Symptoms of ill health ascribed to electromagnetic field exposure--a questionnaire survey.

International journal of hygiene and environmental health · 2004 · Unclear · Low evidence

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UnclearLow evidencePaper 5235

Study snapshot

PublicationInternational journal of hygiene and environmental health · 2004

Study typecross_sectional

Reported directionUnclear

Evidence ratingLow

Abstract

From June 2001, health questionnaires were distributed to people who complained about symptoms of ill health which they ascribed to exposure to electromagnetic fields (EMF). The objective of the survey was to gain a better knowledge of the anxieties of complainants, to obtain hints of possible problems and of actions that should be taken to solve the problems. The survey was not designed to establish a causal association between exposure to EMF and symptoms of ill health. Within one year, 429 questionnaires were returned of which 394 persons reported symptoms. The average age of the complainants was 51.0 years and 57 percent were female. The complainants were older, had a higher educational level and were more likely to be married compared to the general Swiss population. A mean of 2.7 different symptoms were reported. Sleep disorders (58%), headaches (41%), nervousness or distress (19%), fatigue (18%), and concentration difficulties (16%) were most common complaints. Complainants related their symptoms most frequently to exposure to mobile phone base stations (74%), followed by mobile phones (36%), cordless phones (29%) and power lines (27%). No distinct symptoms related to a specific field source could be identified. Eighty-five percent of the people who consulted a public authority because of their symptoms were unsatisfied with the response, whereas consultation of self-help groups or building ecologists usually fulfilled expectations. Two thirds of complainants had taken some action to reduce their symptoms. The most common measure was to avoid exposure if possible. Removing or disconnecting indoor sources was judged to be the most effective action.

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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 typecross_sectional

Effect directionunclear

PopulationPeople in Switzerland who complained about symptoms they ascribed to EMF exposure

Sample size429

Exposurequestionnaire survey (June 2001 onward; returns within one year)

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Within one year, 429 questionnaires were returned; 394 respondents reported symptoms, with a mean of 2.7 symptoms per person. The most common complaints were sleep disorders (58%) and headaches (41%); symptoms were most frequently attributed to mobile phone base stations (74%), followed by mobile phones (36%), cordless phones (29%), and power lines (27%). No distinct symptom pattern could be linked to a specific field source; many respondents were dissatisfied with public authority responses and commonly reported avoidance/removal of indoor sources as actions, with disconnecting indoor sources judged most effective.

Outcomes measured

Self-reported symptoms attributed to EMF exposure (e.g., sleep disorders, headaches, nervousness/distress, fatigue, concentration difficulties)
Perceived EMF sources linked to symptoms
Satisfaction with responses from public authorities vs self-help groups/building ecologists
Self-reported actions taken to reduce symptoms and perceived effectiveness

Limitations

Survey explicitly not designed to establish a causal association between EMF exposure and symptoms
Exposure and outcomes are self-reported (no objective exposure assessment described)
Selection limited to people who already attributed symptoms to EMF (likely selection bias)
No comparison group described

View raw extracted JSON

{
  "study_type": "cross_sectional",
  "exposure": {
    "band": null,
    "source": "self-reported EMF sources (mobile phone base stations, mobile phones, cordless phones, power lines)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "questionnaire survey (June 2001 onward; returns within one year)"
  },
  "population": "People in Switzerland who complained about symptoms they ascribed to EMF exposure",
  "sample_size": 429,
  "outcomes": [
    "Self-reported symptoms attributed to EMF exposure (e.g., sleep disorders, headaches, nervousness/distress, fatigue, concentration difficulties)",
    "Perceived EMF sources linked to symptoms",
    "Satisfaction with responses from public authorities vs self-help groups/building ecologists",
    "Self-reported actions taken to reduce symptoms and perceived effectiveness"
  ],
  "main_findings": "Within one year, 429 questionnaires were returned; 394 respondents reported symptoms, with a mean of 2.7 symptoms per person. The most common complaints were sleep disorders (58%) and headaches (41%); symptoms were most frequently attributed to mobile phone base stations (74%), followed by mobile phones (36%), cordless phones (29%), and power lines (27%). No distinct symptom pattern could be linked to a specific field source; many respondents were dissatisfied with public authority responses and commonly reported avoidance/removal of indoor sources as actions, with disconnecting indoor sources judged most effective.",
  "effect_direction": "unclear",
  "limitations": [
    "Survey explicitly not designed to establish a causal association between EMF exposure and symptoms",
    "Exposure and outcomes are self-reported (no objective exposure assessment described)",
    "Selection limited to people who already attributed symptoms to EMF (likely selection bias)",
    "No comparison group described"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic fields",
    "EMF",
    "questionnaire",
    "self-reported symptoms",
    "sleep disorders",
    "headache",
    "mobile phone base stations",
    "mobile phones",
    "cordless phones",
    "power lines",
    "Switzerland"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.2,
      "reason": "Addresses symptoms attributed to EMF exposure and public responses; relevant to broader EMF health-risk discourse."
    }
  ]
}

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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: 10.1078/1438-4639-00269
PubMed: 15031956

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