|Title:||RESIDENTIAL EXPOSURE TO POWER FREQUENCY MAGNETIC FIELD AND SLEEP DISORDERS AMONG WOMEN IN AN URBAN COMMUNITY OF NORTHERN TAIWAN||Authors:||CHEN, PAU-CHUNG||Keywords:||magnetic field;sleep initiation and maintenance disorders;cross-sectional study;residential exposures;depression;INSOMNIA||Issue Date:||2002||Journal Volume:||v.25||Journal Issue:||n.4||Start page/Pages:||428-432||Source:||SLEEP||Abstract:||
Study objectives: To investigate relationships between residential exposure to power frequency magnetic field and sleep initiation and maintenance disorders (SIAMD).Design: A cross-sectional design conducted in an urban town of northern Taiwan in 1995-1996.Setting/Patients: A total of 5, 078 married women aged 20-59.Interventions: N/A Measurements: The residential magnetic field intensity was assessed using EMDEX II dosimeters. Trained interviewees collected self-reported information on SIAMD and other covariates. Three type-specific SIAMD were analyzed for associations with background, bedroom, and overall residential exposures. Results: The prevalence rates of difficulty initiating sleep (DIS), difficulty maintaining sleep (DMS), and early morning awakening (EMA) were 29.5%, 38.17%, and 26.02%, respectively. The DIS prevalence was significantly associated with bedroom magnetic field exposure of circle divide 2 milli-Gauss (mG) (odds ratio (OR )=1.20, 95% confidence interval (Cl)=1.021.40). The DMS prevalence was significantly higher for women with background exposure of circle divide 2 mG (OR=1.28, 95% CI=1 .04-1.56). An elevated EMA prevalence was also significantly associated with all of the three exposure measures with excess risks ranging from 28% for overall exposure to 65% for background exposure. When magnetic field strength was analyzed as a continuous variable, background exposure, but not overall or bedroom exposure, showed a small but significant association with DMS and EMA (OR=1,05 per 1 mG increase, 95% CI=1.02-1.09). Conclusions: There is a modest association between residential exposures to elevated magnetic field intensity and insomnia complaints in women.
|Appears in Collections:||環境與職業健康科學研究所|
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