{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+study&page=4",
    "query": {
      "intervention": "Retrospective study",
      "page": 4
    },
    "page_size": 10
  },
  "pagination": {
    "page": 4,
    "page_size": 10,
    "total_count": 1213,
    "total_pages": 122,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+study&page=5&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+study&page=3&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-29T08:20:38.680Z",
  "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": "NCT01384448",
      "title": "Stress Echocardiography and Heart Computed Tomography (CT) Scan in Emergency Department Patients With Chest Pain",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Chest Pain",
        "Angina",
        "Angina Pectoris",
        "Coronary Artery Disease"
      ],
      "interventions": [
        {
          "name": "Stress Echocardiography",
          "type": "PROCEDURE"
        },
        {
          "name": "Coronary CT Angiography",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Montefiore Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "30 Years and older"
      },
      "enrollment_count": 400,
      "start_date": "2011-08",
      "completion_date": "2017-02",
      "has_results": false,
      "last_update_posted_date": "2018-10-11",
      "last_synced_at": "2026-10-29T08:20:38.680Z",
      "location_count": 1,
      "location_summary": "The Bronx, New York",
      "locations": [
        {
          "city": "The Bronx",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01384448"
    },
    {
      "nct_id": "NCT01178333",
      "title": "Heparin-Induced Thrombocytopenia - Retrospective Analysis of Data on Incidence and Outcomes Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Heparin Induced Thrombocytopenia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Carelon Research",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 668,
      "start_date": "2010-06",
      "completion_date": "2010-12",
      "has_results": true,
      "last_update_posted_date": "2015-05-22",
      "last_synced_at": "2026-10-29T08:20:38.680Z",
      "location_count": 21,
      "location_summary": "Iowa City, Iowa • New Orleans, Louisiana • Baltimore, Maryland + 12 more",
      "locations": [
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01178333"
    },
    {
      "nct_id": "NCT02061748",
      "title": "The Comparative Safety and Effectiveness of Warfarin and Dabigatran Prescribed in the Non-valvular Atrial Fibrillation Population With Humana Healthcare Coverage",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "Observational",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Boehringer Ingelheim",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "89 Years",
        "sex": "ALL",
        "summary": "18 Years to 89 Years"
      },
      "enrollment_count": 38499,
      "start_date": "2014-10-28",
      "completion_date": "2016-03-15",
      "has_results": true,
      "last_update_posted_date": "2017-06-08",
      "last_synced_at": "2026-10-29T08:20:38.680Z",
      "location_count": 1,
      "location_summary": "Louisville, Kentucky",
      "locations": [
        {
          "city": "Louisville",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02061748"
    },
    {
      "nct_id": "NCT03827343",
      "title": "Retrospective Study of Immunotherapy Related Toxicities and Factors Impacting Outcomes in Children and Adults With Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Macrophage Activation Syndrome",
        "Primary Hemophagocytic Lymphohistiocytosis"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Month",
        "maximum_age": "120 Years",
        "sex": "ALL",
        "summary": "1 Month to 120 Years"
      },
      "enrollment_count": 500,
      "start_date": "2019-01-23",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-10-08",
      "last_synced_at": "2026-10-29T08:20:38.680Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03827343"
    },
    {
      "nct_id": "NCT04384276",
      "title": "Weigh Easy: Simplifying Home Weight Monitoring for Infants",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cleft Lip and Palate"
      ],
      "interventions": [
        {
          "name": "The Weigh Easy System",
          "type": "OTHER"
        },
        {
          "name": "Retrospective Control",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Children's Mercy Hospital Kansas City",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "12 Weeks",
        "sex": "ALL",
        "summary": "Up to 12 Weeks"
      },
      "enrollment_count": 157,
      "start_date": "2020-10-01",
      "completion_date": "2022-09-30",
      "has_results": false,
      "last_update_posted_date": "2023-01-17",
      "last_synced_at": "2026-10-29T08:20:38.680Z",
      "location_count": 1,
      "location_summary": "Kansas City, Missouri",
      "locations": [
        {
