{
  "version": "1.1.0",
  "fields": [
    {
      "name": "nct_id",
      "type": "str",
      "description": "ClinicalTrials.gov unique identifier (NCT######)"
    },
    {
      "name": "title",
      "type": "str",
      "description": "Brief title of the clinical study"
    },
    {
      "name": "official_title",
      "type": "str | None",
      "description": "Full official title of the study"
    },
    {
      "name": "status",
      "type": "str",
      "description": "Overall recruitment status (e.g. COMPLETED, RECRUITING)"
    },
    {
      "name": "start_date",
      "type": "str | None",
      "description": "Study start date (YYYY-MM-DD)"
    },
    {
      "name": "completion_date",
      "type": "str | None",
      "description": "Primary completion date (YYYY-MM-DD)"
    },
    {
      "name": "sponsor_name",
      "type": "str",
      "description": "Lead sponsor organization name"
    },
    {
      "name": "sponsor_class",
      "type": "str | None",
      "description": "Sponsor classification (INDUSTRY, NIH, OTHER_GOV, etc.)"
    },
    {
      "name": "conditions",
      "type": "list[str]",
      "description": "Medical conditions or diseases studied"
    },
    {
      "name": "study_type",
      "type": "str | None",
      "description": "Study type: INTERVENTIONAL or OBSERVATIONAL"
    },
    {
      "name": "phases",
      "type": "list[str]",
      "description": "Clinical trial phases (e.g. PHASE3)"
    },
    {
      "name": "enrollment",
      "type": "int | None",
      "description": "Target or actual enrollment count"
    },
    {
      "name": "allocation",
      "type": "str | None",
      "description": "Allocation method: RANDOMIZED or NON_RANDOMIZED"
    },
    {
      "name": "masking",
      "type": "str | None",
      "description": "Blinding type (e.g. DOUBLE, OPEN_LABEL)"
    },
    {
      "name": "interventions",
      "type": "list[dict]",
      "description": "Interventions with type, name, and description"
    },
    {
      "name": "primary_outcomes",
      "type": "list[dict]",
      "description": "Primary outcome measures with measure and time_frame"
    },
    {
      "name": "secondary_outcomes",
      "type": "list[dict]",
      "description": "Secondary outcome measures with measure and time_frame"
    },
    {
      "name": "minimum_age",
      "type": "str | dict | None",
      "description": "Minimum participant age (parsed value and unit)"
    },
    {
      "name": "maximum_age",
      "type": "str | dict | None",
      "description": "Maximum participant age (parsed value and unit)"
    },
    {
      "name": "sex",
      "type": "str | None",
      "description": "Eligible sex: ALL, FEMALE, or MALE"
    },
    {
      "name": "results_available",
      "type": "bool",
      "description": "Whether results have been posted to ClinicalTrials.gov"
    },
    {
      "name": "locations_count",
      "type": "int | None",
      "description": "Number of study sites / locations"
    },
    {
      "name": "countries",
      "type": "list[str]",
      "description": "Countries where the study is conducted"
    },
    {
      "name": "trial_duration_days",
      "type": "int | None",
      "description": "Days from start_date to completion_date. Null if either date missing."
    },
    {
      "name": "therapeutic_area",
      "type": "str",
      "description": "Disease area classification: Oncology, Cardiovascular, Neurology / CNS, Infectious Disease, Metabolic / Endocrine, Immunology / Rheumatology, Respiratory, Gastroenterology, Dermatology, Ophthalmology, Rare Disease / Orphan, Other."
    },
    {
      "name": "primary_endpoint_met",
      "type": "str",
      "description": "Whether the primary endpoint was achieved: 'true', 'false', or 'unknown'. Coverage: ~45% of records (those with posted results on ClinicalTrials.gov). Extracted by LLM from the results section."
    }
  ],
  "schema_hash": "5db9cfdee697b897f9a28d792fa1813a00d321ca97d7fea6e4c0507b237ef923"
}