{
  "id": "studies:cosmos-cohort",
  "collection": "studies",
  "slug": "cosmos-cohort",
  "name": "COSMOS prospective cohort of mobile phone users",
  "summary": "An international prospective cohort that records phone use from operator data rather than recall, designed to address the recall-bias problem that limits the case–control literature.",
  "status": "provisional",
  "lastVerified": "2026-08-12",
  "data": {
    "authors": "COSMOS consortium",
    "year": 2024,
    "design": "cohort",
    "exposure": "Operator-recorded call time and data use, with long-term follow-up for cancer and other outcomes",
    "finding": "Published analyses to date report no association between mobile phone call time and headache, tinnitus, sleep quality or, in reported cancer analyses, brain tumour incidence. Follow-up is ongoing.",
    "limitations": "Follow-up is still short relative to plausible latency for brain tumours, and participants are volunteers. Consult the consortium's publication list for the current state rather than relying on any single result.",
    "weight": "moderate",
    "url": "https://www.ukcosmos.org/",
    "related": [
      "studies:who-rf-review-2024"
    ]
  },
  "sources": [
    {
      "id": "cosmos-2024",
      "title": "COSMOS cohort study of mobile phone use and health outcomes",
      "publisher": "Imperial College London / COSMOS consortium",
      "url": "https://www.ukcosmos.org/",
      "kind": "peer-reviewed",
      "retrieved": "2026-08-12"
    }
  ],
  "links": {
    "self": "https://emfbase.com/api/studies/cosmos-cohort",
    "html": "https://emfbase.com/studies/cosmos-cohort",
    "markdown": "https://emfbase.com/studies/cosmos-cohort.md",
    "collection": "https://emfbase.com/api/studies"
  }
}