title: Determinants of sleepiness at work among railway control workers.
abstract: In the last two decades the control of the Portuguese railway network has become much more centralized in three centres, there integrating the functions of route flow management, electrical control and signalling. This study aimed to investigate the influence of work and individual determinants in sleepiness among railway control workers, namely socio-demographic factors, work ability, psychosocial factors, shiftwork characteristics, fatigue perception, and sleep. Sleepiness by shift was associated with quality of sleep, job satisfaction, fatigue perception, quantitative demands, and age. The results indicate a high prevalence of sleepiness during the night shift and show the relevance of the quality of sleep as a predictor in the three models of sleepiness for morning, afternoon and night shifts. This study, done at the major Portuguese railway control centre, alerted managers to the importance of schedule planning as well as sleepiness prevention plans and makes these results a reference for future research.
authors.affiliation: Ergonomics Laboratory, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, 1499-002, Cruz-Quebrada, Portugal; Centre for Architecture, Urban Planning and Design (CIAUD), Universidade de Lisboa, Rua Sá Nogueira, Pólo Universitário do Alto da Ajuda, 1349-055, Portugal. Electronic address: tcotrim@fmh.ulisboa.pt.
authors.forename: Teresa
authors.initials: T
authors.lastname: Cotrim
authors.affiliation: Ergonomics Laboratory, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, 1499-002, Cruz-Quebrada, Portugal; Centre for Architecture, Urban Planning and Design (CIAUD), Universidade de Lisboa, Rua Sá Nogueira, Pólo Universitário do Alto da Ajuda, 1349-055, Portugal.
authors.forename: José
authors.initials: J
authors.lastname: Carvalhais
authors.affiliation: Ergonomics Laboratory, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, 1499-002, Cruz-Quebrada, Portugal.
authors.forename: Catarina
authors.initials: C
authors.lastname: Neto
authors.affiliation: CIPER and Mathematics Unit, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, 1499-002, Cruz-Quebrada, Portugal.
authors.forename: Júlia
authors.initials: J
authors.lastname: Teles
authors.affiliation: Ergonomics Laboratory, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, 1499-002, Cruz-Quebrada, Portugal; Centre for Architecture, Urban Planning and Design (CIAUD), Universidade de Lisboa, Rua Sá Nogueira, Pólo Universitário do Alto da Ajuda, 1349-055, Portugal.
authors.forename: Paulo
authors.initials: P
authors.lastname: Noriega
authors.affiliation: Ergonomics Laboratory, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, 1499-002, Cruz-Quebrada, Portugal; Centre for Architecture, Urban Planning and Design (CIAUD), Universidade de Lisboa, Rua Sá Nogueira, Pólo Universitário do Alto da Ajuda, 1349-055, Portugal.
authors.forename: Francisco
authors.initials: F
authors.lastname: Rebelo
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D006970:Disorders of Excessive Somnolence / Q000453:epidemiology* / Q000209:etiology; D005221:Fatigue / Q000523:psychology; D006801:Humans; D007588:Job Satisfaction; D008297:Male; D008875:Middle Aged; D010561:Personnel Staffing and Scheduling; D011174:Portugal / Q000453:epidemiology; D015995:Prevalence; D011890:Railroads; D012307:Risk Factors; D012890:Sleep; D014938:Work Capacity Evaluation; D014940:Work Schedule Tolerance
keywords: Railway control; Shiftwork; Sleepiness