{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+Cohort&page=2",
    "query": {
      "intervention": "Observational Cohort",
      "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?intervention=Observational+Cohort&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-23T12:14:53.153Z",
  "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": "NCT02831439",
      "title": "A Statewide Intervention to Reduce Use of Unproven or Ineffective Breast Cancer Care",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Basic public reporting",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Enhanced intervention",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Control group - observational",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Medical College of Wisconsin",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 400415,
      "start_date": "2014-09",
      "completion_date": "2019-12",
      "has_results": false,
      "last_update_posted_date": "2020-01-22",
      "last_synced_at": "2026-09-23T12:14:53.153Z",
      "location_count": 1,
      "location_summary": "Milwaukee, Wisconsin",
      "locations": [
        {
          "city": "Milwaukee",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02831439"
    },
    {
      "nct_id": "NCT03378219",
      "title": "An Observational Study on Sarilumab-exposed Pregnancies",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Rheumatoid Arthritis -Exposure During Pregnancy"
      ],
      "interventions": [
        {
          "name": "Sarilumab SAR153191 (REGN88)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Sanofi",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "Female only"
      },
      "enrollment_count": 113,
      "start_date": "2018-05-18",
      "completion_date": "2024-12-06",
      "has_results": false,
      "last_update_posted_date": "2025-01-17",
      "last_synced_at": "2026-09-23T12:14:53.153Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03378219"
    },
    {
      "nct_id": "NCT04167137",
      "title": "Safety and Tolerability of SYNB1891 Injection Alone or in Combination With Atezolizumab in Adult Participants",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Metastatic Solid Neoplasm",
        "Lymphoma"
      ],
      "interventions": [
        {
          "name": "SYNB1891",
          "type": "DRUG"
        },
        {
          "name": "Atezolizumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Synlogic",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 32,
      "start_date": "2019-12-12",
      "completion_date": "2021-12-09",
      "has_results": true,
      "last_update_posted_date": "2024-05-03",
      "last_synced_at": "2026-09-23T12:14:53.153Z",
      "location_count": 6,
      "location_summary": "Aurora, Colorado • Hackensack, New Jersey • Columbus, Ohio + 3 more",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Hackensack",
          "state": "New Jersey"
        },
        {
          "city": "Columbus",
          "state": "Ohio"
        },
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        },
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04167137"
    },
    {
      "nct_id": "NCT01931839",
      "title": "A Phase 3 Rollover Study of Lumacaftor in Combination With Ivacaftor in Subjects 12 Years and Older With Cystic Fibrosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Cystic Fibrosis, Homozygous or Heterozygous for the F508del-CFTR Mutation"
      ],
      "interventions": [
        {
          "name": "Lumacaftor Plus Ivacaftor Combination",
          "type": "DRUG"
        },
        {
          "name": "Ivacaftor",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Vertex Pharmaceuticals Incorporated",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 1164,
      "start_date": "2013-10",
      "completion_date": "2016-04",
      "has_results": true,
      "last_update_posted_date": "2017-05-12",
      "last_synced_at": "2026-09-23T12:14:53.153Z",
      "location_count": 91,
      "location_summary": "Birmingham, Alabama • Anchorage, Alaska • Tucson, Arizona + 88 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "La Jolla",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01931839"
    },
    {
      "nct_id": "NCT06013475",
      "title": "An Observational Cohort Study to Describe and Compare the Use of Darolutamide, Enzalutamide and Apalutamide and How Well These Work in Men With Non-metastatic Castration-resistant Prostate Cancer (nmCRPC) in Real World Settings",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Non-metastatic Castration-resistant Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "Apalutamide",
          "type": "DRUG"
        },
        {
          "name": "Darolutamide (BAY 1841788)",
          "type": "DRUG"
        },
        {
          "name": "Enzalutamide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 1375,
      "start_date": "2023-08-31",
      "completion_date": "2024-10-28",
      "has_results": false,
      "last_update_posted_date": "2025-06-12",
      "last_synced_at": "2026-09-23T12:14:53.153Z",
      "location_count": 1,
