title: Screen viewing, body mass index, cigarette smoking and sleep duration in Belgrade University student population: results of an observational, cross-sectional study.
abstract: BACKGROUND
  Subjects that spend more time working on computers or watching television could have a higher body mass index.
  
  
  OBJECTIVE
  To assess the relationship between time spent in front of a screen and studying, body mass index (BMI), smoking, and sleep duration among university students.
  
  
  METHODS
  A cross-sectional study of 734 randomly selected students aged 21 ± 2 years (450 females) that responded an anonymous, structured questionnaire about time spent watching television or in front of a computer, time spent studying, number of daily hours of sleep, smoking habits and number of daily meals. Body mass index was also calculated for all subjects
  
  
  RESULTS
  Among males, the number of daily sleep hours, time spent working with computers and number of daily meals were significantly higher and time spent studying was significantly lower than females. Nonsmokers ate a significantly higher number of meals and spent less time watching television. No association was observed between time spent in front of a screen and number of sleep hours of body mass index.
  
  
  CONCLUSIONS
  Men and smokers spend more time working in computers. There is no association between body mass index and time spent in front of screens.
authors: University of Belgrade, School of Medicine, Institute of Medical Physiology, Belgrade, Serbia. igorpantic@gmail.com
authors: Igor
authors: I
authors: Pantic
authors: Milica
authors: M
authors: Malbasa
authors: Sinisa
authors: S
authors: Ristic
authors: Drenka
authors: D
authors: Turjacanin
authors: Snezana
authors: S
authors: Medenica
authors: Jovana
authors: J
authors: Paunovic
authors: Senka
authors: S
authors: Pantic
mesh_terms: D015992:Body Mass Index; D003201:Computers / Q000706:statistics & numerical data; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D057185:Sedentary Behavior; D055771:Serbia / Q000453:epidemiology; D012890:Sleep / Q000502:physiology*; D012907:Smoking / Q000453:epidemiology*; D013334:Students / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires; D013690:Television / Q000706:statistics & numerical data; D013997:Time Factors; D014495:Universities; D055815:Young Adult