{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Retrospective+Studies&page=2",
    "query": {
      "condition": "Retrospective Studies",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Retrospective+Studies&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-05-22T09:45:51.233Z",
  "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": "NCT05536453",
      "title": "Retro Comparison of Subsidence Following Interbody Devices in Lumbar Spine",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Degenerative Disc Disease (DDD)"
      ],
      "interventions": [
        {
          "name": "Lumbar Interbody Fusion Devices",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Spine and Scoliosis Research Associates",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "110 Years",
        "sex": "ALL",
        "summary": "18 Years to 110 Years"
      },
      "enrollment_count": 465,
      "start_date": "2022-08-16",
      "completion_date": "2025-07-16",
      "has_results": false,
      "last_update_posted_date": "2025-10-20",
      "last_synced_at": "2026-05-22T09:45:51.233Z",
      "location_count": 4,
      "location_summary": "San Francisco, California • New York, New York • Charlotte, North Carolina + 1 more",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Charlotte",
          "state": "North Carolina"
        },
        {
          "city": "Bensalem",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05536453"
    },
    {
      "nct_id": "NCT05736848",
      "title": "A Retrospective Assessment of OviTex PRS (OviTex)",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Reconstructive Surgical Procedures"
      ],
      "interventions": [
        {
          "name": "OviTex® PRS",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Tela Bio Inc",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 75 Years · Female only"
      },
      "enrollment_count": 200,
      "start_date": "2022-09-27",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2025-08-15",
      "last_synced_at": "2026-05-22T09:45:51.233Z",
      "location_count": 11,
      "location_summary": "Naples, Florida • South Miami, Florida • Alpharetta, Georgia + 8 more",
      "locations": [
        {
          "city": "Naples",
          "state": "Florida"
        },
        {
          "city": "South Miami",
          "state": "Florida"
        },
        {
          "city": "Alpharetta",
          "state": "Georgia"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Rochester Hills",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05736848"
    },
    {
      "nct_id": "NCT02210429",
      "title": "Supraclavicular Blocks for Post-Operative Pain Control in Supracondylar Fracture Fixation, a Retrospective Analysis of Single Shot Catheter Techniques",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Acute Pain",
        "Pain, Postoperative"
      ],
      "interventions": [
        {
          "name": "Elbow Fracture Fixation",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Ann & Robert H Lurie Children's Hospital of Chicago",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "Up to 17 Years"
      },
      "enrollment_count": 200,
      "start_date": "2009-01",
      "completion_date": "2015-11",
      "has_results": false,
      "last_update_posted_date": "2015-07-29",
      "last_synced_at": "2026-05-22T09:45:51.233Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02210429"
    },
    {
      "nct_id": "NCT00195221",
      "title": "Study to Describe the Allergic Reactions to Factor IX in Patients With Hemophilia B",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hemophilia B",
        "Allergic Reactions"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Wyeth is now a wholly owned subsidiary of Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 166,
      "start_date": "2005-02",
      "completion_date": "2007-11",
      "has_results": false,
      "last_update_posted_date": "2007-12-05",
      "last_synced_at": "2026-05-22T09:45:51.233Z",
      "location_count": 15,
      "location_summary": "Phoenix, Arizona • Orange, California • Atlanta, Georgia + 12 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Boise",
          "state": "Idaho"
        },
        {
          "city": "Peoria",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00195221"
    },
    {
      "nct_id": "NCT03999814",
      "title": "Natural History of Infantile Neuroaxonal Dystrophy",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Infantile Neuroaxonal Dystrophy",
        "INAD"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Biojiva LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Months",
        "maximum_age": "10 Years",
        "sex": "ALL",
        "summary": "18 Months to 10 Years"
      },
      "enrollment_count": 13,
      "start_date": "2018-07-30",
      "completion_date": "2020-02-27",
      "has_results": false,
      "last_update_posted_date": "2020-06-29",
      "last_synced_at": "2026-05-22T09:45:51.233Z",
      "location_count": 1,
      "location_summary": "Los Altos, California",
      "locations": [
        {
          "city": "Los Altos",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03999814"
    },
    {
      "nct_id": "NCT04795206",
      "title": "Natural Disease Progression in Participants With Choroideremia",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Choroideremia"
      ],
      "interventions": [
        {
          "name": "No Intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Biogen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "10 Years and older"
      },
      "enrollment_count": 1178,
      "start_date": "2020-08-26",
      "completion_date": "2021-08-10",
      "has_results": false,
      "last_update_posted_date": "2021-09-08",
      "last_synced_at": "2026-05-22T09:45:51.233Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04795206"
    },
    {
      "nct_id": "NCT05440409",
      "title": "CAR-Multicenter Analysis (CAR-MA): Retrospective Study to Characterize CAR T-cell Outcomes and Related Toxicities in Children and Young Adults With B-ALL",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Leukemia, Acute Lymphoblastic",
        "Lymphoblastic Leukemia, Acute, Childhood"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "25 Years",
        "sex": "ALL",
        "summary": "3 Years to 25 Years"
      },
      "enrollment_count": 57,
      "start_date": "2021-10-14",
      "completion_date": "2024-10-29",
      "has_results": false,
      "last_update_posted_date": "2025-06-26",
      "last_synced_at": "2026-05-22T09:45:51.233Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05440409"
    },
    {
      "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": "2026-05-22T09:45:51.233Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05244096"
    },
    {
      "nct_id": "NCT07357441",
      "title": "A Study to Evaluate the Demographics and Treatment Patterns of Myelofibrosis Patients Treated With Ruxolitinib in Turkey",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Myelofibrosis"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Novartis Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 355,
      "start_date": "2022-04-07",
      "completion_date": "2023-06-28",
      "has_results": false,
      "last_update_posted_date": "2026-01-22",
      "last_synced_at": "2026-05-22T09:45:51.233Z",
      "location_count": 1,
      "location_summary": "East Hanover, New Jersey",
      "locations": [
        {
          "city": "East Hanover",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07357441"
    },
    {
      "nct_id": "NCT00478686",
      "title": "Association of Dihydropyrimidine Dehydrogenase (DPYD) Variants With Toxicity Related to Capecitabine",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Phlebotomy",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 102,
      "start_date": "2007-05-23",
      "completion_date": "2017-05-02",
      "has_results": false,
      "last_update_posted_date": "2017-05-08",
      "last_synced_at": "2026-05-22T09:45:51.233Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00478686"
    }
  ]
}