{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=No+intervention%2C+observational+retrospective+study",
    "query": {
      "intervention": "No intervention, observational retrospective study"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 34,
    "total_pages": 4,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=No+intervention%2C+observational+retrospective+study&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-28T00:49:21.651Z",
  "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": "NCT04091984",
      "title": "The PROspera Kidney Transplant ACTIVE Rejection Assessment Registry (ProActive)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Kidney Transplant Rejection"
      ],
      "interventions": [
        {
          "name": "Prospera",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Natera, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 5000,
      "start_date": "2019-11-06",
      "completion_date": "2027-10-01",
      "has_results": false,
      "last_update_posted_date": "2024-08-06",
      "last_synced_at": "2026-09-28T00:49:21.651Z",
      "location_count": 55,
      "location_summary": "Birmingham, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 45 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04091984"
    },
    {
      "nct_id": "NCT06355934",
      "title": "OverTTuRe: Characteristics, Treatment Patterns and Outcomes of Patients With ATTR Amyloidosis",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "ATTR Amyloidosis"
      ],
      "interventions": [
        {
          "name": "no intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 52121,
      "start_date": "2023-08-21",
      "completion_date": "2026-11-02",
      "has_results": false,
      "last_update_posted_date": "2026-09-09",
      "last_synced_at": "2026-09-28T00:49:21.651Z",
      "location_count": 1,
      "location_summary": "Eden Prairie, Minnesota",
      "locations": [
        {
          "city": "Eden Prairie",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06355934"
    },
    {
      "nct_id": "NCT03817281",
      "title": "Collective Accuryn Physiologic Signals and Signatures",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Critical Illness",
        "Acute Kidney Injury",
        "Sepsis",
        "Septic Shock",
        "Abdominal Compartment Syndrome"
      ],
      "interventions": [
        {
          "name": "Accuryn Monitoring System",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Potrero Medical",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2020-03-29",
      "completion_date": "2020-03-29",
      "has_results": false,
      "last_update_posted_date": "2021-01-13",
      "last_synced_at": "2026-09-28T00:49:21.651Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03817281"
    },
    {
      "nct_id": "NCT04669548",
      "title": "Physiologic Signals and Signatures With the Accuryn Monitoring System - The Accuryn Registry",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Intraabdominal Hypertension",
        "Abdominal Compartment Syndrome",
        "Acute Kidney Injury",
        "Cardiovascular Surgery"
      ],
      "interventions": [
        {
          "name": "Accuryn Monitoring System",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Potrero Medical",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2500,
      "start_date": "2020-12-21",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2022-09-28",
      "last_synced_at": "2026-09-28T00:49:21.651Z",
      "location_count": 9,
      "location_summary": "Los Angeles, California • San Francisco, California • Washington D.C., District of Columbia + 6 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Weston",
          "state": "Florida"
        },
        {
          "city": "Louisville",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04669548"
    },
    {
      "nct_id": "NCT06744673",
      "title": "A Study to Assess the Pregnancy Outcome in Women Exposed to Dayvigo® During Pregnancy Compared to an Unexposed Control Population",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sleep Initiation and Maintenance Disorders",
        "Pregnancy"
      ],
      "interventions": [
        {
          "name": "No Intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Eisai Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "49 Years",
        "sex": "FEMALE",
        "summary": "16 Years to 49 Years · Female only"
      },
      "enrollment_count": 861,
      "start_date": "2025-01-03",
      "completion_date": "2025-12-30",
      "has_results": false,
      "last_update_posted_date": "2025-06-19",
      "last_synced_at": "2026-09-28T00:49:21.651Z",
      "location_count": 1,
      "location_summary": "Nutley, New Jersey",
      "locations": [
        {
          "city": "Nutley",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06744673"
    },
    {
      "nct_id": "NCT05244096",
      "title": "COVID-19 & Psychiatry: A Retrospective Chart Review",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "No intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 65000,
      "start_date": "2022-01-12",
      "completion_date": "2025-03-30",
      "has_results": false,
      "last_update_posted_date": "2024-04-05",
      "last_synced_at": "2026-09-28T00:49:21.651Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05244096"
    },
    {
      "nct_id": "NCT05775744",
      "title": "Management of Postpartum Preeclampsia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Postpartum Preeclampsia"
      ],
      "interventions": [
        {
          "name": "Tight postpartum blood pressure control",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Rutgers, The State University of New Jersey",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 392,
      "start_date": "2023-03-28",
      "completion_date": "2024-03-26",
      "has_results": false,
      "last_update_posted_date": "2024-04-02",
      "last_synced_at": "2026-09-28T00:49:21.651Z",
      "location_count": 2,
      "location_summary": "Livingston, New Jersey • New Brunswick, New Jersey",
      "locations": [
        {
          "city": "Livingston",
          "state": "New Jersey"
        },
        {
          "city": "New Brunswick",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05775744"
    },
    {
      "nct_id": "NCT04970004",
      "title": "Study in Adult and Pediatric Patients With HSCT-TMA",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Stem Cell Transplant Complications",
        "Thrombotic Microangiopathies"
      ],
      "interventions": [
        {
          "name": "No intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Alexion Pharmaceuticals, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Month",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "1 Month and older"
      },
      "enrollment_count": 0,
      "start_date": "2021-07-12",
      "completion_date": "2022-04-01",
      "has_results": false,
      "last_update_posted_date": "2022-05-12",
      "last_synced_at": "2026-09-28T00:49:21.651Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04970004"
    },
    {
      "nct_id": "NCT04585555",
      "title": "Physiologic Signals and Signatures With the Accuryn Monitoring System (The Accuryn Registry)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Acute Kidney Injury",
        "Abdominal Compartment Syndrome",
        "Intraabdominal Hypertension",
        "Cardiovascular Surgery"
      ],
      "interventions": [
        {
          "name": "Accuryn Monitoring System",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Potrero Medical",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2017-07-10",
      "completion_date": "2019-11-05",
      "has_results": false,
      "last_update_posted_date": "2021-02-04",
      "last_synced_at": "2026-09-28T00:49:21.651Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04585555"
    },
    {
      "nct_id": "NCT06845631",
      "title": "Retrospective-Prospective PNS Study",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Chronic Pain"
      ],
      "interventions": [
        {
          "name": "PNS device, observational study, no intervention during study",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Curonix LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 40,
      "start_date": "2024-07-01",
      "completion_date": "2026-12-01",
      "has_results": false,
      "last_update_posted_date": "2025-02-25",
      "last_synced_at": "2026-09-28T00:49:21.651Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06845631"
    }
  ]
}