Nocturnal excretion of a urinary melatonin metabolite among electric utility workers
Authors not listed · 1998
Temporally stable magnetic field exposures were associated with reduced nocturnal 6-OHMS excretion in humans.
Plain English Summary
Researchers studied the effects of 60-Hz magnetic field and ambient light exposures on the pineal hormone melatonin among electric utility workers. Personal exposure was measured at 15-second intervals over 3 consecutive 24-hour periods. Magnetic field intensity, intermittence, or cumulative exposure had little influence on nocturnal 6-OHMS excretion. Residential RCMS magnetic field exposures were associated with lower nocturnal 6-OHMS/cr concentrations. The greatest reductions occurred when RCMS exposures both at work and at home were combined.
Why This Matters
Exposure metrics based on magnetic field intensity, intermittence, or temporal stability were calculated for periods of work, home, and sleep. A rate-of-change metric (RCM) was used to estimate intermittence, and the standardized RCM (RCMS = RCM/standard deviation) was used to evaluate temporal stability. The effects of magnetic field exposure on total overnight 6-hydroxymelatonin sulfate (6-OHMS) excretion and creatinine-adjusted nocturnal 6-OHMS (6-OHMS/cr) concentration were analyzed with adjustment for age, month, and light exposure. In multivariate statistical analyses, the interaction term for geometric mean and RCMS magnetic field exposures at home was associated with lower nocturnal 6-OHMS/cr and overnight 6-OHMS levels. Modest reductions in the mean 6-OHMS levels occurred after RCMS exposures during work.
Exposure Information
Specific exposure levels were not quantified in this study.
Show BibTeX
@article{nocturnal_excretion_of_a_urinary_melatonin_metabolite_among_electric_utility_workers_ce1570,
author = {Unknown},
title = {Nocturnal excretion of a urinary melatonin metabolite among electric utility workers},
year = {1998},
doi = {10.5271/SJWEH.297},
}