculoskeletal Questionnaire, Korean Occupational Stress Scale-Short Form, Psychosocial Well-Being Index-Short Form, Pittsburg Sleep Quality Index, and Beck-Depression Inventory-2 as well as surveys collecting socio-demographic characteristics and work-related factors were given to 730 male firefighters. After exclusion for missing data, 657 male firefighters were included, and logistic regression analysis adjusted for the work-related factors, psychosocial factors, and general risk factors were used to assess the relationship between sleep disorders and associated factors.
  
  
  RESULTS
  The prevalence of sleep disorders was 48.7%. Shift work (adjusted OR 1.58, 95% CI = 1.02-2.45), musculoskeletal symptoms (adjusted OR 2.89, 95% CI = 2.02-4.14), and depression (adjusted OR 7.04 95% CI = 4.03-12.30) were associated with sleep disorders.
  
  
  CONCLUSIONS
  Musculoskeletal symptoms, shift work, and depression are associated with sleep disorders. Integrated health management is needed to promote good sleep quality among firefighters.
authors.affiliation: Department of Occupational and Environmental Medicine, Dongsan Medical Center of Keimyung University, Daegu, Republic of Korea.
authors.forename: Dong-Kyun
authors.initials: DK
authors.lastname: Lim
authors.affiliation: Department of Occupational and Environmental Medicine, Dongsan Medical Center of Keimyung University, Daegu, Republic of Korea.
authors.forename: Ki-Ook
authors.initials: KO
authors.lastname: Baek
authors.affiliation: Department of Occupational and Environmental Medicine, Dongsan Medical Center of Keimyung University, Daegu, Republic of Korea ; Department of Preventive Medicine, Keimyung University School of Medicine, Daegu, Republic of Korea.
authors.forename: In-Sung
authors.initials: IS
authors.lastname: Chung
authors.affiliation: Department of Occupational and Environmental Medicine, Dongsan Medical Center of Keimyung University, Daegu, Republic of Korea ; Department of Preventive Medicine, Keimyung University School of Medicine, Daegu, Republic of Korea.
authors.forename: Mi-Young
authors.initials: MY
authors.lastname: Lee
keywords: Firefighters; Risk factors; Sleep disorders