{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+Populations",
    "query": {
      "intervention": "Retrospective Populations"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 58,
    "total_pages": 6,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+Populations&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-21T20:23:12.206Z",
  "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": "NCT01594541",
      "title": "A Retrospective Analysis of Cerefolin NAC® in Cognitively Impaired Patients",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Mild Cognitive Impairment"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Pamlab, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": "89 Years",
        "sex": "ALL",
        "summary": "55 Years to 89 Years"
      },
      "enrollment_count": 700,
      "start_date": "2013-01",
      "completion_date": "2014-04",
      "has_results": false,
      "last_update_posted_date": "2014-03-24",
      "last_synced_at": "2026-09-21T20:23:12.206Z",
      "location_count": 1,
      "location_summary": "Springfield, Massachusetts",
      "locations": [
        {
          "city": "Springfield",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01594541"
    },
    {
      "nct_id": "NCT03224754",
      "title": "Atypia of Undetermined Significance (AUS) / Follicular Lesion of Undetermined Significance (FLUS)",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Diagnoses Disease"
      ],
      "interventions": [
        {
          "name": "Determination of risk of malignancy of these thyroid lesions",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Mississippi Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 0,
      "start_date": "2017-07-18",
      "completion_date": "2018-05-02",
      "has_results": false,
      "last_update_posted_date": "2018-05-11",
      "last_synced_at": "2026-09-21T20:23:12.206Z",
      "location_count": 1,
      "location_summary": "Jackson, Mississippi",
      "locations": [
        {
          "city": "Jackson",
          "state": "Mississippi"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03224754"
    },
    {
      "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": "2026-09-21T20:23:12.206Z",
      "location_count": 1,
      "location_summary": "Louisville, Kentucky",
      "locations": [
        {
          "city": "Louisville",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02061748"
    },
    {
      "nct_id": "NCT03093415",
      "title": "Hepatitis C Treatment in PWIDs: MAT or Syringe Exchange Assisted-therapy vs Standard of Care",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hepatitis C",
        "Substance Use Disorders",
        "Substance Abuse, Intravenous"
      ],
      "interventions": [
        {
          "name": "elbasvir-grazoprevir (50 mg/100 mg)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Oregon Health and Science University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2017-05-30",
      "completion_date": "2019-06-06",
      "has_results": true,
      "last_update_posted_date": "2020-11-12",
      "last_synced_at": "2026-09-21T20:23:12.206Z",
      "location_count": 2,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        },
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03093415"
    },
    {
      "nct_id": "NCT01675674",
      "title": "Study to Detect Unrecognized Mucopolysaccharidosis in Children Visiting Rheumatology, Hand or Skeletal Dysplasia Clinics",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Mucopolysaccharidoses",
        "Mucopolysaccharidosis I",
        "Mucopolysaccharidosis II",
        "Mucopolysaccharidosis IV",
        "Mucopolysaccharidosis VI"
      ],
      "interventions": [
        {
          "name": "Dried blood spot test for MPS",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "National MPS Society",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "6 Months to 18 Years"
      },
      "enrollment_count": 3000,
      "start_date": "2011-09",
      "completion_date": "2014-03",
      "has_results": false,
      "last_update_posted_date": "2013-05-24",
      "last_synced_at": "2026-09-21T20:23:12.206Z",
      "location_count": 2,
      "location_summary": "New Brunswick, New Jersey • New York, New York",
      "locations": [
        {
          "city": "New Brunswick",
          "state": "New Jersey"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01675674"
    },
    {
      "nct_id": "NCT00954473",
      "title": "Study of Blood Samples From Patients With Osteosarcoma",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Localized Osteosarcoma",
        "Metastatic Osteosarcoma",
        "Recurrent Osteosarcoma"
      ],
      "interventions": [
        {
          "name": "laboratory biomarker analysis",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Children's Oncology Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 1000,
      "start_date": "2009-01",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2016-05-19",
      "last_synced_at": "2026-09-21T20:23:12.206Z",
      "location_count": 1,
      "location_summary": "Arcadia, California",
      "locations": [
        {
          "city": "Arcadia",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00954473"
    },
    {
      "nct_id": "NCT07046767",
      "title": "CAMP RWE Trial: Amnion Grafts for Healing Hard-to-Heal Ulcers in RW Populations",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Diabetic Foot Ulcer (DFU)",
        "Venous Leg Ulcer",
        "Wound; Foot"
      ],
      "interventions": [
        {
          "name": "IP1: BioLab Membrane Wrap Lite IP2: BioLab Tri-Membrane Wrap",
          "type": "OTHER"
        },
        {
          "name": "IP2: BioLab Tri-Membrane Wrap",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Capsicure, LLC",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 165,
      "start_date": "2025-10-01",
      "completion_date": "2026-07-20",
      "has_results": false,
      "last_update_posted_date": "2025-10-22",
      "last_synced_at": "2026-09-21T20:23:12.206Z",
      "location_count": 7,
      "location_summary": "Oxnard, California • Coral Gables, Florida • Miami, Florida + 4 more",
      "locations": [
        {
          "city": "Oxnard",
          "state": "California"
        },
        {
          "city": "Coral Gables",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07046767"
    },
    {
      "nct_id": "NCT01444144",
      "title": "Ankle Fracture Treatment in the Elderly",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Ankle Fracture"
      ],
      "interventions": [
        {
          "name": "Fracture union",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "55 Years to 85 Years"
      },
      "enrollment_count": 118,
      "start_date": "2011-03",
      "completion_date": "2011-04-03",
      "has_results": false,
      "last_update_posted_date": "2017-10-03",
      "last_synced_at": "2026-09-21T20:23:12.206Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01444144"
    },
    {
      "nct_id": "NCT04503044",
      "title": "ILAs in CT Lung Cancer Screening Population",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Interstitial Lung Disease",
        "IPF"
      ],
      "interventions": [
        {
          "name": "Retrospective observational study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Lahey Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 1703,
      "start_date": "2021-01-30",
      "completion_date": "2021-06-30",
      "has_results": false,
      "last_update_posted_date": "2021-08-03",
      "last_synced_at": "2026-09-21T20:23:12.206Z",
      "location_count": 1,
      "location_summary": "Burlington, Massachusetts",
      "locations": [
        {
          "city": "Burlington",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04503044"
    },
    {
      "nct_id": "NCT04881448",
      "title": "A Study to Examine Past Estimated Glomerular Filtration Rate (eGFR) Slope as a Risk Marker for Rapid Kidney Function Decline in People With Chronic Kidney Disease",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Chronic Kidney Disease"
      ],
      "interventions": [
        {
          "name": "collection of serum/capillary creatinine values",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Boehringer Ingelheim",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 223,
      "start_date": "2021-09-16",
      "completion_date": "2022-07-15",
      "has_results": true,
      "last_update_posted_date": "2023-08-04",
      "last_synced_at": "2026-09-21T20:23:12.206Z",
      "location_count": 19,
      "location_summary": "Huntsville, Alabama • Victorville, California • Bloomfield, Connecticut + 14 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Victorville",
          "state": "California"
        },
        {
          "city": "Victorville",
          "state": "California"
        },
        {
          "city": "Bloomfield",
          "state": "Connecticut"
        },
        {
          "city": "Middlebury",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04881448"
    }
  ]
}