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Effect of a nighttime magnetic field exposure on sleep patterns in young women.

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Titre :	Effect of a nighttime magnetic field exposure on sleep patterns in young women. (2004)
Auteurs :	Shelley-S TWOROGER ; Scott DAVIS ; Scott-S EMERSON ; Martha-J LENTZ ; Anne MCTIERNAN ; Dana-K MIRICK
Type de document :	Article
Dans :	American journal of epidemiology (vol. 160, n° 3, 2004)
Pagination :	224-229
Langues:	Anglais
Mots-clés :	Exposition ; Sommeil ; Femme ; Homme ; Magnétisme ; Epidémiologie
Résumé :	[BDSP. Notice produite par INIST-CNRS R0xvW9uu. Diffusion soumise à autorisation]. Since poor sleep quality is associated with multiple health problems, it is important to understand factors that may affect sleep patterns. The purpose of this study was to determine the effect of a continuous, 60-Hz, nighttime magnetic field exposure on sleep outcomes in young women sleeping at home. The study was a randomized crossover trial, comparing intervention (0.5-1.0 muT above ambient levels) with ambient magnetic field levels, during two 5-night measurement periods. Subjects lived in the Seattle, Washington, area and were 20-40 years of age, had regular menstrual cycles, were not taking oral contraceptives, and had not breastfed or been pregnant during the previous year. The study was conducted between March and September of 2001. Sleep outcomes were measured via actigraphy. The range of magnetic field exposure was 0.001-0.50 muT during the ambient period and 0.41-1.21 muT during the intervention period. Sleep outcomes were not significantly different between the intervention and the ambient measurement periods. The intervention magnetic field had no effect on sleep patterns, suggesting that this exposure may not be an important factor in predicting sleep of young women who sleep at home.