[Effects of extremely low frequency electromagnetic radiation on cardiovascular system of workers].
OBJECTIVE
To observe the exposure levels of extremely low frequency electromagnetic fields in workplaces and to analyze the effects of extremely low frequency electromagnetic radiation on cardiovascular system of occupationally exposed people.


METHODS
Intensity of electromagnetic fields in two workplaces (control and exposure groups) was detected with EFA-300 frequency electromagnetic field strength tester, and intensity of the noise was detected with AWA5610D integral sound level. The information of health physical indicators of 188 controls and 642 occupationally exposed workers was collected. Data were analyzed by SPSS17.0 statistic software.


RESULTS
The intensity of electric fields and the magnetic fields in exposure groups was significantly higher than that in control group (P < 0.05), but there was no significant difference of noise between two workplaces (P > 0.05). The results of physical examination showed that the abnormal rates of HCY, ALT, AST, GGT, ECG in the exposure group were significantly higher than those in control group (P < 0.05). There were no differences of sex, age, height, weight between two groups (P > 0.05).


CONCLUSIONS
Exposure to extremely low frequency electromagnetic radiation may have some effects on the cardiovascular system of workers.
Department of Epidemiology and Health Statistics, School of Public Health, Jilin University, Changchun 130021, China.
Long-yu
LY
Zhao
Chun-xiao
CX
Song
Duo
D
Yu
Xiao-liang
XL
Liu
Jian-qiu
JQ
Guo
Chuan
C
Wang
Yuan-wei
YW
Ding
Hong-xia
HX
Zhou
Shu-mei
SM
Ma
Xiao-dong
XD
Liu
Xin
X
Liu
D000328:Adult; D002319:Cardiovascular System / Q000528:radiation effects*; D016022:Case-Control Studies; D004574:Electromagnetic Fields / Q000009:adverse effects*; D060733:Electromagnetic Radiation; D006801:Humans; D008297:Male; D016273:Occupational Exposure / Q000009:adverse effects*; D055815:Young Adult