{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+study&page=21",
    "query": {
      "intervention": "Retrospective study",
      "page": 21
    },
    "page_size": 10
  },
  "pagination": {
    "page": 21,
    "page_size": 10,
    "total_count": 1214,
    "total_pages": 122,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+study&page=22&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+study&page=20&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-30T23:34:00.116Z",
  "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": "NCT02444169",
      "title": "Retrospective Evaluation of Combination Treatment With the Ulthera System",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Skin Laxity"
      ],
      "interventions": [
        {
          "name": "Ultherapy",
          "type": "DEVICE"
        },
        {
          "name": "Incobotulinumtoxin A",
          "type": "DRUG"
        },
        {
          "name": "Radiesse",
          "type": "DEVICE"
        },
        {
          "name": "Belotero Balance",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "DRUG"
      ],
      "sponsor": "Ulthera, Inc",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "25 Years to 70 Years"
      },
      "enrollment_count": 101,
      "start_date": "2015-04",
      "completion_date": "2015-07",
      "has_results": false,
      "last_update_posted_date": "2017-11-24",
      "last_synced_at": "2026-10-30T23:34:00.116Z",
      "location_count": 5,
      "location_summary": "Laguna Beach, California • San Diego, California • Coral Gables, Florida + 2 more",
      "locations": [
        {
          "city": "Laguna Beach",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Coral Gables",
          "state": "Florida"
        },
        {
          "city": "Hunt Valley",
          "state": "Maryland"
        },
        {
          "city": "Spokane",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02444169"
    },
    {
      "nct_id": "NCT04234139",
      "title": "Cohort/Ethics Study of Patients With Severe Alcoholic Hepatitis Undergoing Early Liver Transplantation",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Liver Diseases, Alcoholic",
        "Alcohol-Related Disorders",
        "Transplant; Failure, Liver",
        "Transplant; Complication, Rejection",
        "Liver Diseases",
        "Hepatitis, Alcoholic",
        "Alcohol-Induced Disorders"
      ],
      "interventions": [
        {
          "name": "liver transplant",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Johns Hopkins University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 300,
      "start_date": "2020-04-01",
      "completion_date": "2029-12-31",
      "has_results": false,
      "last_update_posted_date": "2025-12-16",
      "last_synced_at": "2026-10-30T23:34:00.116Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04234139"
    },
    {
      "nct_id": "NCT05284305",
      "title": "Desmoid Tumor and Pregnancy: Effect of Pregnancy on Disease Control and Effect of Diagnosis on Pregnancy History.",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Desmoid",
        "Desmoid; Abdominal",
        "Pregnancy Loss",
        "Pregnancy Complications"
      ],
      "interventions": [
        {
          "name": "Pregnancy",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Fondazione IRCCS Istituto Nazionale dei Tumori, Milano",
      "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": 400,
      "start_date": "2022-03-01",
      "completion_date": "2023-05-15",
      "has_results": false,
      "last_update_posted_date": "2023-01-27",
      "last_synced_at": "2026-10-30T23:34:00.116Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05284305"
    },
    {
      "nct_id": "NCT05960474",
      "title": "Coronary Microvascular Disease (CMD) Registry",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Coronary Microvascular Dysfunction"
      ],
      "interventions": [
        {
          "name": "Outcomes for Patients with CMD",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Medstar Health Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1000,
      "start_date": "2023-02-01",
      "completion_date": "2033-01",
      "has_results": false,
      "last_update_posted_date": "2024-06-07",
      "last_synced_at": "2026-10-30T23:34:00.116Z",
      "location_count": 3,
      "location_summary": "Washington D.C., District of Columbia • Hollywood, Florida • Clinton, Maryland",
      "locations": [
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "Clinton",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05960474"
    },
    {
      "nct_id": "NCT07866560",
      "title": "AKI and Delirium Risk Prediction and Cost Burden Study",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Acute Kidney Injury",
        "Delirium"
      ],
      "interventions": [
        {
          "name": "It is observational trial with no intervention being evaluated",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Nebraska",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "19 Years and older"
