title: Influence of Sleep on Quality of Life Among Hospital Nurses.
abstract: BACKGROUND
  Sleep disorders are the cause of morbidity and mortality and can decrease functional capacity and quality of life. Nurses, especially those working irregular or night shifts, are at risk for developing sleep disorders. The present study aims to determine the relationship between sleep quality and health-related quality of life (HRQOL) as well as quantitative and subjective aspects of sleep quality in nurses.
  
  
  METHODS
  This cross-sectional study was conducted on 1456 nurses working in 11 hospitals in Shiraz and Tehran (Iran) in 2014. Structured questionnaires (Pittsburg Sleep Quality Index [PSQI] and Medical Outcomes Study Short Form-36 Survey [SF-36]) were used to collect data on participants' demographic characteristics, sleep quality, and health-related quality of life. Chi-square and independent samples t-test were employed for statistical analysis.
  
  
  RESULTS
  Mean age of participants was 30.81 ± 7.8, and most of them were female (89.04%) and poor sleepers. Long-duration sleepers slept for more than 9.8 h/night, and they obtained higher scores than short-duration sleepers (<4.5 h/night) in all SF-36 domains. The study results showed that increased quality of life was significantly related to health-related quality of life.
  
  
  CONCLUSIONS
  This study showed strong evidence that sleep disorders, such as poor quality and short duration of sleep, are negatively associated with HRQOL. Therefore, developing systemic strategies to cope with the problem seems to be necessary.
authors.affiliation: Ph.D. of Occupation Health, Associate Professor, Department of Occupational Health, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran.
authors.forename: Zahra
authors.initials: Z
authors.lastname: Zamanian
authors.affiliation: Postgraduate Student of Oral and Maxillofacial Radiology, Department of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
authors.forename: Kiana
authors.initials: K
authors.lastname: Nikeghbal
authors.affiliation: Ph.D. of Occupation Health, Assistant Professor, Department of Community Medicine, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Farahnaz
authors.initials: F
authors.lastname: Khajehnasiri
keywords: personal satisfaction; quality of life; sleep disorders; sleep initiation