{
  "slug": "clinical-trial-duplicate-subjects",
  "title": "The same volunteer, three trials, two identities.",
  "summary": "Duplicate enrolment in clinical trials is a safety problem before a data problem. Registries answer it by holding identities. There is a better shape.",
  "lede": "A participant enrolled at two sites for two studies is not primarily a data quality problem. They are a person receiving two investigational products that nobody assessed together. The industry answers this with shared registries of identifying information, which is a bigger database of exactly the thing participants are most reluctant to hand over.",
  "date": "2026-09-25",
  "reading_time": "17 min read",
  "category": "Regulated",
  "tags": [
    "clinical trials",
    "duplicate enrolment",
    "professional subjects",
    "research integrity",
    "participant safety",
    "decentralised trials",
    "privacy"
  ],
  "image": "https://cdn.twc.sh/images/igcache/Duplicate%20Trial%20Subjects/1200_630/blog.jpg",
  "url": "/blog/clinical-trial-duplicate-subjects.html",
  "wordcount": 3585,
  "related": [
    "one-human-many-accounts",
    "evv-phantom-visits",
    "proof-without-surveillance"
  ],
  "schema": "Article"
}