title: Effects of a 12-hour shift on mood states and sleepiness of Neonatal Intensive Care Unit nurses.
abstract: OBJECTIVE
  To assess the effect of a 12-hour shift on mood states and sleepiness at the beginning and end of the shift.
  
  
  METHODS
  Quantitative, cross-sectional and descriptive study.It was conducted with 70 neonatal intensive care unit nurses. The Brunel Mood Scale (BRUMS), Karolinska Sleepiness Scale (KSS), and a socio-demographic profile questionnaire were administered.
  
  
  RESULTS
  When the KSS and BRUMS scores were compared at the beginning of the shift associations were found with previous sleep quality (p ≤ 0.01), and quality of life (p ≤ 0.05). Statistical significant effects on BRUMS scores were also associated with previous sleep quality, quality of life, liquid ingestion, healthy diet, marital status, and shift work stress. When the beginning and end of the shift were compared, different KSS scores were seen in the group of all nurses and in the night shift one. Significant vigor and fatigue scores were observed within shift groups.
  
  
  CONCLUSIONS
  A good night's sleep has positive effects on the individual`s mood states both at the beginning and the end of the shift. The self-perception of a good quality of life also positively influenced KSS and BRUMS scores at the beginning and end of the shift. Proper liquid ingestion led to better KSS and BRUMS scores.
  
  
  OBJECTIVE
  Evaluar el efecto de un turno de 12 horas en estados de ánimo y somnolencia al principio y al final del turno.
  Estudio cuantitativo, transversal y descriptivo.Se realizó con 70 enfermeras de unidades de cuidados intensivos neonatales. Se administró la Escala de Humor Brunel (BRUMS), la Escala de Somnolencia de Karolinska (KSS) y un cuestionario de perfil sociodemográfico.
  
  
  RESULTS
  Cuando se compararon las puntuaciones de KSS y BRUMS al comienzo del turno se encontraron asociaciones con calidad de sueño previa (p ≤ 0,01) y calidad de vida (p ≤ 0,05). Los efectos estadísticos significativos en las puntuaciones de BRUMS también se asociaron con la calidad previa del sueño, la calidad de vida, la ingestión de líquidos, la dieta saludable, el estado civil y el estrés laboral por turnos. Cuando se compararon el comienzo y el final del turno, se observaron diferentes puntuaciones de KSS en el grupo de todos los enfermeros y en el turno de noche. Se observaron puntuaciones significativas de vigor y fatiga dentro de los grupos de turnos.
  Dormir bien de noche tiene efectos positivos en los estados de ánimo del individuo tanto al principio como al final del turno. La autopercepción de una buena calidad de vida también influyó positivamente en las puntuaciones KSS y BRUMS al inicio y al final del turno. La ingesta de líquidos adecuada condujo a mejores puntuaciones KSS y BRUMS.
authors.affiliation: Hospital Alberto Cavalcanti, Belo Horizonte, MG, Brazil.
authors.forename: Tadeu Sartini
authors.initials: TS
authors.lastname: Ferreira
authors.affiliation: Hospital Mater Dei, Belo Horizonte, MG, Brazil.
authors.forename: Clarice Zinato
authors.initials: CZ
authors.lastname: Moreira
authors.affiliation: Cornell University, Ithaca, NY, United States of America.
authors.forename: James
authors.initials: J
authors.lastname: Guo
authors.affiliation: Universidade Federal de Minas Gerais, Laboratório de Psicologia do Esporte, Belo Horizonte, MG, Brazil.
authors.forename: Franco
authors.initials: F
authors.lastname: Noce
mesh_terms: D000328:Adult; D000339:Affect; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007363:Intensive Care Units, Neonatal; D008297:Male; D017283:Neonatal Nursing; D016272:Occupational Health; D000073577:Shift Work Schedule; D000077260:Sleepiness