RF Safe

Assessing the Risk Associated with Simultaneous Exposure To Mobile Communication Signals Within 900-2500 MHz in Nigeria

Radiation protection dosimetry · 2020 · No effect · Low evidence

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No effectLow evidencePaper 1549

At 200 m from base station masts in Lagos, Ibadan and Abuja, the maximum total electric field strengths were 0.83 V/m, 0.53 V/m and 1.63 V/m, respectively. The estimated exposure quotient for simultaneous exposure to the four mobile communication bands in eac…

Study snapshot

PublicationRadiation protection dosimetry · 2020
Study typeexposure_assessment
Reported directionNo effect
Evidence ratingLow

Abstract

Assessing the Risk Associated with Simultaneous Exposure To Mobile Communication Signals Within 900-2500 MHz in Nigeria B O Ayinmode, I P Farai. Assessing The Risk Associated with Simultaneous Exposure To Mobile Communication Signals Within 900-2500 MHz in Nigeria. Radiat Prot Dosimetry. 2020 Dec 31;ncaa203. doi: 10.1093/rpd/ncaa203. Abstract In this study, the total exposure due to signals within GSM 900, GSM 1800, CDMA-1900 and 3G-2100 frequency bands at 200 m from the foot of 120, 100 and 80 base station masts in the Nigerian cities of Lagos, Ibadan and Abuja, respectively, was assessed. A calibrated hand-held spectrum analyser was used to measure the level of power (in dBm) of each signal within the mobile frequency bands. The exposure quotient associated with the combine electric field strengths from the various frequency bands in each city was estimated. The maximum value of total electric field strength at each point in Lagos, Ibadan and Abuja was 0.83 V/m, 0.53 V/m and 1.63 V/m, respectively. This study shows that the exposure quotient due to the simultaneous exposure to the four bands of mobile communication signals in each city is far less than one, as recommend by International Commission on Non-Ionizing Radiation Protection. pubmed.ncbi.nlm.nih.gov

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 typeexposure_assessment
Effect directionno_effect
PopulationNot supplied
Sample sizeNot supplied
ExposureRF
Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

At 200 m from base station masts in Lagos, Ibadan and Abuja, the maximum total electric field strengths were 0.83 V/m, 0.53 V/m and 1.63 V/m, respectively. The estimated exposure quotient for simultaneous exposure to the four mobile communication bands in each city was reported as far less than one relative to ICNIRP recommendations.

Outcomes measured

  • Power level (dBm) within GSM 900, GSM 1800, CDMA-1900 and 3G-2100 bands
  • Combined electric field strength (V/m)
  • Exposure quotient relative to ICNIRP recommendation

Limitations

  • Assessment limited to measurements at 200 m from base station masts
  • Only four mobile communication bands were assessed (GSM 900, GSM 1800, CDMA-1900, 3G-2100)
  • No health outcomes were measured; results are exposure metrics and comparison to guideline quotient
View raw extracted JSON
{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "RF",
    "source": "base station",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Power level (dBm) within GSM 900, GSM 1800, CDMA-1900 and 3G-2100 bands",
    "Combined electric field strength (V/m)",
    "Exposure quotient relative to ICNIRP recommendation"
  ],
  "main_findings": "At 200 m from base station masts in Lagos, Ibadan and Abuja, the maximum total electric field strengths were 0.83 V/m, 0.53 V/m and 1.63 V/m, respectively. The estimated exposure quotient for simultaneous exposure to the four mobile communication bands in each city was reported as far less than one relative to ICNIRP recommendations.",
  "effect_direction": "no_effect",
  "limitations": [
    "Assessment limited to measurements at 200 m from base station masts",
    "Only four mobile communication bands were assessed (GSM 900, GSM 1800, CDMA-1900, 3G-2100)",
    "No health outcomes were measured; results are exposure metrics and comparison to guideline quotient"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "Nigeria",
    "Lagos",
    "Ibadan",
    "Abuja",
    "base station",
    "GSM 900",
    "GSM 1800",
    "CDMA-1900",
    "3G-2100",
    "spectrum analyser",
    "electric field strength",
    "exposure quotient",
    "ICNIRP"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.78,
      "reason": "Exposure quotient is compared to ICNIRP recommendations."
    }
  ]
}
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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: 10.1093/rpd/ncaa203
PubMed: 33382430

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