{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+group+-+observational",
    "query": {
      "intervention": "Control group - observational"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 533,
    "total_pages": 54,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+group+-+observational&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-11T16:16:41.043Z",
  "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": "NCT03784976",
      "title": "Iyengar Yoga Therapy for Dysmenorrhea and Endometriosis",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Secondary Dysmenorrhea",
        "Dysmenorrhea",
        "Dysmenorrhea Secondary",
        "Polycystic Ovary Syndrome",
        "Endometriosis",
        "Fibroid",
        "Menstrual Pain",
        "Menstrual Disorder",
        "Menstrual Discomfort"
      ],
      "interventions": [
        {
          "name": "Iyengar Yoga Therapy",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Illinois at Urbana-Champaign",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "65 Years",
        "sex": "FEMALE",
        "summary": "12 Years to 65 Years · Female only"
      },
      "enrollment_count": 90,
      "start_date": "2018-07-03",
      "completion_date": "2021-07-02",
      "has_results": false,
      "last_update_posted_date": "2018-12-24",
      "last_synced_at": "2026-09-11T16:16:41.043Z",
      "location_count": 1,
      "location_summary": "Urbana, Illinois",
      "locations": [
        {
          "city": "Urbana",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03784976"
    },
    {
      "nct_id": "NCT05826457",
      "title": "North American Prodromal Synucleinopathy Consortium Stage 2",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "REM Sleep Behavior Disorder",
        "Parkinson Disease",
        "Lewy Body Dementia",
        "Dementia With Lewy Bodies",
        "Multiple System Atrophy",
        "REM Sleep Parasomnias"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 500,
      "start_date": "2022-08-12",
      "completion_date": "2028-05-01",
      "has_results": false,
      "last_update_posted_date": "2026-05-13",
      "last_synced_at": "2026-09-11T16:16:41.043Z",
      "location_count": 8,
      "location_summary": "Los Angeles, California • Redwood City, California • Atlanta, Georgia + 5 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Redwood City",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05826457"
    },
    {
      "nct_id": "NCT01266265",
      "title": "Study of Incidence of Respiratory Tract AEs in Patients Treated With Tyvaso® Compared to Other FDA Approved PAH Therapies",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pulmonary Arterial Hypertension"
      ],
      "interventions": [
        {
          "name": "inhaled prostacyclin",
          "type": "DRUG"
        },
        {
          "name": "prostacyclin",
          "type": "DRUG"
        },
        {
          "name": "subcutaneous and intravenous prostacyclin",
          "type": "DRUG"
        },
        {
          "name": "oral ERA",
          "type": "DRUG"
        },
        {
          "name": "oral PDE5 inhibitors",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "United Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 1333,
      "start_date": "2010-12",
      "completion_date": "2014-12",
      "has_results": true,
      "last_update_posted_date": "2016-02-17",
      "last_synced_at": "2026-09-11T16:16:41.043Z",
      "location_count": 88,
      "location_summary": "Birmingham, Alabama • Mobile, Alabama • Phoenix, Arizona + 65 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Berkeley",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01266265"
    },
    {
      "nct_id": "NCT07579182",
      "title": "Hormones, Outcomes, and Pain Pathways in Exercise Study",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Breast Pain",
        "Mastalgia",
        "Back Pain",
        "Back Pain, Low",
        "Neck Pain",
        "Chest Pain",
        "Activity, Motor",
        "Healthy Aging",
        "Weight, Body",
        "Inflammation",
        "Gonadal Steroid Hormones",
        "Neuronal Plasticity",
        "Neuromuscular Manifestations"
      ],
      "interventions": [
        {
          "name": "Interventional Sports bra",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Houston",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 60 Years · Female only"
      },
      "enrollment_count": 140,
      "start_date": "2026-05-17",
      "completion_date": "2029-09",
      "has_results": false,
      "last_update_posted_date": "2026-06-02",
      "last_synced_at": "2026-09-11T16:16:41.043Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07579182"
    },
    {
      "nct_id": "NCT00002540",
      "title": "Screening for Prostate Cancer in Older Patients (PLCO Screening Trial)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Prostate Carcinoma"
      ],
      "interventions": [
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Medical Examination Assessment",
