Effects of short-term W-CDMA mobile phone base station exposure on women with or without mobile phone related symptoms.

Bioelectromagnetics · 2009 · No effect · Moderate evidence

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No effectModerate evidencePaper 4982

Study snapshot

PublicationBioelectromagnetics · 2009

Study typerandomized_trial

Reported directionNo effect

Evidence ratingModerate

Abstract

To investigate possible health effects of mobile phone use, we conducted a double-blind, cross-over provocation study to confirm whether subjects with mobile phone related symptoms (MPRS) are more susceptible than control subjects to the effect of electromagnetic fields (EMF) emitted from base stations. We sent questionnaires to 5,000 women and obtained 2,472 valid responses from possible candidates; from these, we recruited 11 subjects with MPRS and 43 controls. There were four EMF exposure conditions, each of which lasted 30 min: continuous, intermittent, and sham exposure with and without noise. Subjects were exposed to EMF of 2.14 GHz, 10 V/m (W-CDMA), in a shielded room to simulate whole-body exposure to EMF from base stations, although the exposure strength we used was higher than that commonly received from base stations. We measured several psychological and cognitive parameters pre- and post-exposure, and monitored autonomic functions. Subjects were asked to report on their perception of EMF and level of discomfort during the experiment. The MPRS group did not differ from the controls in their ability to detect exposure to EMF; nevertheless they consistently experienced more discomfort, regardless of whether or not they were actually exposed to EMF, and despite the lack of significant changes in their autonomic functions. Thus, the two groups did not differ in their responses to real or sham EMF exposure according to any psychological, cognitive or autonomic assessment. In conclusion, we found no evidence of any causal link between hypersensitivity symptoms and exposure to EMF from base stations.

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

PopulationWomen with mobile phone related symptoms (MPRS) and control women

Sample size54

ExposureRF · 2140 MHz · 30 min per condition (four conditions: continuous, intermittent, sham with/without noise)

Evidence strengthModerateConfidence: 78% · Peer reviewed: yes

Main findings

In a double-blind cross-over provocation study (2.14 GHz, 10 V/m), women with mobile phone related symptoms did not differ from controls in their ability to detect EMF exposure. The MPRS group reported more discomfort regardless of real or sham exposure, with no significant autonomic changes; overall, no differences were found between groups in psychological, cognitive, or autonomic responses to real versus sham exposure.

Outcomes measured

Ability to detect EMF exposure
Self-reported discomfort level
Psychological parameters (pre/post exposure)
Cognitive parameters (pre/post exposure)
Autonomic functions

Limitations

Small number of symptomatic participants (11 MPRS)
Exposure strength used was higher than that commonly received from base stations
Short-term exposure only (30 min per condition)
Study limited to women

View raw extracted JSON

{
  "study_type": "randomized_trial",
  "exposure": {
    "band": "RF",
    "source": "base station",
    "frequency_mhz": 2140,
    "sar_wkg": null,
    "duration": "30 min per condition (four conditions: continuous, intermittent, sham with/without noise)"
  },
  "population": "Women with mobile phone related symptoms (MPRS) and control women",
  "sample_size": 54,
  "outcomes": [
    "Ability to detect EMF exposure",
    "Self-reported discomfort level",
    "Psychological parameters (pre/post exposure)",
    "Cognitive parameters (pre/post exposure)",
    "Autonomic functions"
  ],
  "main_findings": "In a double-blind cross-over provocation study (2.14 GHz, 10 V/m), women with mobile phone related symptoms did not differ from controls in their ability to detect EMF exposure. The MPRS group reported more discomfort regardless of real or sham exposure, with no significant autonomic changes; overall, no differences were found between groups in psychological, cognitive, or autonomic responses to real versus sham exposure.",
  "effect_direction": "no_effect",
  "limitations": [
    "Small number of symptomatic participants (11 MPRS)",
    "Exposure strength used was higher than that commonly received from base stations",
    "Short-term exposure only (30 min per condition)",
    "Study limited to women"
  ],
  "evidence_strength": "moderate",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "W-CDMA",
    "base station",
    "RF-EMF",
    "2.14 GHz",
    "provocation study",
    "double-blind",
    "cross-over",
    "electromagnetic hypersensitivity",
    "mobile phone related symptoms",
    "discomfort",
    "autonomic function"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.35,
      "reason": "Provocation study on reported EMF hypersensitivity symptoms and RF base-station-like exposure, relevant to guideline/policy discussions."
    }
  ]
}

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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.20446
PubMed: 18780296

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