Assessment of the temporal trend of the exposure of people to electromagnetic fields produced by base stations for mobile telephones.

{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "RF",
    "source": "base station",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "six-minute averaged measurements; measurements reported between 10 a.m. and 1 p.m.; hourly averages used to construct daily curve"
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Electric field (E-field) levels from mobile telephone base stations",
    "Temporal (daily) trend of exposure",
    "Relationship between E-field levels and phone traffic data"
  ],
  "main_findings": "Monitoring of six-minute averaged electric field levels from base stations of different typologies (TACS, GSM, DCS) was performed. The mean six-minute averaged E-field measured between 10 a.m. and 1 p.m. corresponded to 84% of the maximum daily six-minute averaged value. A comparison between measured field levels and phone traffic data was presented, and an hourly-average daily exposure curve was constructed.",
  "effect_direction": "unclear",
  "limitations": [
    "No quantitative E-field values reported in the abstract",
    "No information on number of base stations/measurement sites or sampling strategy in the abstract",
    "Population characteristics and proximity to base stations not described in the abstract",
    "Frequencies and measurement instrumentation/method details not provided in the abstract"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "base stations",
    "mobile telephones",
    "TACS",
    "GSM",
    "DCS",
    "electric field",
    "six-minute average",
    "temporal trend",
    "phone traffic data",
    "exposure monitoring"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.1,
      "reason": "Exposure monitoring is described, but no occupational setting is specified; included only weakly."
    }
  ]
}