      "location_summary": "Whippany, New Jersey",
      "locations": [
        {
          "city": "Whippany",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06013475"
    },
    {
      "nct_id": "NCT04378777",
      "title": "Immunophenotyping Assessment in a COVID-19 Cohort",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Coronavirus Disease 2019 (COVID-19)",
        "SARS-CoV-2"
      ],
      "interventions": [
        {
          "name": "Biological sample collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Data Collection: Clinical Care Assessments",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1227,
      "start_date": "2020-05-01",
      "completion_date": "2022-04-21",
      "has_results": false,
      "last_update_posted_date": "2022-05-19",
      "last_synced_at": "2026-09-23T12:14:53.153Z",
      "location_count": 17,
      "location_summary": "Tucson, Arizona • Los Angeles, California • San Francisco, California + 14 more",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04378777"
    },
    {
      "nct_id": "NCT05349019",
      "title": "A Natural History Study of Patients With G2019S LRRK2 Parkinson's Disease",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Patients With Parkinson's Disease (PD) Caused by the p.Gly2019Ser (G2019S) Pathogenic Mutation of the Leucine-Rich Repeat Kinase 2 (LRRK2) Gene"
      ],
      "interventions": [
        {
          "name": "Observational",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Escape Bio, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 22,
      "start_date": "2022-05-02",
      "completion_date": "2022-08-05",
      "has_results": false,
      "last_update_posted_date": "2023-01-18",
      "last_synced_at": "2026-09-23T12:14:53.153Z",
      "location_count": 1,
      "location_summary": "Culver City, California",
      "locations": [
        {
          "city": "Culver City",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05349019"
    },
    {
      "nct_id": "NCT07516119",
      "title": "Predicting Pre-dementia",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Mild Cognitive Impairment (MCI)",
        "Alzheimer Dementia (AD)",
        "Alzheimer Disease (AD)",
        "APOE-4 Positive"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Prevention Research Consortium Corp.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "55 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2026-11-15",
      "completion_date": "2029-04-15",
      "has_results": false,
      "last_update_posted_date": "2026-09-22",
      "last_synced_at": "2026-09-23T12:14:53.153Z",
      "location_count": 1,
      "location_summary": "San Diego, California",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07516119"
    },
    {
      "nct_id": "NCT05753748",
      "title": "Surveillance vs. Endoscopic Therapy for Barrett's Esophagus With Low-grade Dysplasia",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Barretts Esophagus With Dysplasia",
        "Barrett Esophagus",
        "Esophageal Adenocarcinoma"
      ],
      "interventions": [
        {
          "name": "Endoscopic Eradication Therapy",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "89 Years",
        "sex": "ALL",
        "summary": "18 Years to 89 Years"
      },
      "enrollment_count": 680,
      "start_date": "2023-01-24",
      "completion_date": "2029-04-30",
      "has_results": false,
      "last_update_posted_date": "2026-09-11",
      "last_synced_at": "2026-09-23T12:14:53.153Z",
      "location_count": 30,
      "location_summary": "Birmingham, Alabama • Scottsdale, Arizona • Los Angeles, California + 25 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "San Jose",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05753748"
    },
    {
      "nct_id": "NCT07654426",
      "title": "The CARDIOPROTECT Trial",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Diffuse Large B-cell Lymphoma (DLBCL)",
        "Cardiotoxicity",
        "Lymphoma"
      ],
      "interventions": [
        {
          "name": "Dexrazoxane",
          "type": "DRUG"
        },
        {
          "name": "Dexrazoxane placebo",
          "type": "DRUG"
        },
        {
          "name": "Doxorubicin",
          "type": "DRUG"
        },
        {
          "name": "Liposomal Doxorubicin",
          "type": "DRUG"
        },
        {
          "name": "Cyclophosphamide",
          "type": "DRUG"
        },
        {
          "name": "Vincristine",
          "type": "DRUG"
        },
        {
          "name": "Prednisone",
          "type": "DRUG"
        },
        {
          "name": "Rituximab",
          "type": "DRUG"
        },
        {
          "name": "Polatuzumab Vedotin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Beth Israel Deaconess 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": 60,
      "start_date": "2026-08-31",
      "completion_date": "2035-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-07-27",
      "last_synced_at": "2026-09-23T12:14:53.153Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07654426"
    }
  ]
}