start_date · Enrollment and dates

Meaning

Study start date as provided by the source registry. Registry dates can be partial before ingestion normalization.

Export shape

{
  "start_date": "example",
  "_provenance": {
    "start_date": {
      "source": "clinicaltrials-gov",
      "source_url": "https://clinicaltrials.gov",
      "effective": true
    }
  }
}

Provenance

Field provenance follows the dataset contract: values are source-qualified, and records not cleared for the paid release stay out of commercial snapshot/API responses. Each release probes a bounded sample of this field's advertised evidence links; the check outcome is shown here, and a link that did not resolve renders as UNVERIFIED rather than as resolved.

RESOLVEDevidence link: 31 sampled clinicaltrials-gov/drks/eudract/isrctn links resolved at the 2026-11-02 check

Related docs

• Full data dictionary
• Provenance model
• Coverage notes
• REST API reference