{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+Phase+1",
    "query": {
      "intervention": "Observational Phase 1"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 433,
    "total_pages": 44,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+Phase+1&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-06T20:55:49.749Z",
  "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": "NCT05625529",
      "title": "ExoLuminate Study for Early Detection of Pancreatic Cancer",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pancreas Cancer",
        "Exosomes",
        "Extracellular Vesicles",
        "Pancreatic Neoplasms"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Biological Dynamics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1000,
      "start_date": "2022-12-19",
      "completion_date": "2028-01-01",
      "has_results": false,
      "last_update_posted_date": "2025-07-28",
      "last_synced_at": "2026-09-06T20:55:49.749Z",
      "location_count": 1,
      "location_summary": "San Diego, California",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05625529"
    },
    {
      "nct_id": "NCT00948649",
      "title": "Effects of Chantix on Relapse Prevention for Smoking Cessation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Nicotine Dependence"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Varenicline",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 62,
      "start_date": "2006-09",
      "completion_date": "2007-09",
      "has_results": false,
      "last_update_posted_date": "2010-08-17",
      "last_synced_at": "2026-09-06T20:55:49.749Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00948649"
    },
    {
      "nct_id": "NCT03076710",
      "title": "Post-Operative Pain Management Following Spine Surgery",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pain Management",
        "Analgesia",
        "Anesthetic"
      ],
      "interventions": [
        {
          "name": "Opioids delivered through PCA",
          "type": "DRUG"
        },
        {
          "name": "EXPAREL® infiltration",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Miami",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 0,
      "start_date": "2017-07-31",
      "completion_date": "2022-03",
      "has_results": false,
      "last_update_posted_date": "2020-07-02",
      "last_synced_at": "2026-09-06T20:55:49.749Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03076710"
    },
    {
      "nct_id": "NCT03875079",
      "title": "A Study to Evaluate Safety and Therapeutic Activity of RO6874281 in Combination with Pembrolizumab, in Participants with Advanced or Metastatic Melanoma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Metastatic Melanoma"
      ],
      "interventions": [
        {
          "name": "RO6874281",
          "type": "DRUG"
        },
        {
          "name": "Pembrolizumab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hoffmann-La Roche",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 83,
      "start_date": "2019-06-24",
      "completion_date": "2022-07-14",
      "has_results": false,
      "last_update_posted_date": "2024-10-03",
      "last_synced_at": "2026-09-06T20:55:49.749Z",
      "location_count": 4,
      "location_summary": "New Haven, Connecticut • Iowa City, Iowa • Boston, Massachusetts",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        },
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03875079"
    },
    {
      "nct_id": "NCT00670046",
      "title": "Valproic Acid in Treating Patients With Progressive, Non-Metastatic Prostate Cancer",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "valproic acid",
          "type": "DRUG"
        },
        {
          "name": "standard of care follow-up",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "MALE",
        "summary": "18 Years to 85 Years · Male only"
      },
      "enrollment_count": 15,
      "start_date": "2008-05",
      "completion_date": "2012-07",
      "has_results": true,
      "last_update_posted_date": "2018-09-28",
      "last_synced_at": "2026-09-06T20:55:49.749Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00670046"
    },
    {
      "nct_id": "NCT05333874",
      "title": "CIPHER Study: Pilot Study to Study the Role of ctDNA in Triple Negative and HER2 Positive Early Stage",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Breast Cancer, Early-Onset"
      ],
      "interventions": [
        {
          "name": "Neoadjuvant chemotherapy administered before surgical extraction of a tumor",
          "type": "DRUG"
        },
        {
          "name": "Observational",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Rutgers, The State University of New Jersey",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 34,
      "start_date": "2022-04-06",
      "completion_date": "2027-11-28",
      "has_results": false,
      "last_update_posted_date": "2026-02-09",
      "last_synced_at": "2026-09-06T20:55:49.749Z",
      "location_count": 12,
      "location_summary": "Elizabeth, New Jersey • Hamilton, New Jersey • Jersey City, New Jersey + 7 more",
      "locations": [
        {
          "city": "Elizabeth",
          "state": "New Jersey"
        },
        {
          "city": "Hamilton",
          "state": "New Jersey"
        },
        {
          "city": "Jersey City",
          "state": "New Jersey"
        },
        {
          "city": "Lakewood",
          "state": "New Jersey"
        },
        {
          "city": "Livingston",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05333874"
    },
    {
      "nct_id": "NCT00785538",
      "title": "A Study of IMC-A12 in Participants With Tumors Who No Longer Respond to Treatment or For Whom No Treatment is Available",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Advanced Solid Tumors"
      ],
      "interventions": [
        {
          "name": "IMC-A12",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 24,
      "start_date": "2005-10",
      "completion_date": "2011-01",
      "has_results": true,
      "last_update_posted_date": "2019-01-08",
      "last_synced_at": "2026-09-06T20:55:49.749Z",
      "location_count": 3,
      "location_summary": "Scottsdale, Arizona • Detroit, Michigan • Seattle, Washington",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Detroit",
          "state": "Michigan"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00785538"
    },
    {
      "nct_id": "NCT00000758",
      "title": "A Phase III Randomized Trial of Topical Vaginal Fluorouracil (5-Fluorouracil, 5-FU) Maintenance Therapy Versus Observation After Standard Treatment for High-Grade Cervical Dysplasia in HIV-Infected Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "HIV Infections",
        "Cervix, Dysplasia"
      ],
      "interventions": [
        {
          "name": "Fluorouracil",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "13 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "13 Years and older · Female only"
      },
      "enrollment_count": 158,
      "start_date": null,
      "completion_date": "1998-04",
      "has_results": false,
      "last_update_posted_date": "2021-11-04",
      "last_synced_at": "2026-09-06T20:55:49.749Z",
      "location_count": 19,
      "location_summary": "Los Angeles, California • Miami, Florida • Chicago, Illinois + 13 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00000758"
    },
    {
      "nct_id": "NCT07211178",
      "title": "Evaluating Minimal Residual Disease (MRD) Through Longitudinal Circulating Tumor DNA (ctDNA) Profiling in Breast Malignancies",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Breast Cancer",
        "TNBC - Triple-Negative Breast Cancer",
        "HR Positive/HER-2 Negative Breast Cancer",
        "HER2 + Breast Cancer",
        "Early Stage Breast Cancer"
      ],
      "interventions": [
        {
          "name": "There are no interventions in this observational study.",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Tempus AI",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "18 Years to 99 Years"
      },
      "enrollment_count": 900,
      "start_date": "2025-10-27",
      "completion_date": "2033-12",
      "has_results": false,
      "last_update_posted_date": "2026-09-03",
      "last_synced_at": "2026-09-06T20:55:49.749Z",
      "location_count": 16,
      "location_summary": "Birmingham, Alabama • Whittier, California • Weston, Florida + 13 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Whittier",
          "state": "California"
        },
        {
          "city": "Weston",
          "state": "Florida"
        },
        {
          "city": "Carbondale",
          "state": "Illinois"
        },
        {
          "city": "O'Fallon",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07211178"
    },
    {
      "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": "2026-09-06T20:55:49.749Z",
      "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"
    }
  ]
}