Risk of birth defects by parental occupational exposure to 50 Hz electromagnetic fields: a population based study

摘要: Objectives: To study the risk of birth defects by parental occupational exposure to 50 Hz electromagnetic fields. Methods: The Medical Birth Registry Norway was linked with census data on occupation. An expert panel constructed a job matrix magnetic Exposure fields estimated combining branch and occupation into one three levels: 24 hours/week above approximately 0.1 µT. Risks categories were compared across levels. Out all 1.6 million births in period 1967–95, 836 475 1 290 298 had information maternal paternal exposure, respectively. Analyses based tests for trend adjusted parents' educational level, place birth, age, year birth. Results: total not associated exposure. Maternal increased risks spina bifida (p=0.04) clubfoot (p=0.04). A negative association found isolated cleft palate (p=0.01). Paternal anencephaly (p=0.01) category "other defects" (p=0.02). Conclusion: present gives an indication between selected disorders central nervous system Given crude assessment, lack comparable studies, high number outcomes considered, results should be interpreted caution.