{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=retrospective+observation&page=2",
    "query": {
      "intervention": "retrospective observation",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=retrospective+observation&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-29T13:00:22.896Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT04201418",
      "title": "A Multicenter Observational Study to Evaluate the Effectiveness of Patisiran in Patients With Polyneuropathy of ATTRv Amyloidosis With a V122I or T60A Mutation",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hereditary Transthyretin-mediated (ATTRv) Amyloidosis",
        "Polyneuropathy"
      ],
      "interventions": [
        {
          "name": "Patisiran",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Alnylam Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 67,
      "start_date": "2019-12-18",
      "completion_date": "2022-05-24",
      "has_results": false,
      "last_update_posted_date": "2022-06-06",
      "last_synced_at": "2026-09-29T13:00:22.896Z",
      "location_count": 27,
      "location_summary": "Los Angeles, California • San Diego, California • Aurora, Colorado + 22 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Farmington",
          "state": "Connecticut"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04201418"
    },
    {
      "nct_id": "NCT02519413",
      "title": "Tecfidera Lymphocyte Chart Review",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Multiple Sclerosis"
      ],
      "interventions": [
        {
          "name": "dimethyl fumarate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Biogen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 483,
      "start_date": "2015-07",
      "completion_date": "2016-02",
      "has_results": false,
      "last_update_posted_date": "2016-08-26",
      "last_synced_at": "2026-09-29T13:00:22.896Z",
      "location_count": 10,
      "location_summary": "Homewood, Alabama • Newport Beach, California • Atlanta, Georgia + 6 more",
      "locations": [
        {
          "city": "Homewood",
          "state": "Alabama"
        },
        {
          "city": "Newport Beach",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Buffalo",
          "state": "New York"
        },
        {
          "city": "Patchogue",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02519413"
    },
    {
      "nct_id": "NCT03707743",
      "title": "Registry of Patients With Acute/Subacute Type B Aortic Dissection Treated by Means of the STABILISE Technique (STABILISE)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Aortic Dissection"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "IRCCS San Raffaele",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 200,
      "start_date": "2018-10-30",
      "completion_date": "2026-12-30",
      "has_results": false,
      "last_update_posted_date": "2026-01-15",
      "last_synced_at": "2026-09-29T13:00:22.896Z",
      "location_count": 9,
      "location_summary": "Stanford, California • Hartford, Connecticut • Boston, Massachusetts + 5 more",
      "locations": [
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "Hartford",
          "state": "Connecticut"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Camden",
          "state": "New Jersey"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03707743"
    },
    {
      "nct_id": "NCT06744374",
      "title": "A Comparative Effectiveness Study of Mortality Outcomes and Related Cardiopulmonary Events Among a Cohort of Chronic Obstructive Pulmonary Disease (COPD) Patients Who Initiate Breztri and Multiple Inhaler Triple Therapy (MITT) in the United States (US)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pulmonary Disease, Chronic Obstructive"
      ],
      "interventions": [
        {
          "name": "BGF",
          "type": "DRUG"
        },
        {
          "name": "MITT",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 22369,
      "start_date": "2024-02-29",
      "completion_date": "2024-03-30",
      "has_results": false,
      "last_update_posted_date": "2025-08-27",
      "last_synced_at": "2026-09-29T13:00:22.896Z",
      "location_count": 1,
      "location_summary": "Wilmington, Delaware",
      "locations": [
        {
          "city": "Wilmington",
          "state": "Delaware"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06744374"
    },
    {
      "nct_id": "NCT06595069",
      "title": "A Real-world Study to Assess the Characteristics and Long-term Effectiveness of Inclisiran in Chinese Adult Patients",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hypercholesterolemia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Novartis",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 600,
      "start_date": "2024-04-30",
      "completion_date": "2024-07-10",
      "has_results": false,
      "last_update_posted_date": "2024-09-19",
      "last_synced_at": "2026-09-29T13:00:22.896Z",
      "location_count": 1,
      "location_summary": "East Hanover, New Jersey",
      "locations": [
        {
          "city": "East Hanover",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06595069"
    },
    {
