Maternal cumulative exposure to extremely low frequency electromagnetic fields and pregnancy outcomes in the Elfe cohort.
Published in: Environ Int 2018; 112: 165-173
Aim of study (acc. to author)
Endpoint/type of risk estimation
questionnaire: present or last occupation, job status during pregnancy, start of maternity leave, parental occupation during pregnancy, maternal main job duties and tasks, the industry and the employer name and address
job exposure matrix: based on INTEROCC JEM ( Turner et al. (2014)), including 5 nonprofessional situations (housewife, student, unemployed, retired, prisoner) calculation: summation of the daily
exposure in the first 231 days of gestation (equivalent to 33 first weeks of gestation) results in the cumulative exposure in µT-days Exposure groups
Reference group 1
cumulative exposure: < 17.5 µT-days
cumulative exposure: 17.5 - 23.8 µT-days
cumulative exposure: 23.8 - 36.2 µT-days
cumulative exposure: 36.2 - 61.6 µT-days
cumulative exposure: ≥ 61.6 µT-days (90th percentile)
Reference group 6
cumulative exposure: < 44.1 µT-days
cumulative exposure: ≥ 44.1 µT-days
mothers enrolled in a prospective birth cohort (Elfe study), infants born at 33 weeks of gestation or more
2011, follow-up at the child's age of 2 months
multiple births, mothers under age 18, unable to give informed consent, or who intended to move abroad within three years
Statistical analysis method:
Conclusion (acc. to author)
Study funded by
Ministère délégué à l'Enseignement supérieur et à la Recherche (Ministry of National Education and Research), France
Agence Nationale de Sécurité Sanitaire de l'Alimentation, de l'Environnement et du Travail (ANSES; French Agency for Food, Environmental and Occupational Health & Safety), France
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