Exposure to Magnetic Field Non-Ionizing Radiation and the Risk of Miscarriage: ...

zondag, 17 december 2017 - Categorie: Onderzoeken

Bron 1: www.nature.com/articles/s41598-017-16623-8

13 dec. 2017

Exposure to Magnetic Field Non-Ionizing Radiation and the Risk of Miscarriage: A Prospective Cohort Study

Scientific Reports 7, Article number: 17541 (2017)

De-Kun Li, Hong Chen, Jeannette R. Ferber, Roxana Odouli & Charles Quesenberry
Division of Research, Kaiser Foundation Research Institute, Kaiser Permanente, Oakland, CA, USA

Magnetic field (MF) non-ionizing radiation is widespread and everyone is exposed to some degree.
This prospective cohort study of 913 pregnant women examined the association between high
MF exposure and miscarriage risk. Cox (proportional hazards) regression was used to examine the
association. After controlling for multiple other factors, women who were exposed to higher MF
levels had 2.72 times the risk of miscarriage (hazard ratio = 2.72, 95% CI: 1.42–5.19) than those with
lower MF exposure. The increased risk of miscarriage associated with high MF was consistently observed
regardless of the sources of high MF. The association was much stronger if MF was measured on a typical
day of participants’ pregnancies. The finding also demonstrated that accurate measurement of MF
exposure is vital for examining MF health effects. This study provides fresh evidence, directly from
a human population, that MF non-ionizing radiation could have adverse biological impacts on
human health.

Voor het volledige artikel zie de link bovenaan. Voor het persbericht zie:
Bron 2: www.sciencedaily.com/releases/2017/12/171213095534.htm

13 dec. 2017

Health risks linked to electromagnetic field exposure


A study of real-world exposure to non-ionizing radiation from magnetic fields in pregnant women found a
significantly higher rate of miscarriage, providing new evidence regarding their potential health risks.

A study of real-world exposure to non-ionizing radiation from magnetic fields in pregnant women found a
significantly higher rate of miscarriage, providing new evidence regarding their potential health risks. The
Kaiser Permanente study was published today in the journal Scientific Reports (Nature Publishing Group).

Non-ionizing radiation from magnetic fields is produced when electric devices are in use and electricity is
flowing. It can be generated by a number of environmental sources, including electric appliances, power
lines and transformers, wireless devices and wireless networks. Humans are exposed to magnetic fields
via close proximity to these sources while they are in use.

While the health hazards from ionizing radiation are well-established and include radiation sickness,
cancer and genetic damage, the evidence of health risks to humans from non-ionizing radiation remains
limited, said De-Kun Li, MD, PhD, principal investigator of the study and a reproductive and perinatal
epidemiologist at the Kaiser Permanente Division of Research in Oakland, California.

''Few studies have been able to accurately measure exposure to magnetic field non-ionizing radiation,''
Dr. Li said. ''In addition, due to the current lack of research on this subject, we don't know the biological
threshold beyond which problems may develop, and we also don't yet understand the possible
mechanisms for increased risks.''

In a new study funded by the National Institute of Environmental Health Sciences, researchers
asked women over age 18 with confirmed pregnancies to wear a small (a bit larger than a deck of cards)
magnetic-field monitoring device for 24 hours. Participants also kept a diary of their activities on that day,
and were interviewed in person to better control for possible confounding factors, as well as how
typical their activities were on the monitoring day. Researchers controlled for multiple variables known
to influence the risk of miscarriage, including nausea/vomiting, past history of miscarriage, alcohol use,
caffeine intake, and maternal fever and infections.

Objective magnetic field measurements and pregnancy outcomes were obtained for 913 pregnant
women, all members of Kaiser Permanente Northern California. Miscarriage occurred in 10.4 percent
of the women with the lowest measured exposure level (1st quartile) of magnetic field non-ionizing
radiation on a typical day, and in 24.2 percent of the women with the higher measured exposure level
(2nd, 3rd and 4th quartiles), a nearly three times higher relative risk. The rate of miscarriage reported in
the general population is between 10 and 15 percent, Dr. Li said.

''This study provides evidence from a human population that magnetic field non-ionizing radiation could
have adverse biological impacts on human health,'' he said.

Strengths of this study, Dr. Li noted, included that researchers used an objective measuring device
and studied a short-term outcome (miscarriage) rather than one that will occur years or decades later,
such as cancer or autoimmune diseases. The study's main limitation is that it was not feasible for
researchers to ask participants to carry the measuring device throughout pregnancy.

Dr. Li noted that the potential health risk of magnetic-field non-ionizing radiation needs more
research. ''We hope that the finding from this study will stimulate much-needed additional studies into
the potential environmental hazards to human health, including the health of pregnant women.''

De titel van deze publicatie begint met: 'Exposure to Magnetic Field Non-Ionizing Radiation'. Nu zijn
er 'Magnetic Fields': laagfrequent (LF) velden en radio-frequent (RF) velden in het nabije veld bij antennes,
en 'Electric Fields': eveneens LF en RF in het nabije veld bij antennes, en is er ook 'Non-Ionizing Radiation',
zoals van de zon in het zichtbare gebied, in het infrarood en met langere golflengtes en verder ook in
het verre veld van antennes. De combinatie Magnetic Field Non-Ionizing Radiation', zoals in de titel
en in het artikel, bestaat echter niet. Je kunt proefpersonen moeilijk blootstellen aan iets wat niet bestaat.
Lezen van de publicatie levert op dat het om LF magneetvelden gaat en niet over straling. In het artikel
wordt geen kwantitatieve informatie gegeven over de sterkte van de gemeten magneetvelden evenmin
staat erin in welk frequentiegebied gemeten is, essentiële informatie maar kennelijk te technisch voor
de auteurs. Er staat ook niets in het artikel over mogelijk complicerende factoren, zoals laag-frequente
elektrische velden, netvervuiling en de mogelijke effecten van de straling veroorzaakt door WiFi, DECT
telefoons, zendmasten, e.d.. Alles bij elkaar een artikel wat we maar snel moeten vergeten.

Zie ook het meer positieve commentaar in:

https://www.hugoschooneveld.nl/pdf_bestanden/pdf_blogs/kans_op_miskraam_verdrievoudigd_door_blootstelling_aan_laagfrequente_elektromagnetische_velden.pdf .

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