Biological effects of static magnetic fields

A study is reported involving 792 individuals from scientists and technicians at seven national laboratories who have been occupationally exposed to magnetic fields of at least 5 G in strength for 8000 G-hr during their working careers. Studies of latent effects from acute and very high exposures involve subjects who have worked in fields greater than 400 G at facilities such as the calutrons at Berkeley and Oak Ridge during World War II. In addition, individuals involved in calibrating large magnets and individuals exposed to very high fields around bubble chambers are included in this high-field exposure population. The number of individuals with diseases from 20 categories are presented for exposed and control populations. No significant increase or decrease in prevalence of diseases was found. Quality checks on the data have been completed and will be published later