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Video display terminals and the risk of spontaneous abortion.

Authors
Schnorr-TM; Grajewski-BA; Hornung-RW; Thun-MJ; Egeland-GM; Murray-WE; Conover-DL; Halperin-WE
Source
N Engl J Med 1991 Mar; 324(11):727-733
NIOSHTIC No.
00199459
Abstract
The relationship between spontaneous abortion and the use of video display terminals (VDTs) was assessed. A cohort of female telephone operators who used VDTs at work was compared with a cohort of operators who did not use VDTs to determine whether the electromagnetic fields emitted by VDTs were associated with an increased risk of spontaneous abortion. The number of hours of VDT use per week was determined from company records. Electromagnetic fields were measured at the worksite. While operators who used VDTs had higher abdominal exposure to very low frequency electromagnetic fields, abdominal exposure to extremely low frequency fields was similar for operators who used VDTs and those who did not. Among the 2430 women who were interviewed, there were 882 pregnancies that met the criteria for inclusion in the study. No excess risk of spontaneous abortion was observed among women who used VDTs during the first trimester of pregnancy and no dose response relation was apparent on examination of the women's hours of VDT use per week. There continued to be no detectable risk associated with the use of VDTs when multiple pregnancies, early abortion, late abortion, and all fetal losses were assessed independently. The authors conclude that the use of VDTs and exposure to the accompanying electromagnetic fields under the described conditions are not associated with an increased risk of spontaneous abortion.
Keywords
Reproductive-effects; Reproductive-hazards; Worker-health; Occupational-hazards; Video-display-terminals; Risk-analysis; Occupational-exposure; Workplace-studies; Electromagnetic-fields
CODEN
NEJMAG
Publication Date
19910314
Document Type
Journal Article
Fiscal Year
1991
NTIS Accession No.
NTIS Price
Issue of Publication
11
ISSN
0028-4793
Source Name
New England Journal of Medicine
State
OH
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