{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+Control&page=22",
    "query": {
      "intervention": "Observational Control",
      "page": 22
    },
    "page_size": 10
  },
  "pagination": {
    "page": 22,
    "page_size": 10,
    "total_count": 644,
    "total_pages": 65,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+Control&page=23&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+Control&page=21&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-24T20:26:32.811Z",
  "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": "NCT02802449",
      "title": "To Study the Nutri-Genomic Response of Vit-D Supplementation in African-Americans",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hypovitaminosis D"
      ],
      "interventions": [
        {
          "name": "25 Hydroxy- Vitamin D3 [25 (OH) D3]",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Charles Drew University of Medicine and Science",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 330,
      "start_date": "2013-09",
      "completion_date": "2018-07",
      "has_results": true,
      "last_update_posted_date": "2019-02-15",
      "last_synced_at": "2026-10-24T20:26:32.811Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02802449"
    },
    {
      "nct_id": "NCT00476294",
      "title": "Long-Term Follow Up Study for AMD3100 Patients",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Myeloma"
      ],
      "interventions": [
        {
          "name": "Telephone Questionnaire",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "78 Years",
        "sex": "ALL",
        "summary": "18 Years to 78 Years"
      },
      "enrollment_count": 7,
      "start_date": "2006-10",
      "completion_date": "2012-07",
      "has_results": false,
      "last_update_posted_date": "2012-07-11",
      "last_synced_at": "2026-10-24T20:26:32.811Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00476294"
    },
    {
      "nct_id": "NCT05026541",
      "title": "Resilience to Sleep Deprivation and Changes in Sleep Architecture in Shoonya Meditators",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sleep",
        "Sleep Deprivation",
        "Cognitive Change"
      ],
      "interventions": [
        {
          "name": "Nap Practitioners",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Shoonya Meditation",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Beth Israel Deaconess Medical Center",
      "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": 72,
      "start_date": "2022-09-12",
      "completion_date": "2026-04-12",
      "has_results": false,
      "last_update_posted_date": "2026-05-22",
      "last_synced_at": "2026-10-24T20:26:32.811Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05026541"
    },
    {
      "nct_id": "NCT02584296",
      "title": "Physical Activity as Self-Management Approach to Improve Health Outcomes in AML",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Leukemia",
        "Myeloid",
        "Monocytic"
      ],
      "interventions": [
        {
          "name": "BSMA",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Virginia Commonwealth University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 23,
      "start_date": "2015-03",
      "completion_date": "2016-11",
      "has_results": false,
      "last_update_posted_date": "2017-01-06",
      "last_synced_at": "2026-10-24T20:26:32.811Z",
      "location_count": 1,
      "location_summary": "Richmond, Virginia",
      "locations": [
        {
          "city": "Richmond",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02584296"
    },
    {
      "nct_id": "NCT03715829",
      "title": "A Phase 2b Study To Evaluate The Efficacy And Safety Profile Of PF-06651600 And PF-06700841 In Active Non-segmental Vitiligo Subjects",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Active Non-segmental Vitiligo"
      ],
      "interventions": [
        {
          "name": "PF-06651600",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        },
        {
          "name": "PF06700841",
          "type": "DRUG"
        },
        {
          "name": "narrow-band UVB phototherapy",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DEVICE"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 366,
      "start_date": "2018-11-26",
      "completion_date": "2021-02-05",
      "has_results": true,
      "last_update_posted_date": "2022-03-25",
      "last_synced_at": "2026-10-24T20:26:32.811Z",
      "location_count": 40,
      "location_summary": "Huntington Beach, California • Irvine, California • Los Angeles, California + 25 more",
      "locations": [
        {
          "city": "Huntington Beach",
          "state": "California"
        },
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Murrieta",
          "state": "California"
        },
        {
          "city": "Oceanside",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03715829"
    },
    {
      "nct_id": "NCT04264767",
      "title": "Characterization of Methylation Patterns in Cancer and Non-Cancer cfDNA",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cancer",
        "Solid Tumor",
        "Hematologic Neoplasms"
      ],
      "interventions": [
        {
          "name": "Blood collection",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Nucleix Ltd.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "22 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "22 Years to 80 Years"
      },
      "enrollment_count": 800,
      "start_date": "2019-04-17",
      "completion_date": "2021-01-30",
      "has_results": false,
      "last_update_posted_date": "2022-06-08",
      "last_synced_at": "2026-10-24T20:26:32.811Z",
      "location_count": 2,
      "location_summary": "Glendale, California • Los Angeles, California",
      "locations": [
        {
          "city": "Glendale",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04264767"
    },
    {
      "nct_id": "NCT03540030",
      "title": "Opioid-Free Shoulder Arthroplasty",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Opioid Use",
        "Shoulder Osteoarthritis",
        "Avascular Necrosis",
        "Rotator Cuff Tear",
        "Arthritis;Inflammatory"
      ],
      "interventions": [
        {
          "name": "Gabapentin",
          "type": "DRUG"
        },
        {
          "name": "Celecoxib",
          "type": "DRUG"
        },
        {
          "name": "toradol",
          "type": "DRUG"
        },
        {
          "name": "acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "regional block",
          "type": "DRUG"
        },
        {
          "name": "propofol",
          "type": "DRUG"
        },
        {
          "name": "IV lidocaine",
          "type": "DRUG"
        },
        {
          "name": "rocuronium",
          "type": "DRUG"
        },
        {
          "name": "vecuronium",
          "type": "DRUG"
        },
        {
          "name": "sevoflurane",
          "type": "DRUG"
        },
        {
          "name": "desflurane",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "OrthoCarolina Research Institute, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 86,
      "start_date": "2016-09",
      "completion_date": "2019-06",
      "has_results": true,
      "last_update_posted_date": "2020-10-14",
      "last_synced_at": "2026-10-24T20:26:32.811Z",
      "location_count": 1,
      "location_summary": "Charlotte, North Carolina",
      "locations": [
        {
          "city": "Charlotte",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03540030"
    },
    {
      "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": "2026-10-24T20:26:32.811Z",
      "location_count": 1,
      "location_summary": "Culver City, California",
      "locations": [
        {
          "city": "Culver City",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05349019"
    },
    {
      "nct_id": "NCT04745000",
      "title": "Observational Study of Actigraphy in Pediatric Pulmonary Arterial Hypertension",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hypertension;Pulmonary;Primary"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "6 Years",
        "sex": "ALL",
        "summary": "Up to 6 Years"
      },
      "enrollment_count": 43,
      "start_date": "2021-02-11",
      "completion_date": "2022-04-14",
      "has_results": false,
      "last_update_posted_date": "2023-05-10",
      "last_synced_at": "2026-10-24T20:26:32.811Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04745000"
    },
    {
      "nct_id": "NCT05203393",
      "title": "500 \"Normal\" Adult Subjects Who Have Experienced no Known Brain Injury Will Participate in Collecting Data That Will Assist With the Optimization of the Diagnostic Capabilities of the Harmony in Detecting Neurologic Abnormalities.",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cranial Waveform in Normal Patients as a Result of Cardiac Cycle",
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Harmony Headset",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "MindRhythm, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "18 Years to 100 Years"
      },
      "enrollment_count": 500,
      "start_date": "2023-01-15",
      "completion_date": "2023-01-15",
      "has_results": false,
      "last_update_posted_date": "2022-11-16",
      "last_synced_at": "2026-10-24T20:26:32.811Z",
      "location_count": 1,
      "location_summary": "Cupertino, California",
      "locations": [
        {
          "city": "Cupertino",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05203393"
    }
  ]
}