          "city": "Kansas City",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04384276"
    },
    {
      "nct_id": "NCT01077323",
      "title": "A Retrospective Cohort Study of Acute Pancreatitis in Relation to Use of Exenatide and Other Antidiabetic Agents",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Type 2 Diabetes (Treated With Exenatide or Other Oral Antidiabetic Therapies)",
        "Healthy Subjects (Treated With no Diabetes Therapies)"
      ],
      "interventions": [
        {
          "name": "exenatide",
          "type": "DRUG"
        },
        {
          "name": "Other antidiabetic therapies",
          "type": "DRUG"
        },
        {
          "name": "No diabetes therapy",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 363766,
      "start_date": "2004-09",
      "completion_date": "2008-03",
      "has_results": true,
      "last_update_posted_date": "2015-04-15",
      "last_synced_at": "2026-10-29T08:20:38.680Z",
      "location_count": 1,
      "location_summary": "Waltham, Massachusetts",
      "locations": [
        {
          "city": "Waltham",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01077323"
    },
    {
      "nct_id": "NCT03563976",
      "title": "Multiparametric Image Analysis and Correlation With Outcomes in Lung Cancer Screening and Early Stage Lung Cancer",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Lung Cancer"
      ],
      "interventions": [
        {
          "name": "Retrospective Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Texas Southwestern Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "18 Years to 99 Years"
      },
      "enrollment_count": 2000,
      "start_date": "2015-02-18",
      "completion_date": "2031-06-30",
      "has_results": false,
      "last_update_posted_date": "2026-04-22",
      "last_synced_at": "2026-10-29T08:20:38.680Z",
      "location_count": 1,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03563976"
    },
    {
      "nct_id": "NCT01048450",
      "title": "Surgical Treatment for Hallux Rigidus",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hallux Limitus",
        "Hallux Rigidus"
      ],
      "interventions": [
        {
          "name": "Joint Resection- Keller Procedure",
          "type": "RADIATION"
        },
        {
          "name": "Joint Fusion",
          "type": "PROCEDURE"
        },
        {
          "name": "Hemi-metallic Joint Implant",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "RADIATION",
        "PROCEDURE"
      ],
      "sponsor": "American College of Foot and Ankle Surgeons",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "21 Years and older"
      },
      "enrollment_count": 158,
      "start_date": "2009-07",
      "completion_date": "2011-06",
      "has_results": false,
      "last_update_posted_date": "2011-08-19",
      "last_synced_at": "2026-10-29T08:20:38.680Z",
      "location_count": 6,
      "location_summary": "Greeley, Colorado • Des Moines, Iowa • Scituate, Massachusetts + 3 more",
      "locations": [
        {
          "city": "Greeley",
          "state": "Colorado"
        },
        {
          "city": "Des Moines",
          "state": "Iowa"
        },
        {
          "city": "Scituate",
          "state": "Massachusetts"
        },
        {
          "city": "Southfield",
          "state": "Michigan"
        },
        {
          "city": "Youngstown",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01048450"
    },
    {
      "nct_id": "NCT01465542",
      "title": "Treatment of APAP Toxicity With IV and Oral NAC 2008-2011",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Acetaminophen Toxicity"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Akron Children's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Month",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "1 Month to 21 Years"
      },
      "enrollment_count": 47,
      "start_date": "2011-06",
      "completion_date": "2011-11",
      "has_results": false,
      "last_update_posted_date": "2023-07-25",
      "last_synced_at": "2026-10-29T08:20:38.680Z",
      "location_count": 1,
      "location_summary": "Akron, Ohio",
      "locations": [
        {
          "city": "Akron",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01465542"
    },
    {
      "nct_id": "NCT00200031",
      "title": "A Cost Analysis of Interstim Therapy",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Urinary Retention and Symptoms of Overactive Bladder (Urge, Frequency)"
      ],
      "interventions": [
        {
          "name": "Interstim therapy",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "MedtronicNeuro",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 150,
      "start_date": "2005-07",
      "completion_date": "2006-04",
      "has_results": false,
      "last_update_posted_date": "2008-07-28",
      "last_synced_at": "2026-10-29T08:20:38.680Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00200031"
    }
  ]
}