{
  "format": "healthspanledger-research-codebook",
  "schemaVersion": 1,
  "dataset": {
    "id": "clinicaltrials-recruiting-sites",
    "name": "Peptide and GLP-1 recruiting study locations",
    "canonicalUrl": "https://healthspanledger.com/trials",
    "edition": "2026.08",
    "version": "91ffc6bcafe5"
  },
  "columns": [
    {
      "name": "compound_slugs",
      "type": "string",
      "nullable": false,
      "description": "Stable HealthspanLedger compound slugs attached to the study, separated by semicolons."
    },
    {
      "name": "nct_id",
      "type": "string",
      "nullable": false,
      "description": "ClinicalTrials.gov identifier for the study that registered this location."
    },
    {
      "name": "study_title",
      "type": "string",
      "nullable": false,
      "description": "Brief study title submitted by the sponsor to ClinicalTrials.gov."
    },
    {
      "name": "lead_sponsor",
      "type": "string",
      "nullable": false,
      "description": "Lead sponsor name submitted on the study record.",
      "missingMeaning": "The registry record publishes no lead sponsor name."
    },
    {
      "name": "phases",
      "type": "string",
      "nullable": false,
      "description": "Registered study phases separated by semicolons.",
      "missingMeaning": "The study record publishes no applicable trial phase."
    },
    {
      "name": "overall_status",
      "type": "string",
      "nullable": false,
      "description": "Study-level recruitment status submitted for the complete NCT record.",
      "missingMeaning": "The registry record publishes no overall study status."
    },
    {
      "name": "status_verified_date",
      "type": "string",
      "nullable": false,
      "description": "Month or date on which the sponsor says it last verified the overall status.",
      "missingMeaning": "The registry record publishes no status-verification date."
    },
    {
      "name": "last_update_post_date",
      "type": "string",
      "nullable": false,
      "description": "Date on which the sponsor's latest study-record update was posted.",
      "missingMeaning": "The registry record publishes no last-update post date."
    },
    {
      "name": "facility",
      "type": "string",
      "nullable": false,
      "description": "Facility name submitted for this exact study-location record.",
      "missingMeaning": "The source location row publishes no facility name."
    },
    {
      "name": "city",
      "type": "string",
      "nullable": false,
      "description": "City submitted for this exact study-location record.",
      "missingMeaning": "The source location row publishes no city."
    },
    {
      "name": "state_or_region",
      "type": "string",
      "nullable": true,
      "description": "State, province or region submitted for this exact study-location record.",
      "missingMeaning": "The source location row publishes no state or regional value."
    },
    {
      "name": "postal_code",
      "type": "string",
      "nullable": true,
      "description": "Postal code submitted for this exact study-location record.",
      "missingMeaning": "The source location row publishes no postal code."
    },
    {
      "name": "country",
      "type": "string",
      "nullable": false,
      "description": "Country submitted for this exact study-location record.",
      "missingMeaning": "The source location row publishes no country."
    },
    {
      "name": "latitude",
      "type": "number",
      "nullable": true,
      "description": "Latitude returned by ClinicalTrials.gov for the submitted location.",
      "unit": "decimal degrees",
      "missingMeaning": "ClinicalTrials.gov returns no latitude for this location."
    },
    {
      "name": "longitude",
      "type": "number",
      "nullable": true,
      "description": "Longitude returned by ClinicalTrials.gov for the submitted location.",
      "unit": "decimal degrees",
      "missingMeaning": "ClinicalTrials.gov returns no longitude for this location."
    },
    {
      "name": "site_statuses",
      "type": "string",
      "nullable": false,
      "description": "Every distinct status attached to repeated rows for this exact NCT and place, separated by semicolons.",
      "missingMeaning": "The source location rows publish no site-level status."
    },
    {
      "name": "status_conflict",
      "type": "boolean",
      "nullable": false,
      "description": "Whether repeated source rows for this exact NCT and place publish more than one status."
    },
    {
      "name": "source_location_rows",
      "type": "number",
      "nullable": false,
      "description": "Number of raw source location rows grouped into this public study-location record.",
      "unit": "source rows"
    },
    {
      "name": "registered_as_recruiting",
      "type": "boolean",
      "nullable": false,
      "description": "True only when the complete grouped site-status set is exactly RECRUITING."
    },
    {
      "name": "official_record_url",
      "type": "string",
      "nullable": false,
      "description": "Canonical public ClinicalTrials.gov page for the exact NCT study record."
    }
  ]
}