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Author  |
Peixoto, C.A.T.; da Silva, A.G.T.; Carskadon, M.A.; Louzada, F.M. |
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Title |
Adolescents living in homes without electric lighting have earlier sleep times |
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Journal Article |
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Year |
2009 |
Publication |
Behavioral Sleep Medicine |
Abbreviated Journal |
Behav Sleep Med |
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Volume |
7 |
Issue |
2 |
Pages |
73-80 |
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Keywords |
Human Health; Sleep |
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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. |
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Address |
Department of Physiology, Universidade Federal do Parana, Brazil. pedatardelli@yahoo.com.br |
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Language |
English |
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Edition |
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ISSN |
1540-2002 |
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Notes |
PMID:19330580 |
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no |
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Call Number |
LoNNe @ kyba @ |
Serial |
1481 |
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