      "nct_id": "NCT04979780",
      "title": "Observational Studies in Cancer Associated Thrombosis for Rivaroxaban - United States Cohort",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Treatment of Venous Thromboembolism in Cancer Patients",
        "Prophylaxis of Recurrent Venous Thromboembolism in Cancer Patients"
      ],
      "interventions": [
        {
          "name": "Rivaroxaban (Xarelto, BAY59-7939)",
          "type": "DRUG"
        },
        {
          "name": "Low molecular weight heparin (LMWH)",
          "type": "DRUG"
        },
        {
          "name": "Direct Oral Anticoagulants (DOAC)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 3708,
      "start_date": "2021-07-20",
      "completion_date": "2022-03-31",
      "has_results": false,
      "last_update_posted_date": "2024-10-31",
      "last_synced_at": "2026-09-29T13:00:22.896Z",
      "location_count": 1,
      "location_summary": "Multiple Locations, Connecticut",
      "locations": [
        {
          "city": "Multiple Locations",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04979780"
    },
    {
      "nct_id": "NCT02775656",
      "title": "UCB Cimzia Pregnancy Follow-up Study",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Rheumatoid Arthritis (RA)",
        "Crohn's Disease (CD)",
        "Psoriatic Arthritis (PsA)",
        "Axial Spondyloarthritis and Ankylosing Spondylitis"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "UCB BIOSCIENCES, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "64 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 64 Years · Female only"
      },
      "enrollment_count": 1,
      "start_date": "2016-11",
      "completion_date": "2017-12",
      "has_results": false,
      "last_update_posted_date": "2021-04-22",
      "last_synced_at": "2026-09-29T13:00:22.896Z",
      "location_count": 1,
      "location_summary": "Wilmington, North Carolina",
      "locations": [
        {
          "city": "Wilmington",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02775656"
    },
    {
      "nct_id": "NCT06133049",
      "title": "A Study to Evaluate the Safety of Ozanimod Exposure During Pregnancy in Women With Multiple Sclerosis and Their Infants",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Multiple Sclerosis"
      ],
      "interventions": [
        {
          "name": "Ozanimod",
          "type": "DRUG"
        },
        {
          "name": "Select DMTs other than ozanimod",
          "type": "DRUG"
        },
        {
          "name": "No DMTs",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bristol-Myers Squibb",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "49 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 49 Years · Female only"
      },
      "enrollment_count": 2961,
      "start_date": "2021-03-16",
      "completion_date": "2031-08-31",
      "has_results": false,
      "last_update_posted_date": "2023-11-15",
      "last_synced_at": "2026-09-29T13:00:22.896Z",
      "location_count": 1,
      "location_summary": "Eden Prairie, Minnesota",
      "locations": [
        {
          "city": "Eden Prairie",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06133049"
    },
    {
      "nct_id": "NCT06608212",
      "title": "An Observational Study to Learn More About How Safe Finerenone is and How Well it Works in People With Chronic Kidney Disease and Type 2 Diabetes in Routine Medical Care in the United States",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Chronic Kidney Disease",
        "Type 2 Diabetes Mellitus"
      ],
      "interventions": [
        {
          "name": "Finerenone (Kerendia, BAY948862)",
          "type": "DRUG"
        },
        {
          "name": "Others except finerenone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 238038,
      "start_date": "2024-10-09",
      "completion_date": "2026-06-26",
      "has_results": false,
      "last_update_posted_date": "2026-09-24",
      "last_synced_at": "2026-09-29T13:00:22.896Z",
      "location_count": 1,
      "location_summary": "Whippany, New Jersey",
      "locations": [
        {
          "city": "Whippany",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06608212"
    },
    {
      "nct_id": "NCT01511913",
      "title": "A Multi-National, Prospective, Observational Study in Patients With Unresectable or Metastatic Melanoma",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Advanced Cutaneous Melanoma"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Bristol-Myers Squibb",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1411,
      "start_date": "2012-06-03",
      "completion_date": "2019-12-12",
      "has_results": false,
      "last_update_posted_date": "2021-12-28",
      "last_synced_at": "2026-09-29T13:00:22.896Z",
      "location_count": 24,
      "location_summary": "Gilbert, Arizona • Hot Springs, Arkansas • Encinitas, California + 20 more",
      "locations": [
        {
          "city": "Gilbert",
          "state": "Arizona"
        },
        {
          "city": "Hot Springs",
          "state": "Arkansas"
        },
        {
          "city": "Encinitas",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01511913"
    }
  ]
}