{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observation+only&page=25",
    "query": {
      "intervention": "Observation only",
      "page": 25
    },
    "page_size": 10
  },
  "pagination": {
    "page": 25,
    "page_size": 10,
    "total_count": 878,
    "total_pages": 88,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observation+only&page=26&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observation+only&page=24&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-31T17:05:13.774Z",
  "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": "NCT00002649",
      "title": "Interleukin-2 or Observation Following Radiation Therapy, Combination Chemotherapy, and Peripheral Stem Cell Transplantation in Treating Patients With Recurrent Non-Hodgkin's Lymphoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Recurrent Adult Burkitt Lymphoma",
        "Recurrent Adult Diffuse Large Cell Lymphoma",
        "Recurrent Adult Diffuse Mixed Cell Lymphoma",
        "Recurrent Adult Diffuse Small Cleaved Cell Lymphoma",
        "Recurrent Adult Immunoblastic Large Cell Lymphoma",
        "Recurrent Grade 1 Follicular Lymphoma",
        "Recurrent Grade 2 Follicular Lymphoma",
        "Recurrent Grade 3 Follicular Lymphoma"
      ],
      "interventions": [
        {
          "name": "aldesleukin",
          "type": "BIOLOGICAL"
        },
        {
          "name": "filgrastim",
          "type": "BIOLOGICAL"
        },
        {
          "name": "cyclophosphamide",
          "type": "DRUG"
        },
        {
          "name": "etoposide",
          "type": "DRUG"
        },
        {
          "name": "radiation therapy",
          "type": "RADIATION"
        },
        {
          "name": "peripheral blood stem cell transplantation",
          "type": "PROCEDURE"
        },
        {
          "name": "bone marrow ablation with stem cell support",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG",
        "RADIATION",
        "PROCEDURE"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "16 Years to 60 Years"
      },
      "enrollment_count": 206,
      "start_date": "1995-05",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2013-02-28",
      "last_synced_at": "2026-10-31T17:05:13.774Z",
      "location_count": 1,
      "location_summary": "San Antonio, Texas",
      "locations": [
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00002649"
    },
    {
      "nct_id": "NCT05981716",
      "title": "Young Breast Cancer Survivors Study",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "No intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of South Carolina",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 60 Years · Female only"
      },
      "enrollment_count": 384,
      "start_date": "2023-01-10",
      "completion_date": "2023-12-31",
      "has_results": false,
      "last_update_posted_date": "2023-08-14",
      "last_synced_at": "2026-10-31T17:05:13.774Z",
      "location_count": 1,
      "location_summary": "Columbia, South Carolina",
      "locations": [
        {
          "city": "Columbia",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05981716"
    },
    {
      "nct_id": "NCT04517149",
      "title": "4D-125 in Patients With X-Linked Retinitis Pigmentosa (XLRP)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "X-Linked Retinitis Pigmentosa"
      ],
      "interventions": [
        {
          "name": "4D-125 IVT Injection",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Observational",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "4D Molecular Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "12 Years and older · Male only"
      },
      "enrollment_count": 21,
      "start_date": "2020-06-09",
      "completion_date": "2029-05",
      "has_results": false,
      "last_update_posted_date": "2025-03-21",
      "last_synced_at": "2026-10-31T17:05:13.774Z",
      "location_count": 8,
      "location_summary": "Aurora, Colorado • Gainesville, Florida • Ann Arbor, Michigan + 5 more",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04517149"
    },
    {
      "nct_id": "NCT04642404",
      "title": "CBD for Dental Pain",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Odontalgia",
        "Toothache"
      ],
      "interventions": [
        {
          "name": "Epidiolex 100 mg/mL Oral Solution",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "The University of Texas Health Science Center at San Antonio",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 64,
      "start_date": "2021-03-01",
      "completion_date": "2023-03-13",
      "has_results": true,
      "last_update_posted_date": "2024-05-09",
      "last_synced_at": "2026-10-31T17:05:13.774Z",
      "location_count": 1,
      "location_summary": "San Antonio, Texas",
      "locations": [
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04642404"
    },
    {
      "nct_id": "NCT00891592",
      "title": "Umbilical Cord Blood Transplant for Hematological Malignancies",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "CML",
        "AML",
        "MDS",
        "ALL",
        "NHL",
        "Multiple Myeloma",
        "Hodgkin's Disease"
      ],
      "interventions": [
        {
          "name": "Ex Vivo CD3/CD28 costimulated Umbilical Cord Blood T cells",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Observation Arm",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "21 Years to 50 Years"
      },
      "enrollment_count": 5,
      "start_date": "2009-01",
      "completion_date": "2016-05",
      "has_results": false,
      "last_update_posted_date": "2016-08-19",
      "last_synced_at": "2026-10-31T17:05:13.774Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00891592"
