The meters were worn on the hip in a belted pouch. During the sleep, subjects were instructed to leave the meter beside the bed, close to the body, but not near electrical and electronic devices.
59 workers, 26 men and 33 women, engaged in different occupations were included in the study: 26 in clothing production, 14 in local utility company, 6 primary school teachers, 5 in engineering industry and a further 8 in other occupations. Morning urine samples were collected twice: 1) on Friday after 4 days of occupational exposure or 2) on Monday after 2 days of no occupational exposure.
MF was measured in all subjects using a personal exposure meters EMDEX Lite. The meter measures magnetic fieldinduction in space along three orthogonal directions and calculates the values as the quadratic sum of all three directions.
Ministero del Lavoro e delle Politiche Sociali (Ministry of Labour and Social Policies), Italy
Tiwari R et al.
The Potential Bioeffects of Extremely Low Frequency Electromagnetic Fields on Melatonin Levels & Related Oxidative Stress in Electric Utility Workers Exposed to 132 kV Substation
Davis S et al.
Effects of 60-Hz magnetic field exposure on nocturnal 6-sulfatoxymelatonin, estrogens, luteinizing hormone, and follicle-stimulating hormone in healthy reproductive-age women: results of a crossover trial
Comment on: Non-ionizing radiation, Part 1: Static and extremely low-frequency electric and magnetic fields, International Agency for Research on Cancer (IARC) Monograph (Vol. 80), 2002
Touitou Y et al.
Magnetic fields and the melatonin hypothesis: a study of workers chronically exposed to 50-Hz magnetic fields
Noonan CW et al.
Relationship between amyloid beta protein and melatonin metabolite in a study of electric utility workers
Youngstedt SD et al.
No association of 6-sulfatoxymelatonin with in-bed 60-Hz magnetic field exposure or illumination level among older adults
Bakos J et al.
One week of exposure to 50 Hz, vertical magnetic field does not reduce urinary 6-sulphatoxymelatonin excretion of male wistar rats
de Bruyn L et al.
The influence of long-term exposure of mice to randomly varied power frequency magnetic fields on their nocturnal melatonin secretion patterns
Bowman JD et al.
Hazard surveillance for industrial magnetic fields: II. Field characteristics from waveform measurements
Bakos J et al.
Urinary 6-Sulphatoxymelatonin Excretion of Rats is not Changed by 24 Hours of Exposure to A Horizontal 50-Hz, 100-μT Magnetic Field
Loscher W et al.
Exposure of female rats to a 100-microT 50 Hz magnetic field does not induce consistent changes in nocturnal levels of melatonin
Bakos J et al.
Urinary 6-sulphatoxymelatonin excretion is increased in rats after 24 hours of exposure to vertical 50 Hz, 100 microT magnetic field
Truong H et al.
Effect of various acute 60 Hz magnetic field exposures on the nocturnal melatonin rise in the adult Djungarian hamster
Mevissen M et al.
Exposure of DMBA-treated female rats in a 50-Hz, 50 microTesla magnetic field: effects on mammary tumor growth, melatonin levels, and T lymphocyte activation
Selmaoui B et al.
Magnetic fields and pineal function in humans: evaluation of nocturnal acute exposure to extremely low frequency magnetic fields on serum melatonin and urinary 6-sulfatoxymelatonin circadian rhythms
Pfluger DH et al.
Effects of exposure to 16.7 Hz magnetic fields on urinary 6-hydroxymelatonin sulfate excretion of Swiss railway workers
60-Hz magnetic field exposure effects on the melatonin rhythm and photoperiod control of reproduction