{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+study&page=12",
    "query": {
      "intervention": "Retrospective study",
      "page": 12
    },
    "page_size": 10
  },
  "pagination": {
    "page": 12,
    "page_size": 10,
    "total_count": 1214,
    "total_pages": 122,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+study&page=13&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+study&page=11&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-30T08:07:56.031Z",
  "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": "NCT03112694",
      "title": "Switching From Octreotide to Lanreotide - A Look Back at Patients With Neuroendocrine Tumors",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Neuroendocrine Tumors"
      ],
      "interventions": [
        {
          "name": "Data collection",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Ipsen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 93,
      "start_date": "2017-04-04",
      "completion_date": "2017-11-02",
      "has_results": false,
      "last_update_posted_date": "2020-06-02",
      "last_synced_at": "2026-10-30T08:07:56.031Z",
      "location_count": 8,
      "location_summary": "Tampa, Florida • Wichita, Kansas • New Orleans, Louisiana + 5 more",
      "locations": [
        {
          "city": "Tampa",
          "state": "Florida"
        },
        {
          "city": "Wichita",
          "state": "Kansas"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03112694"
    },
    {
      "nct_id": "NCT07211919",
      "title": "Accelerated Transcranial Magnetic Stimulation Intervention for Post-Concussion Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Post Concussive Syndrome, Chronic",
        "Post Concussion Symptoms",
        "Post Concussive Syndrome",
        "Post Concussion Syndrome",
        "Anxiety Disorder Not Otherwise Specified"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Cognitive FX",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "16 Years to 75 Years"
      },
      "enrollment_count": 11,
      "start_date": "2025-05-01",
      "completion_date": "2025-07-31",
      "has_results": false,
      "last_update_posted_date": "2025-10-10",
      "last_synced_at": "2026-10-30T08:07:56.031Z",
      "location_count": 1,
      "location_summary": "Provo, Utah",
      "locations": [
        {
          "city": "Provo",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07211919"
    },
    {
      "nct_id": "NCT04928781",
      "title": "Smoking Cessation Study",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Smoking Cessation"
      ],
      "interventions": [
        {
          "name": "Smoking Cessation Counseling",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Dartmouth-Hitchcock Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2022-06-28",
      "completion_date": "2023-06-01",
      "has_results": false,
      "last_update_posted_date": "2023-02-16",
      "last_synced_at": "2026-10-30T08:07:56.031Z",
      "location_count": 1,
      "location_summary": "Lebanon, New Hampshire",
      "locations": [
        {
          "city": "Lebanon",
          "state": "New Hampshire"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04928781"
    },
    {
      "nct_id": "NCT03059745",
      "title": "Use of Robotics for Cholecystectomy; Retrospective Review of Outcomes, Set Up and Learning Curves",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cholecystitis",
        "Cholelithiasis"
      ],
      "interventions": [
        {
          "name": "Cholecystectomy",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "University of California, Davis",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 200,
      "start_date": "2004-06",
      "completion_date": "2017-03-03",
      "has_results": false,
      "last_update_posted_date": "2019-06-11",
      "last_synced_at": "2026-10-30T08:07:56.031Z",
      "location_count": 2,
      "location_summary": "Sacramento, California",
      "locations": [
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03059745"
    },
    {
      "nct_id": "NCT06271369",
      "title": "Real-World HRU and Costs in DLBCL Pts With Tisa-cel and Axi-cel, a Medicare Study.",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Diffuse Large B-cell Lymphoma"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Novartis Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 613,
      "start_date": "2022-08-11",
      "completion_date": "2023-02-15",
      "has_results": false,
      "last_update_posted_date": "2024-02-21",
      "last_synced_at": "2026-10-30T08:07:56.031Z",
      "location_count": 1,
      "location_summary": "East Hanover, New Jersey",
      "locations": [
        {
          "city": "East Hanover",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06271369"
    },
    {
      "nct_id": "NCT02662153",
      "title": "Incidence and Predictors of Opioid Overdose and Death Among Long-Term Users of Opioid Analgesics",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Opioid Overdose"
      ],
      "interventions": [
        {
          "name": "Observation only",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Member Companies of the Opioid PMR Consortium",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "79 Years",
        "sex": "ALL",
        "summary": "18 Years to 79 Years"
      },
      "enrollment_count": 808455,
      "start_date": "2019-05-02",
      "completion_date": "2021-06-30",
      "has_results": false,
      "last_update_posted_date": "2022-07-14",
      "last_synced_at": "2026-10-30T08:07:56.031Z",
      "location_count": 4,
      "location_summary": "Wilmington, Delaware • Boston, Massachusetts • Portland, Oregon + 1 more",
      "locations": [
        {
          "city": "Wilmington",
          "state": "Delaware"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Portland",
          "state": "Oregon"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02662153"
    },
    {
      "nct_id": "NCT04860453",
      "title": "Genomic Analysis of Families With a History of Discordant Cancers",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Discordant Cancers"
      ],
      "interventions": [
        {
          "name": "WES via Illumina NextSeq 550 sequencing system",
          "type": "GENETIC"
        },
        {
          "name": "Blood Draw",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Skin biopsy",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Saliva Sample",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "GENETIC",
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Case Comprehensive Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "18 Years to 100 Years"
      },
      "enrollment_count": 150,
      "start_date": "2020-11-17",
      "completion_date": "2028-07-01",
      "has_results": false,
      "last_update_posted_date": "2025-09-03",
      "last_synced_at": "2026-10-30T08:07:56.031Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04860453"
    },
    {
      "nct_id": "NCT02085551",
      "title": "Case Review of the Penumbra and Indigo Systems for Mechanical Thrombectomy in the Periphery",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Peripheral Arterial Occlusion or Emboli"
      ],
      "interventions": [
        {
          "name": "Mechanical Thrombectomy by the Indigo System",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Penumbra Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 85,
      "start_date": "2014-03",
      "completion_date": "2015-09",
      "has_results": true,
      "last_update_posted_date": "2020-06-22",
      "last_synced_at": "2026-10-30T08:07:56.031Z",
      "location_count": 5,
      "location_summary": "San Diego, California • Miami, Florida • Chicago, Illinois + 2 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Charlotte",
          "state": "North Carolina"
        },
        {
          "city": "Fargo",
          "state": "North Dakota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02085551"
    },
    {
      "nct_id": "NCT04979000",
      "title": "HPV in Sinonasal Ca: Retrospective Analysis Association of Human Papilloma Virus (HPV) Serology and Behavioral Risk Factors",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sinonasal Carcinoma",
        "HPV-Related Squamous Cell Carcinoma"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 49,
      "start_date": "2021-08-03",
      "completion_date": "2025-05-28",
      "has_results": false,
      "last_update_posted_date": "2025-09-22",
      "last_synced_at": "2026-10-30T08:07:56.031Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04979000"
    },
    {
      "nct_id": "NCT02402257",
      "title": "Central Venous Catheter Insertion Train the Trainer",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "CVC Train the Trainer",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "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": 226,
      "start_date": "2014-01",
      "completion_date": "2018-12",
      "has_results": false,
      "last_update_posted_date": "2019-09-06",
      "last_synced_at": "2026-10-30T08:07:56.031Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02402257"
    }
  ]
}