    },
    {
      "nct_id": "NCT05632575",
      "title": "The Virtual Promotoras Study: eHealth Intervention to Promote Sexual Health Among Young Latina Women in the US South",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Virtual Promotoras Program",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Alabama, Tuscaloosa",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "21 Years",
        "sex": "FEMALE",
        "summary": "16 Years to 21 Years · Female only"
      },
      "enrollment_count": 25,
      "start_date": "2024-11-11",
      "completion_date": "2025-08-30",
      "has_results": false,
      "last_update_posted_date": "2026-01-06",
      "last_synced_at": "2026-10-31T17:05:13.774Z",
      "location_count": 1,
      "location_summary": "Tuscaloosa, Alabama",
      "locations": [
        {
          "city": "Tuscaloosa",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05632575"
    },
    {
      "nct_id": "NCT02953704",
      "title": "Myelofibrosis and Essential Thrombocythemia Observational Study (MOST)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "MPN (Myeloproliferative Neoplasms)"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Incyte Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1469,
      "start_date": "2016-12-31",
      "completion_date": "2022-03-29",
      "has_results": false,
      "last_update_posted_date": "2022-05-13",
      "last_synced_at": "2026-10-31T17:05:13.774Z",
      "location_count": 114,
      "location_summary": "Huntsville, Alabama • Tempe, Arizona • Tucson, Arizona + 111 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Tempe",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Berkeley",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02953704"
    },
    {
      "nct_id": "NCT04720235",
      "title": "A Follow On Community Testing Study To Evaluate The Performance of the Lucira COVID-19 All-In-One Test Kit",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Covid19",
        "Corona Virus Infection"
      ],
      "interventions": [
        {
          "name": "Lucira COVID-19 All-In-One test kit",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Lucira Health Inc",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "14 Years to 75 Years"
      },
      "enrollment_count": 304,
      "start_date": "2020-12-09",
      "completion_date": "2021-03-30",
      "has_results": false,
      "last_update_posted_date": "2021-04-12",
      "last_synced_at": "2026-10-31T17:05:13.774Z",
      "location_count": 1,
      "location_summary": "Los Gatos, California",
      "locations": [
        {
          "city": "Los Gatos",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04720235"
    },
    {
      "nct_id": "NCT02144935",
      "title": "Collaborative Assessment of Pediatric Transverse Myelitis: Understand, Reveal, Educate or CAPTURE Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Myelitis, Transverse",
        "Flaccid Paraplegia, Complete, Acute",
        "Flaccid Paraplegia, Incomplete, Acute"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Texas Southwestern Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "Up to 17 Years"
      },
      "enrollment_count": 106,
      "start_date": "2014-05",
      "completion_date": "2022-08-19",
      "has_results": false,
      "last_update_posted_date": "2022-08-23",
      "last_synced_at": "2026-10-31T17:05:13.774Z",
      "location_count": 1,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02144935"
    },
    {
      "nct_id": "NCT00053352",
      "title": "Surgery and Combination Chemotherapy in Treating Children With Extracranial Germ Cell Tumors",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Childhood Embryonal Tumor",
        "Childhood Extracranial Germ Cell Tumor",
        "Childhood Extragonadal Germ Cell Tumor",
        "Childhood Malignant Ovarian Germ Cell Tumor",
        "Childhood Malignant Testicular Germ Cell Tumor",
        "Childhood Teratoma",
        "Ovarian Embryonal Carcinoma",
        "Ovarian Yolk Sac Tumor",
        "Stage II Malignant Testicular Germ Cell Tumor",
        "Stage IIA Ovarian Germ Cell Tumor",
        "Stage IIB Ovarian Germ Cell Tumor",
        "Stage IIC Ovarian Germ Cell Tumor",
        "Stage III Malignant Testicular Germ Cell Tumor",
        "Stage IIIA Ovarian Germ Cell Tumor",
        "Stage IIIB Ovarian Germ Cell Tumor",
        "Stage IIIC Ovarian Germ Cell Tumor",
        "Testicular Choriocarcinoma and Yolk Sac Tumor",
        "Testicular Embryonal Carcinoma"
      ],
      "interventions": [
        {
          "name": "conventional surgery",
          "type": "PROCEDURE"
        },
        {
          "name": "cisplatin",
          "type": "DRUG"
        },
        {
          "name": "etoposide",
          "type": "DRUG"
        },
        {
          "name": "bleomycin sulfate",
          "type": "BIOLOGICAL"
        },
        {
          "name": "laboratory biomarker analysis",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG",
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "Children's Oncology Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "Up to 21 Years"
      },
      "enrollment_count": 302,
      "start_date": "2003-11-03",
      "completion_date": "2021-06-30",
      "has_results": true,
      "last_update_posted_date": "2021-07-13",
      "last_synced_at": "2026-10-31T17:05:13.774Z",
      "location_count": 112,
      "location_summary": "Birmingham, Alabama • Phoenix, Arizona • Little Rock, Arkansas + 98 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Downey",
          "state": "California"
        },
        {
          "city": "Loma Linda",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00053352"
    }
  ]
}