          "type": "PROCEDURE"
        },
        {
          "name": "Screening Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER",
        "PROCEDURE"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": "74 Years",
        "sex": "MALE",
        "summary": "55 Years to 74 Years · Male only"
      },
      "enrollment_count": 76685,
      "start_date": "1993-11-16",
      "completion_date": "2027-06-30",
      "has_results": true,
      "last_update_posted_date": "2026-07-24",
      "last_synced_at": "2026-09-11T16:16:41.043Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00002540"
    },
    {
      "nct_id": "NCT05031468",
      "title": "Multisite Observational Maternal and Infant Study for COVID-19",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "Licensed or EUA SARS-CoV-2 vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 562,
      "start_date": "2021-07-06",
      "completion_date": "2023-08-16",
      "has_results": false,
      "last_update_posted_date": "2024-06-27",
      "last_synced_at": "2026-09-11T16:16:41.043Z",
      "location_count": 10,
      "location_summary": "Atlanta, Georgia • Chicago, Illinois • New York, New York + 6 more",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Rochester",
          "state": "New York"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05031468"
    },
    {
      "nct_id": "NCT02101385",
      "title": "Randomized Controlled Trial of Genomically Directed Therapy in Patients With Triple Negative Breast Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Malignant Neoplasm of Breast",
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Genomically Directed Monotherapy",
          "type": "DRUG"
        },
        {
          "name": "Observation/Standard Therapy",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Bryan Schneider, MD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 193,
      "start_date": "2014-04-03",
      "completion_date": "2022-09-09",
      "has_results": true,
      "last_update_posted_date": "2023-09-28",
      "last_synced_at": "2026-09-11T16:16:41.043Z",
      "location_count": 29,
      "location_summary": "Birmingham, Alabama • Washington D.C., District of Columbia • Gainesville, Florida + 24 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02101385"
    },
    {
      "nct_id": "NCT07681050",
      "title": "Phosphate in Acute Pancreatitis",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Pancreatitis"
      ],
      "interventions": [
        {
          "name": "Sodium Phosphate",
          "type": "DRUG"
        },
        {
          "name": "Potassium Phosphate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2026-07-09",
      "completion_date": "2029-01",
      "has_results": false,
      "last_update_posted_date": "2026-08-26",
      "last_synced_at": "2026-09-11T16:16:41.043Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07681050"
    },
    {
      "nct_id": "NCT05057754",
      "title": "Sonographic Measurement of Intraneural Blood Flow in the Median Nerve",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Carpal Tunnel Syndrome",
        "Median Nerve Injury"
      ],
      "interventions": [
        {
          "name": "Cooling",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Heating",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Exercising",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Typing",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Using a mouse",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Cooking",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Southern California",
      "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": 20,
      "start_date": "2021-12-13",
      "completion_date": "2022-05-30",
      "has_results": false,
      "last_update_posted_date": "2023-09-28",
      "last_synced_at": "2026-09-11T16:16:41.043Z",
      "location_count": 2,
      "location_summary": "Los Angeles, California • Columbus, Ohio",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05057754"
    },
    {
      "nct_id": "NCT04291612",
      "title": "Observational Study of Women With Endometrial Cancer Who Receive the Standard Treatment for Their Disease",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Endometrial Cancer",
        "Endometrioid Adenocarcinoma",
        "Endometrial Cancer Stage I"
      ],
      "interventions": [
        {
          "name": "Physical exam",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 1715,
      "start_date": "2020-02-26",
      "completion_date": "2027-02-26",
      "has_results": false,
      "last_update_posted_date": "2026-08-07",
      "last_synced_at": "2026-09-11T16:16:41.043Z",
      "location_count": 13,
      "location_summary": "Hartford, Connecticut • Miami, Florida • Orlando, Florida + 10 more",
      "locations": [
        {
          "city": "Hartford",
          "state": "Connecticut"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "Basking Ridge",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04291612"
    }
  ]
}