Physiological changes and symptoms associated with short-term exposure to electromagnetic fields: a randomized crossover provocation study.

Environmental health : a global access science source · 2022 · Mixed · Moderate evidence

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MixedModerate evidencePaper 5751

Study snapshot

PublicationEnvironmental health : a global access science source · 2022

Study typerandomized_trial

Reported directionMixed

Evidence ratingModerate

Abstract

BACKGROUND: The biological association between electromagnetic fields (EMF) and idiopathic environmental intolerance attributed to EMF (IEI-EMF) has not been established. To assess the physiological changes and symptoms associated with exposure to EMF, we conducted a randomized crossover provocation study. METHODS: We recruited 58 individuals with IEI-EMF (IEI-EMF group) and 92 individuals without IEI-EMF (control group). In a controlled environment, all participants received EMF signals mimicking those from mobile phone base stations in a randomized sequence under the blinded condition. During the course, participants reported their symptoms and whether they perceived EMF, and we monitored their physiological parameters, including blood pressure (BP), heart rate (HR), and HR variability. RESULTS: The IEI-EMF and control groups reported similar frequencies of symptoms during both the provocation and sham sessions. No participant could accurately identify the provocation. In both groups, physiological parameters were similar between the two sessions. The control group, but not the IEI-EMF group, had elevated HR when they perceived EMF exposure. CONCLUSIONS: No symptoms or changes in physiological parameters were found to be associated with short-term exposure to EMF, and no participant could accurately detect the presence of EMF. Moreover, the participants in the control group, but not those in the IEI-EMF group, had elevated HR when they perceived EMF.

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 directionmixed

PopulationAdults with idiopathic environmental intolerance attributed to EMF (IEI-EMF) and controls without IEI-EMF

Sample size150

Exposureshort-term

Evidence strengthModerateConfidence: 78% · Peer reviewed: yes

Main findings

In a blinded randomized crossover provocation study using EMF signals mimicking mobile phone base stations, IEI-EMF and control participants reported similar symptom frequencies during provocation and sham sessions, and no participant accurately identified the provocation. Physiological parameters (BP, HR, HRV) were similar between provocation and sham in both groups. The control group, but not the IEI-EMF group, showed elevated HR when they perceived EMF exposure.

Outcomes measured

Self-reported symptoms
Perceived EMF exposure (detection/identification)
Blood pressure (BP)
Heart rate (HR)
Heart rate variability (HRV)

Limitations

Specific EMF exposure parameters (e.g., frequency, intensity/SAR) not reported in the abstract
Short-term exposure only

View raw extracted JSON

{
  "study_type": "randomized_trial",
  "exposure": {
    "band": null,
    "source": "mobile phone base station (mimicked signals)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "short-term"
  },
  "population": "Adults with idiopathic environmental intolerance attributed to EMF (IEI-EMF) and controls without IEI-EMF",
  "sample_size": 150,
  "outcomes": [
    "Self-reported symptoms",
    "Perceived EMF exposure (detection/identification)",
    "Blood pressure (BP)",
    "Heart rate (HR)",
    "Heart rate variability (HRV)"
  ],
  "main_findings": "In a blinded randomized crossover provocation study using EMF signals mimicking mobile phone base stations, IEI-EMF and control participants reported similar symptom frequencies during provocation and sham sessions, and no participant accurately identified the provocation. Physiological parameters (BP, HR, HRV) were similar between provocation and sham in both groups. The control group, but not the IEI-EMF group, showed elevated HR when they perceived EMF exposure.",
  "effect_direction": "mixed",
  "limitations": [
    "Specific EMF exposure parameters (e.g., frequency, intensity/SAR) not reported in the abstract",
    "Short-term exposure only"
  ],
  "evidence_strength": "moderate",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic fields",
    "IEI-EMF",
    "electromagnetic hypersensitivity",
    "provocation study",
    "randomized crossover",
    "base station",
    "symptoms",
    "blood pressure",
    "heart rate",
    "heart rate variability",
    "blinded"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.35,
      "reason": "Provocation study on symptoms/physiology related to RF-EMF exposure, relevant to guideline and health-effect evidence base."
    }
  ]
}

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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: 10.1186/s12940-022-00843-1
PubMed: 35255916

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