Work with video display terminals and the risk of low-birth-weight and preterm birth.
Grajewski-B; Schnorr-TM; Reefhuis-J; Salvan-A; Roeleveld-N; Mueller-CA; Murray-WE; Conover-DL
Am J Epidemiol 1995 Jun; 141(11)(Suppl):S73
Adverse reproductive outcomes including low birthweight (LBW) and preterm birth (PB) have been inconsistently associated with video display terminal (VDT) use in several studies. To determine whether electromagnetic fields emitted by VDTs are associated with an increased risk of LBW and PB, a cohort of female telephone operators who used VDTs at work was compared to a cohort of operators who did not use VDTs. To obtain reliable estimates of exposure, weekly hours of VDT use were determined from company records. Electromagnetic fields were measured at VDT workstations and, for comparison, at workstations without VDTs. Out of 2,430 women interviewed, there were 713 eligible singleton live births. For LBW (defined as 2800 grams), no excess risk was found to be associated with any VDT use during pregnancy (odds ratio (OR) = 0.9, 95% confidence interval (CI) = 0.5-1.7). Other previously reported risk factors for LBW (gestational age of 37 weeks or less, cigarette smoking, non-white race, first pregnancy, previous LBW infant, and an interpregnancy interval of less than 18 months) were confirmed in this study. Similarly, for PB (37 weeks gestation), no excess risk was found to be associated with VDT use (OR = 0.7,95% CI=0.4-1.1). The previously reported risk factors preeclampsia/toxemia, previous PB and diabetes were confirmed. The authors conclude that VDT use and exposure to the accompanying electromagnetic fields were not associated with an increased risk of low birthweight and preterm birth in this study.
Biological-effects; Biological-monitoring; Biological-systems; Electromagnetic-fields; Epidemiology; Exposure-assessment; Exposure-levels; Exposure-methods; Occupational-exposure; Occupational-health; Pregnancy; Prenatal-exposure; Risk-analysis; Smoking; Statistical-analysis; Video-display-terminals; Women; Work-analysis; Work-environment; Worker-health; Work-operations; Workplace-studies; Work-practices
National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, DSHEFS, 4676 Columbia Parkway, Cincinnati, OH 45226
American Journal of Epidemiology. Abstracts of the 28th Annual Meeting of the Society for Epidemiologic Research, Snowbird, Utah, June 21-24, 1995