{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational--+no+intervention&page=3",
    "query": {
      "intervention": "observational-- no intervention",
      "page": 3
    },
    "page_size": 10
  },
  "pagination": {
    "page": 3,
    "page_size": 10,
    "total_count": 699,
    "total_pages": 70,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational--+no+intervention&page=4&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational--+no+intervention&page=2&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-01T05:29:41.210Z",
  "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": "NCT02316691",
      "title": "B-cell Depletion Therapy With Rituximab for Thyroid Eye Disease",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Thyroid Eye Disease"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Pittsburgh",
      "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": 2,
      "start_date": "2016-01",
      "completion_date": "2019-11",
      "has_results": false,
      "last_update_posted_date": "2019-11-18",
      "last_synced_at": "2026-10-01T05:29:41.210Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02316691"
    },
    {
      "nct_id": "NCT04669548",
      "title": "Physiologic Signals and Signatures With the Accuryn Monitoring System - The Accuryn Registry",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Intraabdominal Hypertension",
        "Abdominal Compartment Syndrome",
        "Acute Kidney Injury",
        "Cardiovascular Surgery"
      ],
      "interventions": [
        {
          "name": "Accuryn Monitoring System",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Potrero Medical",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2500,
      "start_date": "2020-12-21",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2022-09-28",
      "last_synced_at": "2026-10-01T05:29:41.210Z",
      "location_count": 9,
      "location_summary": "Los Angeles, California • San Francisco, California • Washington D.C., District of Columbia + 6 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Weston",
          "state": "Florida"
        },
        {
          "city": "Louisville",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04669548"
    },
    {
      "nct_id": "NCT02846077",
      "title": "Multi-scale Modeling of Sleep Behaviors in Social Networks",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Healthy Volunteers"
      ],
      "interventions": [
        {
          "name": "No intervention. Observation only",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Brigham and Women's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 729,
      "start_date": "2013-09",
      "completion_date": "2018-06",
      "has_results": false,
      "last_update_posted_date": "2018-07-11",
      "last_synced_at": "2026-10-01T05:29:41.210Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02846077"
    },
    {
      "nct_id": "NCT03933202",
      "title": "A Study of Suboptimally Controlled Participants Previously Taking Oral or Infusion DMDs for RMS (MASTER-2)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Multiple Sclerosis"
      ],
      "interventions": [
        {
          "name": "Cladribine Tablets",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "EMD Serono Research & Development Institute, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 291,
      "start_date": "2019-07-22",
      "completion_date": "2024-11-11",
      "has_results": true,
      "last_update_posted_date": "2026-01-02",
      "last_synced_at": "2026-10-01T05:29:41.210Z",
      "location_count": 66,
      "location_summary": "Cullman, Alabama • Mobile, Alabama • Little Rock, Arkansas + 58 more",
      "locations": [
        {
          "city": "Cullman",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Fullerton",
          "state": "California"
        },
        {
          "city": "West Hollywood",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03933202"
    },
    {
      "nct_id": "NCT04333953",
      "title": "COVID-19 in Patients With HIV",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "HIV/AIDS",
        "COVID-19",
        "SARS-CoV-2"
      ],
      "interventions": [
        {
          "name": "No intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Missouri-Columbia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 412,
      "start_date": "2020-04-01",
      "completion_date": "2022-03-28",
      "has_results": false,
      "last_update_posted_date": "2022-05-23",
      "last_synced_at": "2026-10-01T05:29:41.210Z",
      "location_count": 1,
      "location_summary": "Columbia, Missouri",
      "locations": [
        {
          "city": "Columbia",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04333953"
    },
    {
      "nct_id": "NCT04899037",
      "title": "Pilot Study to Evaluate the Long-term Chronic Care of Patients Who Could or do Utilize an Osseointegrated Device (OID)",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hearing Loss, Conductive",
        "Hearing Loss, Mixed",
        "Deafness, Unilateral"
      ],
      "interventions": [
        {
          "name": "No intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of South Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 50,
      "start_date": "2021-01-29",
      "completion_date": "2027-12",
      "has_results": false,
      "last_update_posted_date": "2026-09-09",
      "last_synced_at": "2026-10-01T05:29:41.210Z",
      "location_count": 1,
      "location_summary": "Tampa, Florida",
      "locations": [
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04899037"
    },
    {
      "nct_id": "NCT07069400",
      "title": "An International Observational Study of Adults With Acute Infection",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Infectious Disease"
      ],
      "interventions": [
        {
          "name": "No intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1500,
      "start_date": "2025-08-25",
      "completion_date": "2027-06-08",
      "has_results": false,
      "last_update_posted_date": "2026-08-27",
      "last_synced_at": "2026-10-01T05:29:41.210Z",
      "location_count": 20,
      "location_summary": "Tucson, Arizona • Palo Alto, California • San Francisco, California + 16 more",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07069400"
    },
    {
      "nct_id": "NCT01419418",
      "title": "Patients' Perspectives of Factors That Support the Management of Peripheral Arterial Disease for Improved Outcomes",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Peripheral Arterial Diseases"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "VA Eastern Colorado Health Care System",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "89 Years",
        "sex": "ALL",
        "summary": "18 Years to 89 Years"
      },
      "enrollment_count": 10,
      "start_date": "2011-01",
      "completion_date": "2016-12",
      "has_results": false,
      "last_update_posted_date": "2017-05-23",
      "last_synced_at": "2026-10-01T05:29:41.210Z",
      "location_count": 1,
      "location_summary": "Denver, Colorado",
      "locations": [
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01419418"
    },
    {
      "nct_id": "NCT07008924",
      "title": "Partial Sleep Restriction in Chronic Low Back Pain: A Feasibility Study",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Chronic Low-back Pain",
        "Insomnia",
        "Sleep"
      ],
      "interventions": [
        {
          "name": "No intervention is provided. We monitor natural recovery to full sleep.",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Kansas Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "25 Years to 65 Years"
      },
      "enrollment_count": 50,
      "start_date": "2022-07-14",
      "completion_date": "2025-12-31",
      "has_results": false,
      "last_update_posted_date": "2025-06-06",
      "last_synced_at": "2026-10-01T05:29:41.210Z",
      "location_count": 1,
      "location_summary": "Kansas City, Kansas",
      "locations": [
        {
          "city": "Kansas City",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07008924"
    },
    {
      "nct_id": "NCT02995941",
      "title": "Shoulder Symptom Irritability Scale: A Single-Blinded Observational Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Shoulder Pain",
        "Pain"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "St. Luke's Hospital and Health Network, Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 138,
      "start_date": "2016-12",
      "completion_date": "2017-07",
      "has_results": false,
      "last_update_posted_date": "2019-09-20",
      "last_synced_at": "2026-10-01T05:29:41.210Z",
      "location_count": 17,
      "location_summary": "Washington, New Jersey • Allentown, Pennsylvania • Bath, Pennsylvania + 11 more",
      "locations": [
        {
          "city": "Washington",
          "state": "New Jersey"
        },
        {
          "city": "Allentown",
          "state": "Pennsylvania"
        },
        {
          "city": "Allentown",
          "state": "Pennsylvania"
        },
        {
          "city": "Bath",
          "state": "Pennsylvania"
        },
        {
          "city": "Bethlehem",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02995941"
    }
  ]
}