GSM base stations: short-term effects on well-being.

Bioelectromagnetics · 2009 · Mixed · Moderate evidence

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MixedModerate evidencePaper 4981

Participants exposed to high/medium GSM base station RF-EMF (scenarios HM and MH) were significantly calmer during those sessions than participants in the low-exposure reference scenario LL (P = 0.042). No significant differences were found for good mood or a…

Study snapshot

PublicationBioelectromagnetics · 2009

Study typerandomized_trial

Reported directionMixed

Evidence ratingModerate

Abstract

The purpose of this study was to examine the effects of short-term GSM (Global System for Mobile Communications) cellular phone base station RF-EMF (radiofrequency electromagnetic fields) exposure on psychological symptoms (good mood, alertness, calmness) as measured by a standardized well-being questionnaire. Fifty-seven participants were selected and randomly assigned to one of three different exposure scenarios. Each of those scenarios subjected participants to five 50-min exposure sessions, with only the first four relevant for the study of psychological symptoms. Three exposure levels were created by shielding devices in a field laboratory, which could be installed or removed during the breaks between sessions such that double-blinded conditions prevailed. The overall median power flux densities were 5.2 microW/m(2) during "low," 153.6 microW/m(2) during "medium," and 2126.8 microW/m(2) during "high" exposure sessions. For scenario HM and MH, the first and third sessions were "low" exposure. The second session was "high" and the fourth was "medium" in scenario HM; and vice versa for scenario MH. Scenario LL had four successive "low" exposure sessions constituting the reference condition. Participants in scenarios HM and MH (high and medium exposure) were significantly calmer during those sessions than participants in scenario LL (low exposure throughout) (P = 0.042). However, no significant differences between exposure scenarios in the "good mood" or "alertness" factors were obtained. We conclude that short-term exposure to GSM base station signals may have an impact on well-being by reducing psychological arousal.

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

PopulationParticipants (not further described)

Sample size57

ExposureRF · Five 50-min exposure sessions (first four relevant for psychological symptoms)

Evidence strengthModerateConfidence: 78% · Peer reviewed: yes

Main findings

Outcomes measured

Well-being questionnaire: good mood
Well-being questionnaire: alertness
Well-being questionnaire: calmness

Limitations

Short-term exposure only
Participant characteristics not described in abstract
Frequency and SAR not reported (exposure described via power flux density)
Only one outcome factor (calmness) showed a statistically significant difference

View raw extracted JSON

{
  "study_type": "randomized_trial",
  "exposure": {
    "band": "RF",
    "source": "base station",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "Five 50-min exposure sessions (first four relevant for psychological symptoms)"
  },
  "population": "Participants (not further described)",
  "sample_size": 57,
  "outcomes": [
    "Well-being questionnaire: good mood",
    "Well-being questionnaire: alertness",
    "Well-being questionnaire: calmness"
  ],
  "main_findings": "Participants exposed to high/medium GSM base station RF-EMF (scenarios HM and MH) were significantly calmer during those sessions than participants in the low-exposure reference scenario LL (P = 0.042). No significant differences were found for good mood or alertness.",
  "effect_direction": "mixed",
  "limitations": [
    "Short-term exposure only",
    "Participant characteristics not described in abstract",
    "Frequency and SAR not reported (exposure described via power flux density)",
    "Only one outcome factor (calmness) showed a statistically significant difference"
  ],
  "evidence_strength": "moderate",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "GSM",
    "base station",
    "RF-EMF",
    "radiofrequency",
    "double-blind",
    "randomized",
    "well-being",
    "mood",
    "alertness",
    "calmness",
    "power flux density"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.32,
      "reason": "Human experimental study of RF exposure from GSM base-station-like signals relevant to RF health evidence reviews."
    }
  ]
}

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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.20447
PubMed: 18803247

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