RF Safe

Hypersensitivity to RF fields emitted from CDMA cellular phones: a provocation study.

Bioelectromagnetics · 2009 · No effect · Moderate evidence

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No effectModerate evidencePaper 4951

In a sham-controlled provocation study using CDMA cellular phone RF exposure (maximum 300 mW) for 30 minutes, RF exposure did not affect physiological parameters or subjective symptoms in either the EHS or non-EHS group. There was no evidence that the EHS gro…

Study snapshot

PublicationBioelectromagnetics · 2009
Study typerandomized_trial
Reported directionNo effect
Evidence ratingModerate

Abstract

With the number of cellular phone users rapidly increasing, there is a considerable amount of public concern regarding the effects that electromagnetic fields (EMFs) from cellular phones have on health. People with self-attributed electromagnetic hypersensitivity (EHS) complain of subjective symptoms such as headaches, insomnia, and memory loss, and attribute these symptoms to radio frequency (RF) radiation from cellular phones and/or base stations. However, EHS is difficult to diagnose because it relies on a person's subjective judgment. Various provocation studies have been conducted on EHS caused by Global System for Mobile Communications (GSM) phones in which heart rate and blood pressure or subjective symptoms were investigated. However, there have been few sham-controlled provocation studies on EHS with Code Division Multiple Access (CDMA) phones where physiological parameters, subjective symptoms, and perception of RF radiation for EHS and non-EHS groups were simultaneously investigated. In this study, two volunteer groups of 18 self-reported EHS and 19 non-EHS persons were tested for both sham and real RF exposure from CDMA cellular phones with a 300 mW maximum exposure that lasted half an hour. We investigated not only the physiological parameters such as heart rate, respiration rate, and heart rate variability (HRV), but also various subjective symptoms and the perception of EMF. In conclusion, RF exposure did not have any effects on physiological parameters or subjective symptoms in either group. As for EMF perception, there was no evidence that the EHS group better perceived EMF than the non-EHS group.

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 typerandomized_trial
Effect directionno_effect
PopulationVolunteers: 18 self-reported electromagnetic hypersensitivity (EHS) and 19 non-EHS persons
Sample size37
ExposureRF · 30 minutes (real vs sham)
Evidence strengthModerateConfidence: 78% · Peer reviewed: yes

Main findings

In a sham-controlled provocation study using CDMA cellular phone RF exposure (maximum 300 mW) for 30 minutes, RF exposure did not affect physiological parameters or subjective symptoms in either the EHS or non-EHS group. There was no evidence that the EHS group perceived EMF better than the non-EHS group.

Outcomes measured

  • Heart rate
  • Respiration rate
  • Heart rate variability (HRV)
  • Subjective symptoms (e.g., headaches, insomnia, memory loss)
  • Perception of EMF/RF exposure

Limitations

  • EHS status was self-reported and based on subjective attribution
  • Frequency and SAR were not reported in the abstract
  • Short exposure duration (30 minutes)
View raw extracted JSON
{
  "study_type": "randomized_trial",
  "exposure": {
    "band": "RF",
    "source": "mobile phone",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "30 minutes (real vs sham)"
  },
  "population": "Volunteers: 18 self-reported electromagnetic hypersensitivity (EHS) and 19 non-EHS persons",
  "sample_size": 37,
  "outcomes": [
    "Heart rate",
    "Respiration rate",
    "Heart rate variability (HRV)",
    "Subjective symptoms (e.g., headaches, insomnia, memory loss)",
    "Perception of EMF/RF exposure"
  ],
  "main_findings": "In a sham-controlled provocation study using CDMA cellular phone RF exposure (maximum 300 mW) for 30 minutes, RF exposure did not affect physiological parameters or subjective symptoms in either the EHS or non-EHS group. There was no evidence that the EHS group perceived EMF better than the non-EHS group.",
  "effect_direction": "no_effect",
  "limitations": [
    "EHS status was self-reported and based on subjective attribution",
    "Frequency and SAR were not reported in the abstract",
    "Short exposure duration (30 minutes)"
  ],
  "evidence_strength": "moderate",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic hypersensitivity",
    "EHS",
    "radiofrequency",
    "RF",
    "CDMA",
    "cellular phone",
    "provocation study",
    "sham-controlled",
    "heart rate variability",
    "subjective symptoms",
    "EMF perception"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.25,
      "reason": "Sham-controlled provocation study on self-reported EHS and RF exposure; relevant to broader RF health evidence base often summarized by WHO/ICNIRP."
    }
  ]
}
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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: 10.1002/bem.20518
PubMed: 19551766

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