Study type: Medical/biological study (experimental study, observational study)

Study of human neurovegetative and hematologic effects of environmental low-frequency (50-Hz) electromagnetic fields produced by transformers med./bio.

Published in: Arch Environ Health 1998; 53 (2): 87-92

Aim of study (acc. to author)

To conduct a survey of neurovegetative and hematologic disorders in a population (n = 13) exposed occupationally to environmental electromagnetic fields.



Exposure Parameters
Exposure 1: 50 Hz
Exposure duration: 8 h/d for 1-5 yrs

Exposure 1

Main characteristics
Frequency 50 Hz
Exposure duration 8 h/d for 1-5 yrs
Exposure setup
Exposure source
Measurand Value Type Method Mass Remarks
magnetic flux density 200 nT minimum calculated - mean daily over 1 wk period
magnetic flux density 6.6 µT maximum calculated - mean daily over 1 wk period

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • before exposure
  • during exposure
  • after exposure

Main outcome of study (acc. to author)

The exposed population had a significant increase in the degree of certain neurovegetative disorders. Additionally, the population experienced a significant fall in total lymphocytes and CD4, CD3, and CD2 lymphocytes, as well as a rise in natural killer cells. Leukopenia and neutropenia were also revealed in two persons permanently exposed to doses of 1.2-6.6 µT. The disorders disappeared when exposure stopped, and they reappeared on re-exposure.

Study character:

Study funded by

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