RF Safe

Development of an RF-EMF Exposure Surrogate for Epidemiologic Research.

International journal of environmental research and public health · 2015 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 4776

Using HERMES adolescent data, the authors developed an integrative exposure surrogate combining near-field and far-field RF-EMF into single brain and whole-body dose measures. Mean cumulative brain and whole-body doses were 1559.7 mJ/kg/day and 339.9 mJ/kg/da…

Study snapshot

PublicationInternational journal of environmental research and public health · 2015
Study typeexposure_assessment
Reported directionUnclear
Evidence ratingInsufficient

Abstract

Exposure assessment is a crucial part in studying potential effects of RF-EMF. Using data from the HERMES study on adolescents, we developed an integrative exposure surrogate combining near-field and far-field RF-EMF exposure in a single brain and whole-body exposure measure. Contributions from far-field sources were modelled by propagation modelling and multivariable regression modelling using personal measurements. Contributions from near-field sources were assessed from both, questionnaires and mobile phone operator records. Mean cumulative brain and whole-body doses were 1559.7 mJ/kg and 339.9 mJ/kg per day, respectively. 98.4% of the brain dose originated from near-field sources, mainly from GSM mobile phone calls (93.1%) and from DECT phone calls (4.8%). Main contributors to the whole-body dose were GSM mobile phone calls (69.0%), use of computer, laptop and tablet connected to WLAN (12.2%) and data traffic on the mobile phone via WLAN (6.5%). The exposure from mobile phone base stations contributed 1.8% to the whole-body dose, while uplink exposure from other people's mobile phones contributed 3.6%. In conclusion, the proposed approach is considered useful to combine near-field and far-field exposure to an integrative exposure surrogate for exposure assessment in epidemiologic studies. However, substantial uncertainties remain about exposure contributions from various near-field and far-field sources.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeexposure_assessment
Effect directionunclear
PopulationAdolescents (HERMES study)
Sample sizeNot supplied
ExposureRF · per day
Evidence strengthInsufficientConfidence: 78% · Peer reviewed: yes

Main findings

Using HERMES adolescent data, the authors developed an integrative exposure surrogate combining near-field and far-field RF-EMF into single brain and whole-body dose measures. Mean cumulative brain and whole-body doses were 1559.7 mJ/kg/day and 339.9 mJ/kg/day, respectively; 98.4% of brain dose was attributed to near-field sources (mainly GSM calls 93.1% and DECT calls 4.8%). For whole-body dose, main contributors were GSM calls (69.0%), WLAN-connected computer/laptop/tablet use (12.2%), and mobile phone data traffic via WLAN (6.5%), while base stations contributed 1.8% and uplink from other people’s phones 3.6%; the approach was considered useful but with substantial uncertainties in source contributions.

Outcomes measured

  • Development of an integrative RF-EMF exposure surrogate (brain and whole-body dose)
  • Estimated mean cumulative brain dose (mJ/kg per day)
  • Estimated mean cumulative whole-body dose (mJ/kg per day)
  • Source-specific contributions to brain and whole-body dose (near-field vs far-field; GSM calls, DECT calls, WLAN use, base stations, uplink from others)

Limitations

  • Substantial uncertainties remain about exposure contributions from various near-field and far-field sources (as stated by authors).
  • Sample size not reported in provided abstract/metadata.
View raw extracted JSON
{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "RF",
    "source": "multiple (near-field and far-field sources including mobile phones, DECT, WLAN, base stations)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "per day"
  },
  "population": "Adolescents (HERMES study)",
  "sample_size": null,
  "outcomes": [
    "Development of an integrative RF-EMF exposure surrogate (brain and whole-body dose)",
    "Estimated mean cumulative brain dose (mJ/kg per day)",
    "Estimated mean cumulative whole-body dose (mJ/kg per day)",
    "Source-specific contributions to brain and whole-body dose (near-field vs far-field; GSM calls, DECT calls, WLAN use, base stations, uplink from others)"
  ],
  "main_findings": "Using HERMES adolescent data, the authors developed an integrative exposure surrogate combining near-field and far-field RF-EMF into single brain and whole-body dose measures. Mean cumulative brain and whole-body doses were 1559.7 mJ/kg/day and 339.9 mJ/kg/day, respectively; 98.4% of brain dose was attributed to near-field sources (mainly GSM calls 93.1% and DECT calls 4.8%). For whole-body dose, main contributors were GSM calls (69.0%), WLAN-connected computer/laptop/tablet use (12.2%), and mobile phone data traffic via WLAN (6.5%), while base stations contributed 1.8% and uplink from other people’s phones 3.6%; the approach was considered useful but with substantial uncertainties in source contributions.",
  "effect_direction": "unclear",
  "limitations": [
    "Substantial uncertainties remain about exposure contributions from various near-field and far-field sources (as stated by authors).",
    "Sample size not reported in provided abstract/metadata."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "RF-EMF",
    "exposure assessment",
    "exposure surrogate",
    "near-field",
    "far-field",
    "propagation modelling",
    "personal measurements",
    "questionnaires",
    "mobile phone operator records",
    "adolescents",
    "brain dose",
    "whole-body dose",
    "GSM",
    "DECT",
    "WLAN",
    "base stations"
  ],
  "suggested_hubs": [
    {
      "slug": "school-wi-fi",
      "weight": 0.55,
      "reason": "Includes WLAN-related exposure contributions (computer/laptop/tablet connected to WLAN; mobile phone data via WLAN) in an adolescent population."
    }
  ]
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.3390/ijerph120505634
PubMed: 26006132

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