Non-Ionizing Radiation, Part 2: Radiofrequency Electromagnetic Fields

Abstract

This Volume of the IARC Monographs provides an evaluation of the carcinogenic hazards associated with exposure to electromagnetic radiation in the radiofrequency range (30 kHz to 300 GHz). Human exposures to radiofrequency electromagnetic fields can occur from use of personal devices (e.g. mobile telephones, cordless phones, Bluetooth, and amateur radios), from occupational sources (e.g. high-frequency dielectric and induction heaters, high-powered pulsed radars), and from environmental sources (e.g. mobile-phone base stations, broadcast antennae, and medical applications). The general population receives the highest exposure from transmitters close to the body, including hand-held devices such as mobile telephones. Typical exposures to the brain from mobile-phone base stations and from television and radio stations are several orders of magnitude lower than those from second-generation GSM handsets, while 3G phones emit, on average, about 100 times less radiofrequency energy than GSM phones. Similarly, the average output power of Bluetooth wireless hands-free kits is estimated to be around 100 times less than that of mobile phones. An IARC Monographs Working Group reviewed epidemiological evidence, cancer bioassays, and mechanistic and other relevant data to reach conclusions as to the carcinogenic hazard to humans from exposure to these electromagnetic fields. With “limited evidence” for carcinogenicity in humans based on an increased risk of glioma – a malignant brain tumour – among heavy users of mobile telephones, radiofrequency electromagnetic fields were classified as “possibly carcinogenic to humans” (Group 2B).

AI evidence extraction

Main findings

This IARC Monograph evaluated carcinogenic hazards from radiofrequency electromagnetic fields (30 kHz to 300 GHz) using epidemiological, animal, and mechanistic evidence. Based on limited evidence in humans, including an increased risk of glioma among heavy users of mobile telephones, RF electromagnetic fields were classified as possibly carcinogenic to humans (Group 2B).

Outcomes measured

• carcinogenic hazard
• glioma

Limitations

• Monograph evaluation rather than a single primary study
• Human evidence described as limited
• No sample size reported in the abstract

Suggested hubs

• who-icnirp (0.95)
  IARC Monograph evaluating RF carcinogenic hazard with major relevance to international EMF risk assessment and policy.
• occupational-exposure (0.55)
  The abstract explicitly includes occupational RF sources among the exposures considered.

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        "source": "mobile phone, cordless phone, Bluetooth, amateur radio, occupational, base station, broadcast antenna, medical applications",
        "frequency_mhz": null,
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        "duration": null
    },
    "population": "Humans and experimental evidence reviewed by an IARC Working Group",
    "sample_size": null,
    "outcomes": [
        "carcinogenic hazard",
        "glioma"
    ],
    "main_findings": "This IARC Monograph evaluated carcinogenic hazards from radiofrequency electromagnetic fields (30 kHz to 300 GHz) using epidemiological, animal, and mechanistic evidence. Based on limited evidence in humans, including an increased risk of glioma among heavy users of mobile telephones, RF electromagnetic fields were classified as possibly carcinogenic to humans (Group 2B).",
    "effect_direction": "harm",
    "limitations": [
        "Monograph evaluation rather than a single primary study",
        "Human evidence described as limited",
        "No sample size reported in the abstract"
    ],
    "evidence_strength": "moderate",
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    "peer_reviewed_likely": "yes",
    "keywords": [
        "IARC",
        "radiofrequency electromagnetic fields",
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        "carcinogenicity",
        "glioma",
        "mobile telephones",
        "Group 2B",
        "occupational exposure",
        "base stations"
    ],
    "suggested_hubs": [
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            "reason": "IARC Monograph evaluating RF carcinogenic hazard with major relevance to international EMF risk assessment and policy."
        },
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}

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