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Author Peixoto, C.A.T.; da Silva, A.G.T.; Carskadon, M.A.; Louzada, F.M. url  doi
openurl 
  Title (up) Adolescents living in homes without electric lighting have earlier sleep times Type Journal Article
  Year 2009 Publication Behavioral Sleep Medicine Abbreviated Journal Behav Sleep Med  
  Volume 7 Issue 2 Pages 73-80  
  Keywords Human Health; Sleep  
  Abstract The aim of this project was to compare circadian rhythmicity of a group of 37 adolescents (14 girls), aged 11 to 16 (mean age = 13.1 +/- 1.7 years), with and without electricity at home. Twenty students attended morning school (07:30-11:30), and 17 attended evening school classes (19:00-22:30). Eleven adolescents had no electric lighting at home (5 attended morning classes and 6 attended evening classes). They completed a sleep log and wore a wrist actigraph for 5 consecutive days. Saliva samples were collected to assess DLMO. Data were compared by ANOVA and showed later timing and a more extended sleep period for those who attended late classes. Those adolescents without electricity at home had significantly earlier sleep onset on school days. As to DLMO, a trend to a delay was observed in the groups who had electric lighting.  
  Address Department of Physiology, Universidade Federal do Parana, Brazil. pedatardelli@yahoo.com.br  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1540-2002 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:19330580 Approved no  
  Call Number LoNNe @ kyba @ Serial 1481  
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