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Investigation of Spontaneous Abortion among Video Display Terminal Users.


PB91189209

Publication Date 1991
Personal Author Schnorr, T. M.; Grajewski, B. A.; Hornung, R. W.; Thun, M. J.; Egeland, G. M.
Page Count 38
Abstract NIOSH conducted a study of 2,430 female telephone operators to determine if exposure to electromagnetic fields emitted by video display terminals (VDT's) were associated with increased risk of spontaneous abortion. Exposure levels were determined using company records of weekly hours of VDT use and measurements of electromagnetic fields at VDT workstations. Operators who used VDT's had higher abdominal exposure to very low frequency (VLF) (15 kHz) electromagnetic. Workstations without VDT's did not emit VLF energy. Abdominal exposure to extremely low frequency (ELF) (45 to 60Hz) was similar for operators who used VDT's and those who did not. The authors found no excess risk of spontaneous abortion for VDT use in the first trimester of pregnancy and no dose-response relationship resulting from weekly hours of VDT use. Significant associations were found for other risk factors e.g. cigarette smoking, thyroid disorder, alcohol consumption. The potential association of spontaneous abortion and physical or psychological stress could not be addressed in the study design. The authors conclude that VDT use and exposure to the accompanying electromagnetic fields were not associated with an increased risk of spontaneous abortion in the study.
Keywords
  • Missed abortion
  • Occupational safety and health
  • Electromagnetic fields
  • Reproductive disorders
  • First pregnancy trimester
  • Smoking
  • Alcohol drinking
  • Risk factors
  • Thyroid diseases
  • Statistical analysis
  • Occupational exposure
  • Females
  • Radiation hazards
  • Video display terminals(VDT)
  • Spontaneous abortion
  • Miscarriage
Source Agency
  • National Institute for Occupational Safety and Health
NTIS Subject Category
  • 44G - Environmental & Occupational Factors
  • 94D - Job Environment
  • 41I - Job Environment
  • 57V - Radiobiology
  • 57S - Physiology
Corporate Authors National Inst. for Occupational Safety and Health, Cincinnati, OH.; American Cancer Society, Inc., Atlanta, GA.
Supplemental Notes Prepared in cooperation with American Cancer Society, Inc., Atlanta, GA.
Document Type Technical Report
Title Note Final rept.
NTIS Issue Number 199116
Investigation of Spontaneous Abortion among Video Display Terminal Users.
Investigation of Spontaneous Abortion among Video Display Terminal Users.
PB91189209

  • Missed abortion
  • Occupational safety and health
  • Electromagnetic fields
  • Reproductive disorders
  • First pregnancy trimester
  • Smoking
  • Alcohol drinking
  • Risk factors
  • Thyroid diseases
  • Statistical analysis
  • Occupational exposure
  • Females
  • Radiation hazards
  • Video display terminals(VDT)
  • Spontaneous abortion
  • Miscarriage
  • National Institute for Occupational Safety and Health
  • 44G - Environmental & Occupational Factors
  • 94D - Job Environment
  • 41I - Job Environment
  • 57V - Radiobiology
  • 57S - Physiology
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