      },
      "enrollment_count": 25000,
      "start_date": "2026-09-01",
      "completion_date": "2027-09-28",
      "has_results": false,
      "last_update_posted_date": "2026-10-08",
      "last_synced_at": "2026-10-30T23:34:00.116Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07866560"
    },
    {
      "nct_id": "NCT03840057",
      "title": "Metoclopramide, Azithromycin, or Nondrug Pretreatment for UGIB to Reduce Second Endoscopy",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Gastro Intestinal Bleeding",
        "Upper Gastrointestinal Bleeding"
      ],
      "interventions": [
        {
          "name": "Azithromycin Injection",
          "type": "DRUG"
        },
        {
          "name": "Metoclopramide Injectable Solution",
          "type": "DRUG"
        },
        {
          "name": "Sodium chloride 0.9%",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Waihong Chung",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 435,
      "start_date": "2020-07-01",
      "completion_date": "2021-07",
      "has_results": false,
      "last_update_posted_date": "2020-08-07",
      "last_synced_at": "2026-10-30T23:34:00.116Z",
      "location_count": 1,
      "location_summary": "Providence, Rhode Island",
      "locations": [
        {
          "city": "Providence",
          "state": "Rhode Island"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03840057"
    },
    {
      "nct_id": "NCT02414919",
      "title": "Duration of Use of Highly Effective Reversible Contraception",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pregnancy"
      ],
      "interventions": [
        {
          "name": "Mirena (Levonorgestrel IUS, BAY86-5028)",
          "type": "DRUG"
        },
        {
          "name": "ParaGard",
          "type": "DRUG"
        },
        {
          "name": "Implanon/Nexplanon",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "15 Years",
        "maximum_age": "44 Years",
        "sex": "FEMALE",
        "summary": "15 Years to 44 Years · Female only"
      },
      "enrollment_count": 13880,
      "start_date": "2015-04-01",
      "completion_date": "2016-03-28",
      "has_results": false,
      "last_update_posted_date": "2017-03-16",
      "last_synced_at": "2026-10-30T23:34:00.116Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02414919"
    },
    {
      "nct_id": "NCT01166230",
      "title": "Longer-term Recurrence Rates in Patients With Bladder Cancer After Hexvix (Cysview)Fluorescence Cystoscopy/TURB",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Bladder Cancer"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Photocure",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 551,
      "start_date": "2010-06",
      "completion_date": "2010-12",
      "has_results": true,
      "last_update_posted_date": "2019-04-09",
      "last_synced_at": "2026-10-30T23:34:00.116Z",
      "location_count": 14,
      "location_summary": "Stanford, California • Gainesville, Florida • Miami, Florida + 10 more",
      "locations": [
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Pembroke Pines",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01166230"
    },
    {
      "nct_id": "NCT01536457",
      "title": "Reflux Disease Therapy in the Management of Childhood Asthma-data Entry and Analysis Only",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Asthma",
        "Gastroesophageal Reflux Disease"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Children's Center for Digestive Health Care",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "4 Years",
        "maximum_age": "11 Years",
        "sex": "ALL",
        "summary": "4 Years to 11 Years"
      },
      "enrollment_count": 59,
      "start_date": "2011-07",
      "completion_date": "2013-01",
      "has_results": false,
      "last_update_posted_date": "2015-02-11",
      "last_synced_at": "2026-10-30T23:34:00.116Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01536457"
    },
    {
      "nct_id": "NCT05611398",
      "title": "Lactate Monitoring in Traumatic Long Bone Fractures Requiring Emergent Surgical Intervention",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Lactate Blood Increase",
        "Trauma Blunt",
        "Trauma, Secondary",
        "Injury Traumatic"
      ],
      "interventions": [
        {
          "name": "Orthopedic Surgery",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Arrowhead Regional Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 164,
      "start_date": "2021-01-01",
      "completion_date": "2022-01-01",
      "has_results": false,
      "last_update_posted_date": "2022-11-10",
      "last_synced_at": "2026-10-30T23:34:00.116Z",
      "location_count": 1,
      "location_summary": "Colton, California",
      "locations": [
        {
          "city": "Colton",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05611398"
    }
  ]
}