Effects of website-based risk communication of radio-frequency electromagnetic fields on general public.

Frontiers in public health · 2024 · Mixed · Moderate evidence

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MixedModerate evidencePaper 5827

Study snapshot

PublicationFrontiers in public health · 2024

Study typerandomized_trial

Reported directionMixed

Evidence ratingModerate

Abstract

BACKGROUND: Radio-frequency electromagnetic fields (RF-EMFs) are utilized in communications and appliances and are indispensable in daily life. However, some people have concerns about the adverse health effects of RF-EMFs; therefore, effective risk communication (RC) is needed in this field. OBJECTIVE: In this study, we investigate public attitudes towards RF-EMFs and examine the impact of RC via a website on these attitudes and objective knowledge. METHODS: Three web surveys were conducted over 10 weeks with the same participants. The questionnaires were conducted at three different time points with 5-week intervals: baseline survey (T1), RC evaluation survey (T2), and follow-up survey (T3). Participants of T2 were randomly recruited from among those of T1, and participants of T3 were randomly selected from among the T2 respondents. Approximately half of the respondents in each of T2 and T3 were assigned to the control group. Twelve items regarding attitudes toward RF-EMFs and objective knowledge were evaluated in all surveys (T1-T3). After removing low-engagement data, the number of valid answers was 782 in T3. Differences between T1 and T2 (Sub T1-T2) and T1 and T3 (Sub T1-T3) were analyzed. Participant selection was randomized and the authors were blind to this selection until analysis. RESULTS: Four clusters were identified: Cluster 1 (Non-anxious, 25.0%), Cluster 2 (Anxious, 16.0%), Cluster 3 (Low-interest, 40.5%), and Cluster 4 (High-interest, 18.5%). A decrease in subjective RF-EMF exposure levels was noted in Cluster 2 immediately after website viewing. Temporary increases and decreases in health concerns about RF-EMF usage activities were observed in Clusters 1 and 2, respectively, immediately after viewing. Clusters 1 and 3 showed a temporal decrease in needs for RF-EMF usage activities at T2 but it returned to the baseline level 5 weeks later. Cluster 4 was less responsive to the risk communication. Subanalysis stratified by gender and age showed fluctuations in responses, especially in Clusters 1 and 2. CONCLUSION: We demonstrate the effectiveness of RF-EMF risk communication via websites, particularly for Cluster 2. The results of this study showed that offering objective and comprehensible information through a website can significantly reduce concerns and perceived risks related to RF-EMFs.

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

PopulationGeneral public (web survey participants)

Sample size782

ExposureRF · 10 weeks (three surveys with 5-week intervals; effects assessed immediately after viewing and at 5-week follow-up)

Evidence strengthModerateConfidence: 74% · Peer reviewed: yes

Main findings

Across three web surveys over 10 weeks with control groups at T2 and T3, four attitude clusters were identified. Some clusters showed short-term changes after viewing the website (e.g., decreased subjective exposure in the anxious cluster; temporary changes in health concerns and needs for RF-EMF usage activities), with some effects returning to baseline by 5 weeks; the high-interest cluster was less responsive. The authors conclude that objective, comprehensible website information can reduce concerns and perceived risks related to RF-EMFs, particularly in the anxious cluster.

Outcomes measured

Attitudes toward RF-EMFs (including perceived/subjective exposure levels, health concerns, perceived risks, needs for RF-EMF usage activities)
Objective knowledge about RF-EMFs

Limitations

Details of the risk communication content and the control condition are not described in the abstract
Objective knowledge results are mentioned as evaluated but specific findings are not reported in the abstract
Attrition/selection across timepoints is implied (T2 and T3 sampled from prior waves), but numbers at T1/T2 are not provided in the abstract
Outcomes are self-reported attitudes for several measures; durability of effects appears limited for some outcomes (returned to baseline at 5 weeks)

View raw extracted JSON

{
  "study_type": "randomized_trial",
  "exposure": {
    "band": "RF",
    "source": "website-based risk communication about RF-EMFs",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "10 weeks (three surveys with 5-week intervals; effects assessed immediately after viewing and at 5-week follow-up)"
  },
  "population": "General public (web survey participants)",
  "sample_size": 782,
  "outcomes": [
    "Attitudes toward RF-EMFs (including perceived/subjective exposure levels, health concerns, perceived risks, needs for RF-EMF usage activities)",
    "Objective knowledge about RF-EMFs"
  ],
  "main_findings": "Across three web surveys over 10 weeks with control groups at T2 and T3, four attitude clusters were identified. Some clusters showed short-term changes after viewing the website (e.g., decreased subjective exposure in the anxious cluster; temporary changes in health concerns and needs for RF-EMF usage activities), with some effects returning to baseline by 5 weeks; the high-interest cluster was less responsive. The authors conclude that objective, comprehensible website information can reduce concerns and perceived risks related to RF-EMFs, particularly in the anxious cluster.",
  "effect_direction": "mixed",
  "limitations": [
    "Details of the risk communication content and the control condition are not described in the abstract",
    "Objective knowledge results are mentioned as evaluated but specific findings are not reported in the abstract",
    "Attrition/selection across timepoints is implied (T2 and T3 sampled from prior waves), but numbers at T1/T2 are not provided in the abstract",
    "Outcomes are self-reported attitudes for several measures; durability of effects appears limited for some outcomes (returned to baseline at 5 weeks)"
  ],
  "evidence_strength": "moderate",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "RF-EMF",
    "risk communication",
    "website",
    "public attitudes",
    "perceived risk",
    "health concerns",
    "objective knowledge",
    "web survey",
    "randomized assignment",
    "cluster analysis"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.25,
      "reason": "Study concerns public risk communication about RF-EMF health concerns, relevant to broader RF-EMF health guidance context."
    }
  ]
}

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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: 10.3389/fpubh.2024.1438986
PubMed: 39296830

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