{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=No+intervention%2C+observational+retrospective+study&page=2",
    "query": {
      "intervention": "No intervention, observational retrospective study",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 34,
    "total_pages": 4,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=No+intervention%2C+observational+retrospective+study&page=3&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=No+intervention%2C+observational+retrospective+study&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-02T05:54:39.247Z",
  "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": "NCT07250815",
      "title": "A Study on Infections in Adults With Ulcerative Colitis/Crohn's Disease",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Ulcerative Colitis",
        "Crohn's Disease"
      ],
      "interventions": [
        {
          "name": "No intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Takeda",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 23900,
      "start_date": "2026-09-21",
      "completion_date": "2026-12-15",
      "has_results": false,
      "last_update_posted_date": "2026-08-24",
      "last_synced_at": "2026-10-02T05:54:39.247Z",
      "location_count": 1,
      "location_summary": "Cambridge, Massachusetts",
      "locations": [
        {
          "city": "Cambridge",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07250815"
    },
    {
      "nct_id": "NCT06214507",
      "title": "Danon Disease Natural History Study",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Danon Disease"
      ],
      "interventions": [
        {
          "name": "No intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Rocket Pharmaceuticals Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "8 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2023-12-20",
      "completion_date": "2030-03",
      "has_results": false,
      "last_update_posted_date": "2026-07-28",
      "last_synced_at": "2026-10-02T05:54:39.247Z",
      "location_count": 9,
      "location_summary": "Phoenix, Arizona • La Jolla, California • Aurora, Colorado + 6 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06214507"
    },
    {
      "nct_id": "NCT06644742",
      "title": "PKP2-ACM Natural History Study",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cardiomyopathies",
        "Heart Diseases",
        "Cardiovascular Diseases",
        "Genetic Diseases"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Rocket Pharmaceuticals Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 36,
      "start_date": "2026-03",
      "completion_date": "2031-04",
      "has_results": false,
      "last_update_posted_date": "2026-02-27",
      "last_synced_at": "2026-10-02T05:54:39.247Z",
      "location_count": 2,
      "location_summary": "Boston, Massachusetts • Durham, North Carolina",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06644742"
    },
    {
      "nct_id": "NCT05944133",
      "title": "Health Insurance Instability and Mortality Among Patients Receiving Bup Tx for OUD",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Opioid Use Disorder",
        "Opioid Overdose",
        "Death"
      ],
      "interventions": [
        {
          "name": "No intervention, observational retrospective study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Kaiser Permanente",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "16 Years and older"
      },
      "enrollment_count": 27257,
      "start_date": "2023-03-29",
      "completion_date": "2026-02-28",
      "has_results": false,
      "last_update_posted_date": "2024-10-17",
      "last_synced_at": "2026-10-02T05:54:39.247Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05944133"
    },
    {
      "nct_id": "NCT04113551",
      "title": "A Study of Label Compliance for Attention Deficit/Hyperactivity Disorder (ADHD) Medications in Japan",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Attention Deficit Disorder With Hyperactivity"
      ],
      "interventions": [
        {
          "name": "MPH (Concerta)",
          "type": "DRUG"
        },
        {
          "name": "MPH (Ritalin)",
          "type": "DRUG"
        },
        {
          "name": "Atomoxetine (ATO)",
          "type": "DRUG"
        },
        {
          "name": "Guanfacine (GFC)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Janssen Research & Development, LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 17418,
      "start_date": "2019-10-01",
      "completion_date": "2020-01-10",
      "has_results": false,
      "last_update_posted_date": "2025-04-27",
      "last_synced_at": "2026-10-02T05:54:39.247Z",
      "location_count": 1,
      "location_summary": "Titusville, New Jersey",
      "locations": [
        {
          "city": "Titusville",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04113551"
    },
    {
      "nct_id": "NCT04079829",
      "title": "Postoperative Respiratory Abnormalities",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Respiratory Failure",
        "Respiratory Arrest",
        "Respiratory Distress Syndrome",
        "Acute Respiratory Failure",
        "Acute Respiratory Failure With Hypoxia",
        "Acute Respiratory Failure With Hypercapnia",
        "Acute Respiratory Failure Post Surgical",
        "Acute Respiratory Failure Postprocedural",
        "Acute Respiratory Failure Following Trauma and Surgery",
        "Acute Respiratory Failure Requiring Reintubation",
        "Acute Respiratory Failure Post Traumatic",
        "Acute Respiratory Decompensation",
        "Shock",
        "Shock, Septic",
        "Shock, Cardiogenic",
        "Acute Cardiac Failure",
        "Multi Organ Failure",
        "Acute Kidney Failure"
      ],
      "interventions": [
        {
          "name": "Observational retrospective cohort to describe data validity; and Data reliability; and Completeness of the data",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Efficacy Care R&D Ltd",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 50000,
      "start_date": "2019-09-01",
      "completion_date": "2020-10",
      "has_results": false,
      "last_update_posted_date": "2020-06-24",
      "last_synced_at": "2026-10-02T05:54:39.247Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04079829"
    },
    {
      "nct_id": "NCT06172751",
      "title": "TrinetX Study of Hypereosinophilic Syndrome (HES) Without an Identifiable Non-haematological Secondary Cause",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hypereosinophilic Syndrome (HES)"
      ],
      "interventions": [
        {
          "name": "no intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 250,
      "start_date": "2023-12-15",
      "completion_date": "2024-04-26",
      "has_results": false,
      "last_update_posted_date": "2025-02-12",
      "last_synced_at": "2026-10-02T05:54:39.247Z",
      "location_count": 1,
      "location_summary": "Cambridge, Massachusetts",
      "locations": [
        {
          "city": "Cambridge",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06172751"
    },
    {
      "nct_id": "NCT04580589",
      "title": "DOAC ADRs Retrospective Study on Genetic Variations",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Drug-Related Side Effects and Adverse Reactions",
        "Treatment Failure"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Cipherome, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "18 Years to 99 Years"
      },
      "enrollment_count": 210,
      "start_date": "2021-02-01",
      "completion_date": "2022-10-31",
      "has_results": false,
      "last_update_posted_date": "2023-02-16",
      "last_synced_at": "2026-10-02T05:54:39.247Z",
      "location_count": 1,
      "location_summary": "Santa Clara, California",
      "locations": [
        {
          "city": "Santa Clara",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04580589"
    },
    {
      "nct_id": "NCT06503770",
      "title": "A Retrospective Chart Review Study of Patients With CLAD-BOS Post Lung Transplantation",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Bronchiolitis Obliterans Syndrome"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Zambon SpA",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 284,
      "start_date": "2024-06-27",
      "completion_date": "2025-04-09",
      "has_results": true,
      "last_update_posted_date": "2026-09-01",
      "last_synced_at": "2026-10-02T05:54:39.247Z",
      "location_count": 3,
      "location_summary": "Cleveland, Ohio • Columbus, Ohio • Dallas, Texas",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        },
        {
          "city": "Columbus",
          "state": "Ohio"
        },
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06503770"
    },
    {
      "nct_id": "NCT04971694",
      "title": "Impact of Steroid, Diuretic, and Fluid Use on BPD Outcomes",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "BPD - Bronchopulmonary Dysplasia"
      ],
      "interventions": [
        {
          "name": "No interventions or procedures",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Pediatrix",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 175,
      "start_date": "2021-08-30",
      "completion_date": "2024-07-06",
      "has_results": false,
      "last_update_posted_date": "2024-11-19",
      "last_synced_at": "2026-10-02T05:54:39.247Z",
      "location_count": 1,
      "location_summary": "Phoenix, Arizona",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04971694"
    }
  ]
}