{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational--+no+intervention",
    "query": {
      "intervention": "observational-- no intervention"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 694,
    "total_pages": 70,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational--+no+intervention&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-11T16:22:28.925Z",
  "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": "NCT01957085",
      "title": "Undiagnosed Hepatitis C Infection in an Urban Hospital",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hepatitis C"
      ],
      "interventions": [
        {
          "name": "observation only",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Temple University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 366,
      "start_date": "2014-06",
      "completion_date": "2016-01",
      "has_results": true,
      "last_update_posted_date": "2020-04-24",
      "last_synced_at": "2026-09-11T16:22:28.925Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01957085"
    },
    {
      "nct_id": "NCT07576985",
      "title": "Evaluating the Efficacy of Intravenous Acetaminophen (IV Tylenol) in Reducing Pain and Agitation in Pediatric Patients Undergoing Elective Tonsillectomy and/or Adenoidectomy",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Tonsillectomy",
        "Adenoidectomy"
      ],
      "interventions": [
        {
          "name": "No Intervention: Observational Cohort",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "MetroHealth Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "8 Years",
        "sex": "ALL",
        "summary": "Up to 8 Years"
      },
      "enrollment_count": 20,
      "start_date": "2025-04-21",
      "completion_date": "2026-08-01",
      "has_results": false,
      "last_update_posted_date": "2026-05-08",
      "last_synced_at": "2026-09-11T16:22:28.925Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07576985"
    },
    {
      "nct_id": "NCT00002968",
      "title": "Edrecolomab in Treating Patients With Stage II Colon Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Mucinous Adenocarcinoma of the Colon",
        "Signet Ring Adenocarcinoma of the Colon",
        "Stage IIA Colon Cancer",
        "Stage IIB Colon Cancer",
        "Stage IIC Colon Cancer"
      ],
      "interventions": [
        {
          "name": "edrecolomab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "laboratory biomarker analysis",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2100,
      "start_date": "1997-05",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2026-06-01",
      "last_synced_at": "2026-09-11T16:22:28.925Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00002968"
    },
    {
      "nct_id": "NCT02877849",
      "title": "Brain Functional Connectivity in Alcohol Use Disorder",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Alcohol Use Disorder"
      ],
      "interventions": [
        {
          "name": "MRI: Brain Imaging data collection",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 82,
      "start_date": "2017-02-09",
      "completion_date": "2019-10-31",
      "has_results": false,
      "last_update_posted_date": "2019-11-06",
      "last_synced_at": "2026-09-11T16:22:28.925Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02877849"
    },
    {
      "nct_id": "NCT06206486",
      "title": "The Gut Microbiome and Serum Metabolites as a Biological Mechanism Underlying Pain in Kidney Transplantation",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Kidney Transplant Symptoms",
        "Gut Microbiome"
      ],
      "interventions": [
        {
          "name": "no intervention, observational",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Illinois at Chicago",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 133,
      "start_date": "2023-10-09",
      "completion_date": "2028-03",
      "has_results": false,
      "last_update_posted_date": "2026-08-17",
      "last_synced_at": "2026-09-11T16:22:28.925Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06206486"
    },
    {
      "nct_id": "NCT03272529",
      "title": "Simulated Rehearsal for Percutaneous Nephrolithotomy",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Nephrolithotomy"
      ],
      "interventions": [
        {
          "name": "Patient-specific simulated rehearsals",
          "type": "OTHER"
        },
        {
          "name": "Idealized simulated rehearsals",
          "type": "OTHER"
        },
        {
          "name": "Standard simulation",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Rochester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 36,
      "start_date": "2018-04-10",
      "completion_date": "2023-01-31",
      "has_results": false,
      "last_update_posted_date": "2023-02-10",
      "last_synced_at": "2026-09-11T16:22:28.925Z",
      "location_count": 1,
      "location_summary": "Rochester, New York",
      "locations": [
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03272529"
    },
    {
      "nct_id": "NCT01241357",
      "title": "High-Tc Susceptometer to Monitor Transfusional Iron Overload",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Transfusional Iron Overload",
        "Thalassemia Major",
        "Sickle Cell Disease",
        "Myelodysplastic Syndromes",
        "Aplastic Anemia"
      ],
      "interventions": [
        {
          "name": "Hepatic biomagnetic susceptibility measurement",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "5 Years to 80 Years"
      },
      "enrollment_count": 99,
      "start_date": "2011-03",
      "completion_date": "2016-05",
      "has_results": false,
      "last_update_posted_date": "2016-09-21",
      "last_synced_at": "2026-09-11T16:22:28.925Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01241357"
    },
    {
      "nct_id": "NCT02876783",
      "title": "Analysis of Stroke Rehabilitation Outcomes",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Stroke"
      ],
      "interventions": [
        {
          "name": "Observational - No intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Weill Medical College of Cornell University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "18 Years to 100 Years"
      },
      "enrollment_count": 273,
      "start_date": "2012-07-25",
      "completion_date": "2017-01-03",
      "has_results": false,
      "last_update_posted_date": "2020-01-31",
      "last_synced_at": "2026-09-11T16:22:28.925Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02876783"
    },
    {
      "nct_id": "NCT07020637",
      "title": "Assessment of Stroke Volume in Shock Using Echocardiography Versus Bioreactive Impedance",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Shock",
        "Critical Illness"
      ],
      "interventions": [
        {
          "name": "Cheetah NICOM",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Nevada, Las Vegas",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 30,
      "start_date": "2024-10-19",
      "completion_date": "2026-04-30",
      "has_results": false,
      "last_update_posted_date": "2026-07-14",
      "last_synced_at": "2026-09-11T16:22:28.925Z",
      "location_count": 1,
      "location_summary": "Las Vegas, Nevada",
      "locations": [
        {
          "city": "Las Vegas",
          "state": "Nevada"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07020637"
    },
    {
      "nct_id": "NCT07775872",
      "title": "Prospective Natural History Study of POLG Disease",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "PolG, Primary Mitochondrial Myopathy"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "The POLG Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "Up to 75 Years"
      },
      "enrollment_count": 300,
      "start_date": "2026-08-01",
      "completion_date": "2031-06-17",
      "has_results": false,
      "last_update_posted_date": "2026-08-20",
      "last_synced_at": "2026-09-11T16:22:28.925Z",
      "location_count": 6,
      "location_summary": "San Diego, California • Aurora, Colorado • New York, New York + 3 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Akron",
          "state": "Ohio"
        },
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07775872"
    }
  ]
}